22. Reservoir drill in fluids

Summary

In this video, Abdul Aziz Gob, an accredited instructor in IWF well control and IDC, discusses the importance of reservoir drilling fluid (RDF) in minimizing damage and maximizing productivity during oil extraction. He explains the properties and types of RDF, emphasizing the need for non-damaging materials and proper particle size distribution to maintain reservoir integrity. The video also covers fluid compatibility, environmental considerations, and the cost-effectiveness of RDF. Practical applications and components of different RDF systems are discussed, along with the importance of proper cleanup design and solid control in ensuring successful reservoir drilling.

Takeaways

• 🔧 Reservoir drilling fluid (RDF) is used to minimize damage to the reservoir and maximize productivity during drilling.
• 🛢️ RDF is designed to prevent formation damage, ensuring better oil production by maintaining reservoir integrity.
• 💧 One of the key functions of RDF is to reduce filtrate, preventing formation damage and reducing pore size.
• 🛠️ RDF should have properties that avoid damage to both the formation and the completion assembly while optimizing productivity.
• 🌊 Proper hole cleaning is crucial, especially in horizontal drilling, to avoid blockages and damage to screens.
• 💡 Using non-damaging materials like acid-soluble bridging agents (e.g., marble, calcium carbonates) is essential for effective RDF formulation.
• 🔬 Particle size distribution (PSD) is a critical technique for selecting the right blend of bridging materials to reduce filtrate and form a strong filter cake.
• ⚗️ RDF components should be compatible with reservoir fluids to avoid scaling and other issues that can reduce productivity.
• 🌍 Environmental considerations and cost-effectiveness are important factors in selecting and designing RDFs.
• 🧪 Key RDF systems include water-based, solid-free, and oil-based fluids, each with specific applications and components tailored to the drilling environment.

Q & A

Who is the presenter of the video?

The presenter of the video is Abdul Aziz Gob.

What is Abdul Aziz Gob's professional background?

Abdul Aziz Gob is an accredited instructor in IWF Well Control and IDC, and also a great instructor in Aida Seaman Engineering for both basic and advanced models.

What is the main topic discussed in the video?

The main topic discussed in the video is reservoir drill and fluid, specifically focusing on high-performance mud used in the reservoir section to avoid damage.

Why is it important to use special fluids in the reservoir section?

It is important to use special fluids in the reservoir section to avoid damage that can lead to reduced productivity and increased costs due to the need for stimulation and other remedial actions.

What is the abbreviation for Reservoir Drill and Fluid?

The abbreviation for Reservoir Drill and Fluid is RDF.

What are the key objectives in designing an optimal reservoir drilling fluid?

The key objectives in designing an optimal reservoir drilling fluid are to reduce damage to both the formation and the completion assembly, and to maximize productivity.

What are the primary properties and functions of reservoir drilling fluids?

The primary properties and functions of reservoir drilling fluids include reducing filtrate to prevent damage to the reservoir, maintaining good hole cleaning properties, providing lubricity, and ensuring low fluid loss.

Why is low fluid loss important in reservoir drilling fluids?

Low fluid loss is important because high fluid loss can lead to filtrate entering the formation, causing a flush that damages the reservoir by reducing pore size and leading to higher skin factors.

What is particle size distribution (PSD) and why is it important?

Particle size distribution (PSD) is a technique that involves using a blend of bridging materials to control filtrate and build a strong filter cake, which is essential for preventing filtrate invasion and maintaining reservoir integrity.

What materials are commonly used as bridging agents in reservoir drilling fluids?

Commonly used bridging agents in reservoir drilling fluids include marble, calcium carbonate, and other acid-soluble materials that do not damage the reservoir.

What are the two types of shale inhibitors mentioned in the video?

The two types of shale inhibitors mentioned in the video are asphaltic materials and polyamines, with polyamines like Alco Guard being preferred in reservoir zones for their non-damaging properties.

Why is fluid compatibility with reservoir fluids important?

