Podcast
Questions and Answers
What is the first step in planning a directional well?
What is the first step in planning a directional well?
In planning a directional well, what factors should be considered simultaneously with the well path shape?
In planning a directional well, what factors should be considered simultaneously with the well path shape?
To optimize the well path, who must work together from the outset of the project?
To optimize the well path, who must work together from the outset of the project?
What should the initial design of a directional well propose?
What should the initial design of a directional well propose?
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What type of well trajectory is most often used to hit multiple targets or avoid faulted regions?
What type of well trajectory is most often used to hit multiple targets or avoid faulted regions?
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Which segment is included in the modified S-shaped trajectory that is not present in the regular S-shaped trajectory?
Which segment is included in the modified S-shaped trajectory that is not present in the regular S-shaped trajectory?
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Why might the S-shaped pattern require careful consideration prior to its implementation?
Why might the S-shaped pattern require careful consideration prior to its implementation?
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What information is required to carry out the geometric planning for a Type II well?
What information is required to carry out the geometric planning for a Type II well?
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What additional requirements are unique to directional drilling?
What additional requirements are unique to directional drilling?
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Which equipment is NOT mentioned as unique to directional drilling?
Which equipment is NOT mentioned as unique to directional drilling?
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What is one of the considerations for directional drilling related to well trajectory planning?
What is one of the considerations for directional drilling related to well trajectory planning?
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Study Notes
Planning a Directional Well
- The first step in planning a directional well is determining the well's target location.
- When planning a well path shape, consider the reservoir's geometry, potential obstacles, and the drilling rig's capabilities.
- The well path shape should be planned simultaneously with factors such as the reservoir's geology, wellbore stability, drilling fluids selection, and potential environmental impacts to optimize the well plan.
- The drilling team, reservoir engineers, and geologists must collaborate throughout the project to optimize the well path.
- The initial design for a directional well should propose a well trajectory that meets the objectives of the project, such as reaching an unreachable target, drilling multiple targets, or avoiding obstacles.
- The S-shaped trajectory (or modified S-shaped trajectory) is frequently used to access multiple targets or steer around faulted zones.
- The modified S-shaped trajectory incorporates a build, hold, and drop segment that traditional S-shaped trajectories do not.
- The S-shaped pattern has a longer horizontal reach compared to other well path shapes, which might require careful consideration of the reservoir's complexity and wellbore instability.
- Type II well geometric planning requires:
- Target location and depth
- Reservoir information, including thickness and permeability
- Geological data, such as faults, fractures, and dip angles
- Directional drilling has unique requirements beyond those of vertical drilling, including:
- The use of specialized drilling tools, such as downhole motors, mud motors, and steerable drilling assemblies.
- The ability to measure and control wellbore trajectory deviations.
- The expertise to plan and execute complex well paths.
- The use of casing or cement was NOT mentioned as equipment unique to directional drilling.
- Well trajectory planning in directional drilling demands careful consideration of:
- The formation's geological structure, especially the possibility of faults, fractures, and other geological features;
- The availability of equipment and tools for directional drilling;
- The environmental impact, including safety and potential risks associated with drilling in close proximity to faults or other sensitive geological features.
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Description
Test your knowledge on planning the directional well trajectory, including surface coordinates, geology, mud weights, offset information, rig information, casing points, well profile, and more.
