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.