Fluid compatibility with reservoir fluids is important to prevent scaling and other forms of reservoir damage that can occur when incompatible fluids interact, which can increase the skin factor and reduce productivity.

What environmental and cost considerations must be taken into account when selecting a reservoir drilling fluid?

Environmental considerations include ensuring the fluid meets environmental regulations and restrictions, while cost considerations involve evaluating the overall cost-effectiveness of the fluid, including its impact on productivity and potential remedial actions.

What are some examples of reservoir drilling fluid systems mentioned in the video?

Examples of reservoir drilling fluid systems mentioned in the video include Flow Pro NT (water-based), Flow Pro SF (solid-free water-based), Vipro (high-density water-based), and others like DuraPro and LavaPro.

What is the significance of the production screen test (PST) in reservoir drilling?

The production screen test (PST) is significant because it ensures that the solids content in the mud is minimal before running completion screens, preventing clogging and ensuring efficient production.

How is the cleanup design related to the use of reservoir drilling fluids?

The cleanup design ensures that the drilling fluid is adequately conditioned to remove solids and other damaging materials before running completion screens, optimizing the reservoir's productivity and preventing blockages.

Outlines

00:00

🌟 Introduction and Importance of Reservoir Drilling Fluid

Welcome to the channel! Abdul Aziz Gob, an accredited instructor in IWF well control and IDC sharp, discusses the significance of high-performance muds used in reservoir sections. These specialized fluids prevent reservoir damage, ensuring optimal oil production and reducing financial losses. The key functions of drilling fluids, like reducing filtrate to prevent damage and maintaining reservoir integrity, are highlighted.

05:01

🔧 Techniques for Minimizing Reservoir Damage

The paragraph explains the need for special drilling fluids with non-damaging characteristics to maintain reservoir productivity. It emphasizes the importance of low fluid loss and appropriate bridging materials, like marble or specific polymers, to reduce filtrate and avoid reservoir damage. The use of PSD (Particle Size Distribution) in blending materials for optimal filtration control is also introduced.

10:04

🛠️ Components and Properties of Flow Pro NT System

The Flow Pro NT system's application in various drilling contexts, including horizontal and vertical drilling, is discussed. Its components, such as base brine, fluid loss additives, and bridging agents, are described, emphasizing their non-damaging nature and compatibility with reservoir fluids. The importance of rheology and viscosity management in maintaining drilling efficiency is highlighted.

15:07

🔬 Bridging Materials and Filtration Control

This section elaborates on the use of acid-soluble bridging materials like marble and carbonates for effective filtration control. The significance of PSD in selecting the right blend of materials for a strong filter cake is explained. The process of making and testing the filter cake to ensure minimal filtrate invasion is discussed, emphasizing the importance of maintaining reservoir integrity during drilling.

20:08

⚙️ Additives and Their Roles in Reservoir Drilling Fluids

Various additives used in reservoir drilling fluids, such as pH control agents, shale inhibitors, lubricants, and non-emulsifiers, are described. The importance of using non-damaging materials that are compatible with the reservoir environment is stressed. The role of these additives in maintaining fluid properties and ensuring effective drilling performance is highlighted.

25:08

📏 Testing and Ensuring Clean Completion

The importance of ensuring clean completion in open-hole completions is discussed. Methods to confirm minimal solids in the mud, like the use of centrifuges and the Production Screen Test (PST), are explained. The need for thorough circulation to remove solids and the use of specific tests to check for screen clogging is emphasized, ensuring efficient and cost-effective drilling operations.

Keywords

💡Reservoir Drill-in Fluid (RDF)

Reservoir Drill-in Fluid (RDF) is a specialized type of drilling fluid designed to minimize damage to the reservoir while drilling. Its main purpose is to maintain the integrity of the reservoir formation and maximize productivity. In the video, RDF is discussed in detail, highlighting its importance in reducing filtrate and avoiding damage that can lead to costly production issues.

💡Filtrate

Filtrate refers to the liquid that seeps from the drilling fluid into the surrounding formation. In the context of reservoir drilling, reducing filtrate is crucial because excessive filtrate can cause damage to the reservoir, such as clogging the pore spaces and reducing permeability. The video emphasizes the need for low fluid loss in RDF to prevent such damage.

💡Hole Cleaning

Hole cleaning is the process of removing drill cuttings and debris from the wellbore to ensure efficient drilling operations. Effective hole cleaning is especially important in horizontal drilling, as cuttings tend to accumulate on the low side of the wellbore, potentially causing blockages. The video discusses the methods used for hole cleaning to avoid production issues related to clogged screens.

💡Lubricity

Lubricity refers to the ability of the drilling fluid to reduce friction between the drill string and the wellbore. High lubricity is essential for minimizing wear and tear on drilling equipment and ensuring smooth drilling operations. The video highlights lubricity as a key property of RDF to enhance drilling efficiency, particularly in challenging drilling conditions.

💡Bridging Materials

Bridging materials are additives used in drilling fluids to help form a filter cake on the wellbore walls, preventing excessive fluid loss into the formation. These materials must be non-damaging and acid-soluble to avoid long-term damage to the reservoir. The video mentions various bridging materials, such as marble and calcium carbonate, and their role in forming effective filter cakes.

💡Particle Size Distribution (PSD)

Particle Size Distribution (PSD) refers to the range and proportion of different sized particles in the drilling fluid. A well-designed PSD is crucial for creating a strong, impermeable filter cake that minimizes filtrate invasion. The video explains the importance of PSD in selecting the right blend of bridging materials to optimize reservoir protection.

💡Formation Inhibition

Formation inhibition involves using specific additives in the drilling fluid to prevent swelling and disintegration of shale formations. Shale inhibitors, such as asphaltic materials and polyamines, are used to stabilize the formation and maintain wellbore integrity. The video discusses the use of formation inhibitors in RDF to ensure the stability of the reservoir section during drilling.

💡Environmental Considerations

Environmental considerations are critical in selecting and formulating drilling fluids to minimize the environmental impact of drilling operations. The video stresses the importance of using environmentally friendly components in RDF to comply with regulations and protect the surrounding ecosystem. This includes choosing non-toxic and biodegradable additives.

💡Completion Design

Completion design refers to the process of preparing the well for production after drilling. This involves installing equipment like screens and ensuring that the drilling fluid is compatible with the completion materials. The video highlights the need for careful completion design to avoid clogging screens and ensure efficient production from the reservoir.

💡Cost and Availability

Cost and availability are significant factors in selecting drilling fluids and additives. The video underscores the importance of balancing the performance benefits of RDF with the costs and availability of its components. Efficient cost management ensures that the drilling operations remain economically viable while achieving the desired reservoir protection.

Highlights

Importance of using high-performance mud in reservoir sections to avoid damage and maximize oil production.

Reservoir drill fluid (RDF) has special properties to reduce damage and improve productivity.

The significance of minimizing filtrate to prevent damage to the near wellbore zone and reduce pore size issues.

Using non-damaging materials like marble or calcium carbonates for bridging agents to reduce filtrate.

The need for particle size distribution (PSD) to create strong filter cakes and control filtrate.

Use of non-asphaltic and acid-soluble materials to avoid reservoir damage.

Different RDF systems like Flow Pro NT (water-based), Flow Pro SF (solid-free), and others tailored to various drilling conditions.

Application of RDFs in horizontal drilling, vertical drilling, sidetracks, gas injection wells, and more.

Critical components of Flow Pro NT system: base fluid, fluid loss reducers, viscosifiers, bridging materials, and more.

Importance of fluid compatibility with reservoir fluids to avoid scaling and skin formation.

Usage of specific chemicals like Flo Troll for fluid loss control with high thermal stability.

Formation of strong filter cakes using blended bridging materials to handle high overbalance drilling.

Environmental considerations and cost management in selecting reservoir drilling fluids.

Techniques to ensure low solid content in mud before running completion screens.

Steps for mixing and maintaining the properties of Flow Pro NT system, focusing on acid solubility and low solids content.

Transcripts

low Brocato welcome back my friends to

my youtube channel drilling and work

over this is abdul aziz gob I am

accredited instructor in IWF well

control and IDC which sharp also I am a

great instructor in Aida seaman

engineering for basic and advanced model

school we will continue to the angel law

about very important high-performance

mod which is used in the reservoir

section in order to in order to the in

order to avoid any damage that case that

could happen to the reservoir

today in sha allah who will talk about

something is known as reservoir drill

and fluid actually if we if we try to

drill any well okay why we drill the

well and order finally to get the

production of oil okay so if we have

drilled well and finally we damaged in

the reservoir we will actually the

result we will not get good results and

we will damage the reservoir and we will

lose a lot of money

so we have to make a special fluid to be

used in the reservoir section with

special characterization or special

properties in order to reduce the damage

inside the reservoir okay and side

reservoir actually as we have taken in

the functions of the of the functions of

the drilling fluid one of the functions

is to reduce filtrate why to reduce the

filtrate because if you see that the

filtrate could make a flush flush to the

near will bore zone and makes skin and

makes damage into the reservoir which

leads to reducing the pore size or the

poor throat

and leads to very drastic or

catastrophic problems to the reservoir

and it means more money to make

stimulation for the reservoir so what is

the reservoir drill in fluid or its

abbreviation rdf actually it's a normal

fluid it is the same fluid like the

conventional one but it has some special

properties which is to reduce or make

non damage Inc characteristics to both

the formation and it was a completion

assembly as well okay and also to

maximize productivity if the key

objective in the design of the optimum

reservoir drilling fluid so here what

are the drilling issues that we have to

take care while drilling that is a four

sections good drilling properties like

the hole cleaning especially especially

in the horizontal with what are the hole

cleaning methods that we use in clean

and making hole cleaning for for the

horizontal section and why we are

talking about the hole cleaning because

as you know in the horizontal section

and where cuttings are on the low side

so that wants you to start to make

production to the well these solids will

make blogging to the screens and leads

to a great problem and it may need to go

out to fool with the screen assembly and

at this you will lose a lot of money so

the cost is very important here number

two the lubricity okay number three is a

low fluid loss the low fluid loss

especially the bridging and fluid loss

and Hills to be added in reservoirs owns

actually the low fluid loss here is very

important because as I told you the

filtrate may makes may make flush to the

wellbore zone and it leads to high scan

factor of a positive scan factor and it

is very big problem the bridging saw

that we used here some materials these

materials must be non damaging for

example Lebec or the bully and in axilla

knows it is not used and the reservoir

because it's silly lows silly lows is a

damaging material it can not be acid

available okay so we don't use for

example the back or CMC or anything that

makes damage to the reservoir but

instead we makes very important

technique it's called the PSD or

particle size distribution it's it

depends on using blend of bridging

material in order to help us to reduce

the filtrate okay so we are adding here

a very important bridging the materials

and they must be a said variable for

example like the marble the car some

companies the bar a curb or something

like this so this is very important and

in addition we add some fluid those

additives which are very important and

it has to be non damaging to the

reservoir number three the formation

inhibition actually the shear inhibition

is very important and as I told you in

the formulation of the mud we use shell

inhibitors they are there are two types

of shear inhibitors number one in the

shield inhibitors are asphaltic material

okay like the salt Texas is denied big

zor-el all these chemicals are expensive

material and the other types are bully

Emine so we use the body-aline

and reservoir zone like Alice Bob or

calla guard or from other chemicals so

take care of this very important

flute compatibility with the reservoir

fluids the fluid that we are using ok

must be order brine is why we are using

must be compatible with the reservoir in

order not to make scales or make

damaging to the reservoir and for

forming some skin also making skin

factor to be very high especially in the

near will bore finally in draining

issues we have to take about what the

environmental restrictions to be taken

into into your account okay

and finally and the most important

parameter in all the oil field is the

cost what you pay and when you when your

money comes or as a flow of that cash

flow money okay so there is a void

drilling fluid selections depends on

number one the formation innovation

number two the claim of design and I

told you that the clean up design is

very important due to the screens

especially in the open hole completion

environmental considerations must be

taken into the account and account

completion design fluid compatibility so

that is voir well objectives and dynasty

and bottom hole requirements and finally

the cost and the availability must be

taken into account okay the most the

most famous type of the rdf always of

our drilling fluids are the

hasbro series pro series and are very

important types in the bro series and

there is a were drilling fluid for

example the flow pro in t okay all these

are systems but they are the same like

the conventional one but as i told you

they don't have damaging material okay

so each company makes a system for

itself and call it with a commercial

name in order to make more

money and more Ravine you also the first

type is called flow pro NT which is

water-based reservoir drilling fluid

flow pro SF okay it's solid free

water-based reservoir drilling fluid

vibro which is high density water-based

the reservoir drilling fluid there's a

bro which is oil paste reservoir

drilling fluid lava bro which is

synthetic oil based reservoir drill and

fluid fuzzy bro and which is reversible

oil based reservoir drill in fluid and

the a comprehensive range of the fluids

to meet exacting reservoir and

environmental consideration so all these

pipes or all these systems are used to

drill reservoir section so you can use

any one of them according to the

situation and according to the

parameters all the considerations that

we have talked in the last slide okay

okay what is the applications of the

flow Pro in T system okay it's used in

the horizontal drilling fluid vertical

drilling fluid also under sidetracks

also it is used and in K in gas

injection wells also it is used in the

multi lateral so all of these are in the

reserve water sections okay it can be

used also in the cold tube in the

created fluids and the meaning and in

cooling too and also water injection

what are the components of the flow bra

NT as it is usual system it is like all

the system base fluid fluid loss

producer discuss a fire some bridging

materials from inhibitors and wetting

agent okay we're waiting material so

these are the components but take a

decade that these components must not be

damaging to the reservoir or and must be

acid soluble

okay number one is that bass Brian okay

number two viscous fire fluid rows

additives and bridging agents pH control

inhibition lubricant and breaker system

in order to damages are not due to

damage is a filter is a filter cake

after finishing the job okay so this is

very important is the base Brian what

are the Brian that we use in the flow

bro system actually the flow brew system

why it is the same like the solid free

or low so it non dispersive map it is

the same like it okay so there is no

solids or very little solids and that

okay so the first one in those or the

base fluid is called the bins grades

what are the base brand can be fresh

water can be filled brine it can be

potassium chloride and be calcium

chloride it can be sodium chloride and

it can be sodium provide also other

brands may be calcium bromide not zinc

bromide not potassium for me sodium

formate and cesium for me but actually

the most the most important thing in

this brand that they are compatible with

the reservoir fluids okay so take care

of this very important number two the

viscosity fires what are the viscous

affairs to get there to get the rheology

and viscosity in wine gel strains all

the parameters that helps me in hole

cleaning while drilling with this system

so what are the viscosity fires for the

flow pro NT number one the chemical is

called flow vicinity which is non

clarified and non despairs it as I told

you Montes bears it premium grade of

dance and gum okay

it provides low she reeled buoyant why

it will waste low she reeled one because

as I told you during making

whole cleaning and the horizontal

section it's very important that the

reading of the six RBM and 3 rpm must be

minimum equal to the hole size and so

that the bully mark must be must give

some parameters to the low shitheel

tonight number two when the chemicals

that are used or that may be used in the

flop roll and it's crucifiers is called

by office labelled with it provides also

low shear yield point and it is used in

pin hole upon production number three

and the components for the flow pro in

te fluid loss fluid loss additives fluid

loss against number one is called float

roll and I have already worked it with

this chemical all of this polymer float

roll it's very important polymer it can

be used with high calcium vironment can

be also used in high thermal with high

thermal stability

so the flow troll is very good chemical

it's a hydro i grok zebra by L cross

linking starch it's stable up to 250

Fahrenheit as I told you that the

thermal stability is very high

other types called dual flow it's

hydroxypropyl hydro drug the profile

cross linking cm or carboxy misfiled

star and it is also stable up to 250

thermal the bridging agents the bridging

agents that are used in the reservoir

zoom as I told you they must be acid

soluble they must be acid soluble like

the Baraka like the marble can some

carbonates all these chemicals that are

be used and before we are making the

bridging material we have to make

something is called vertical size

distribution and then we check for

filtrate

with and the sport loss and the total

sparked by using something is called DBT

test which is the permeability plugging

tester okay

it is very important so we use

understood your safe carb or bar

carbonates okay which means the

carbonate and it is used its ground

marble a high purity minimum a 98 acid

soluble okay as I told you and for

example the safe carb to exercise is to

safe carpeting and another one is v carb

20 it's used octave bridge okay up the

bridge is program that's used to make

the BST or particle size distribution to

select is a safe carb land or safe carb

mixture mixture of of those sizes with

different sizes in order to get the

optimum particle size distribution as

you see here this is the filter cake as

you see from the filter cake you see

that there is here the bridging material

okay and the army are covered with

plaster nning effect from the flow those

additives like for example as I told you

floral or other chemicals so this is

very important to make the VSD to make

strong strong strong what's known strong

filter cake while while drilling why we

make this because of the high over

balance that we are draining for the

reservoirs own to avoid any well control

issue okay the invasion control as you

see as I told you here the invasion

control we will talk about it in details

and very importantly on the scope stress

gauge technique and particle size

distribution why we use this because

these are used especially in the

reservoir zone as you see here for

example while drilling without as

some solids some solids or some solids

are making the Pfister cake here okay

and all the filtrate is coming to that

formation this makes a lot of problem so

we use some chemical or some bridging

material to help us to make to control

to control this to control this filtrate

okay by making the particle size

distribution we are using from blend

blend okay or mixture from different

sizes and this why this makes very good

filter cake as you will see insha'Allah

in the next lecture

here as you see here for example if you

weigh as you and that then all all of

that all of the bridging material of the

same size as big as you can so as big

like this okay so that at this time you

will see a lot of bugs between in

between large particles and so that it

will lead the filtrate to be really high

but if we make blend or mixing between

the large particles the medium particles

and the very fine particles we will make

very very strong filter cake and I will

discuss with you the mechanism of

formation of this type of filter cake

and the next class on each one okay and

as you see here it is the same meaning

you are using the same the same size it

will not make good good filtration okay

and it will not make good filter loss

and a lot of filtrate will pass through

them but for example if we use

differences as you see this big is later

this is low and this is lower and is the

least and it is very fine if we are

making mixing of them okay and they may

have use the optic bridge system or also

known as particle size distribution

system in order to get for example which

how many of havoc how many of the little

one help

of the very small one and how many

pounds of that very fine one so if we

are and if we get the best formula for

all this we can make very good very good

bridging and it helped in reducing the

filtrate okay well what is known as

particle size distribution okay and this

is the program that can be used for this

okay

the flow Pro other additives what are

the other additives we can use pH

control like mg o or image or K which

shade inhibition and as I told you we

are using the black color stop or color

guard for example because these are very

important and they are bully a mine not

asphaltic material lubricants can be

used for example the red a green or fine

agree is the most important one non

emulsifiers like safe breakers also are

used by the sides because these are

bacterial places due to the deeper zones

and this is very important as I said

like the safe side or another chemicals

breaker selection depends on the acids

like micro job oxidizers enzymes and the

mod not solving okay now now we will

make open-hole completions

so after ball out of hole with the

cleaning assembly okay with the cleaning

assembly or sleek assembly we will run

in hole with the completion okay we run

in hole with the completion it is

screens okay because if it's open-hole

completions we are running with screens

me a wire grab the screen so that before

ball out of hole okay we have to be sure

100% that the solid percent and the mud

is very little an order not to make

blogging to the to these screens so how

we

make sure that the solids are very

little and the bridging material and the

other stuff can are we have already get

rid of them

have we know this actually there is

something is called the clean up design

there is no clean up design for it if

their completion design utilizes the

gravel back for example the grade of

safe car also carbonates must be

designed to be produced the bag

throw their screens okay they must be

designed to be produced back through the

screens and it doesn't in be in being

production who doesn't make blogging to

that screen okay so until now we need to

know the test to check for what is the

test

it's called production screen Esther or

BST what is the BST it's very important

test and very simple first as you see

this is the cell of the test and this is

a bottle with 100 B so I okay we are

sorry making with this regulator for the

co2 cartridge to increase the pressure

here to be 100 PS alright and we check

for the scub to be to fill this Cup in

one minute this cup must be fail must

must be filled as soon as possible and

as quick as you can

in less than one minute other wine other

otherwise we will continue circulation

we may circulate for six hour seven

hours eight hours and sometimes in order

to get rid of the solids and to get rid

of the solids we have to make the

screens to leave very fine

we have to use the solar control like

the centrifuge number five in order to

make the solids to get rid of all the

solids and the mud and the mud it's very

fine at this type so how we know that by

this is called production screen

perogies

in fact instill steel as you see many

parties stand or standard for of it with

fittings of it is the main company to

provide this committee's equipment cell

capacity is 1200 okay millimeters weight

its weight is ten point five kilograms

and maximum pressure is 100 psi and it

is quick and simple twee used okay we

use any or any of these screens

according to the size of screens that

will be run in hold so according to the

size if it is very fine for example

we'll use this type if it is not very

fine we will use this and other one is

when it is course we will use this type

okay so we use this in the test

according this is called screen insert

in the test it is according to the

screens that we will be used in the

common so it's manufactured from section

of the field screen most types of

completion scrip applicable wire Reb for

example pre-bagged excluder and strata

pack all these types are used as I told

you okay how to makes vests system it is

the same like any water-based mod system

who are making first of all the best

fluid then we adding the makeup water

for example caustic soda or Kosovo - and

soda ash okay then we had the Flores

reducer then we add the couscous fire

and finally well the in Hitchin and the

salt and finally we add waiting

which must be as I told you acid soluble

okay so what are the mixing mixes the

phosphors and floaters user in fresh

water to get the maximum with the

maximum shear to get the maximum

properties of them as in add the salt

then mix the caustic soda and Sol ahead

add the bridging Asian add lubricant if

required and add the color guard or

bully a mind shield inhibitor if

required and finally add run check okay

and adjust if necessary okay what are

the properties of the flow Pro NT as you

see the dynasty with or without calcium

carbonates okay we use mainly high

calcium carbonate the drilling fluid

dynasty is Brian velocities why we are

using here Brian especially this also

treated one because we are taking the

maximum weight of the salt then we are

adding carbon needs for example in order

to be in order to reduce the solids as

much as we can in the month okay we can

increase the dynasty another BBG by

using the calcium carbonate and calcium

carbonate in acid soluble acid soluble

this is very important all of the free

version relies only on brine for its

density okay what are the rheology of

the flow blow aunty properties this is

very important there is inverted the

velocity viscosity why the yield point

is 13 velocity viscosity unhealed wind

is very high as you see is 40 Gel starts

flat and spreads with solids okay but

the gel must be flat why why flat

because if it is progressive it will

make a great problem and you can't run

the screens or the screens may be logged

wire and

rheology really really based on the low

shear values or gloss yield point values

because most of the property is used in

horizontal section

in the reservoir thank you very much

today for the first lesson and the

drilling fluid

I hope insha'Allah I have give you a

good lesson about the drill in fluid and

I hope to see you later inshallah thank

you very much and see you later

inshallah and good bye