CGE578 Drilling Engineering II UITM Assignment Sample Malaysia

CGE578 Drilling Engineering II is an advanced course offered by Universiti Teknologi MARA (UiTM) for students pursuing a degree in Petroleum Engineering. The course builds on the fundamental concepts of drilling operations and covers advanced topics related to drilling engineering. It aims to equip students with the necessary knowledge and skills to design, plan, and execute drilling operations in the oil and gas industry.

Throughout the course, students will learn about various drilling techniques, such as directional drilling, horizontal drilling, and underbalanced drilling. They will also gain an understanding of wellbore stability, well control, and drilling optimization. The course will also cover drilling fluids, drilling bit technology, casing design, and cementing operations.

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Here, we will provide some assignment outlines. These are:

Assignment Outline 1: Outline the wellbore problems to provide preventive and corrective methods in reducing the Non-Productive Time (NPT) and Loss-Productive Time (LPT).

There are several wellbore problems that can lead to Non-Productive Time (NPT) and Loss-Productive Time (LPT) in drilling operations. Here is an outline of some of the most common problems and potential solutions to prevent and correct them:

Stuck Pipe

  • Prevention: Proper drilling fluid selection and maintenance, use of centralizers to maintain good hole gauge, use of weight indicators to monitor weight on bit, avoiding excessive torque or drag
  • Correction: Application of pipe freeing agents, use of jar tools, careful application of hydraulic pressure to break the stuck pipe free.

Lost Circulation

  • Prevention: Use of lost circulation materials (LCM) and other fluid additives, maintaining proper mud weight, proper drilling fluid circulation rates, avoiding excessive drilling fluid losses through permeable zones
  • Correction: Spotting LCM materials, increasing mud weight, using bridging agents, drilling through the loss zone with specialized equipment

Differential Sticking

  • Prevention: Use of lubricants and drilling fluid additives to reduce friction, use of centralizers to maintain good hole gauge, avoiding excessive torque or drag
  • Correction: Applying hydraulic pressure to break the differential sticking, using drill pipe or wireline tools to free the stuck pipe

Formation Damage

  • Prevention: Selection of drilling fluid compatible with the formation, using lost circulation materials to prevent fluid loss, avoiding excessive overbalance pressure, and maintaining good drilling practices.
  • Correction: Injecting acid or other chemicals into the formation to dissolve the damage, using specialized tools to perforate the formation and increase permeability

Wellbore Instability

  • Prevention: Proper drilling fluid selection and maintenance, maintaining proper mud weight, proper drilling fluid circulation rates, proper drilling practices, use of casing or liner to stabilize the wellbore
  • Correction: Use of specialized equipment to stabilize the wellbore, reaming or drilling through unstable zones with specialized equipment, installing casing or liner to stabilize the wellbore

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Assignment Outline 2: Analyze the right procedures and equipment for various types of well drilling and completion operations.

There are various types of well drilling and completion operations, each with its own specific procedures and equipment. Here are some common types and their respective requirements:

  1. Conventional drilling: This involves drilling a vertical hole to access hydrocarbon reserves. The procedure involves drilling a hole using a rotary bit attached to the end of a drill pipe, which is rotated by a rig. The drilling rig should have a draw works, a rotary table, and a mud system to circulate drilling fluids. The drill bit can be changed as needed, depending on the formation being drilled.
  2. Directional drilling: This technique is used when a well needs to be drilled at an angle to reach a specific location. The procedure involves using specialized drill bits that can change the direction of the wellbore while drilling. The rig should have a rotary steerable system, a mud motor, and a measurement while drilling (MWD) system to provide real-time data on the wellbore location and direction.
  3. Hydraulic fracturing: This technique involves injecting high-pressure fluids into the wellbore to create fractures in the rock, allowing the release of hydrocarbons. The procedure requires specialized equipment such as a frac pump, a blender, a hydration unit, and a sand storage and delivery system. The completion process involves inserting a casing and perforating it at the desired intervals to allow for the flow of hydrocarbons.
  4. Coil tubing drilling: This technique involves using a continuous coil of tubing to drill and complete a well. The procedure involves using a coiled tubing unit, a rigless system that can be deployed on location. The system includes a power unit, a coiled tubing reel, and an injector head. The completion process involves running a production string and perforating it.
  5. Underbalanced drilling: This technique involves drilling a well using a fluid with a lower density than the formation being drilled. The procedure requires specialized equipment such as an underbalanced drilling rig, a choke manifold, and a separator. The completion process involves running a production string and perforating it.

Assignment Outline 3: Determine the suitable drilling technique and completion operation based on well conditions.

The selection of a drilling technique and completion operation for a well depends on several factors such as the geological formation, well depth, formation pressure, formation permeability, reservoir characteristics, and economic considerations. Here are some common drilling techniques and completion operations used in the oil and gas industry:

  1. Rotary Drilling: This is a common drilling technique used for drilling vertical, directional, or horizontal wells. It involves using a rotating drill bit to drill through the rock formations. This technique is suitable for drilling through soft to hard rock formations.
  2. Directional Drilling: This drilling technique is used when a well needs to be drilled at an angle or horizontally. It involves using specialized tools and techniques to steer the drill bit in the desired direction. This technique is suitable for drilling in reservoirs that are not accessible by vertical drilling.
  3. Hydraulic Fracturing: This completion operation is used to enhance the production of oil and gas from low permeability reservoirs. It involves injecting high-pressure fluids into the well to fracture the rock and create pathways for the hydrocarbons to flow. This operation is suitable for wells with low permeability formations.
  4. Gravel Packing: This completion operation is used to prevent the production of sand or other particulate matter from the reservoir. It involves packing the annular space between the wellbore and the formation with gravel. This operation is suitable for wells with unconsolidated formations.
  5. Acidizing: This completion operation is used to increase the permeability of the formation by dissolving the mineral content. It involves injecting acid into the well to dissolve the minerals and create pathways for the hydrocarbons to flow. This operation is suitable for wells with carbonate or limestone formations.

The selection of a drilling technique and completion operation depends on the specific well conditions and the objectives of the well. It is essential to consult with a team of experts to determine the most suitable technique and operation for a particular well.

Assignment Outline 4: Demonstrate communication, leadership and teamwork in planning a well drilling and completion operations based on field case study.

Scenario:

Our team has been tasked with drilling and completing a well in a remote location in a desert. The well is expected to produce oil, and we have a tight deadline to complete the project. Our team consists of five members: a project manager, a drilling engineer, a geologist, a completion engineer, and a field supervisor.

Communication:

Effective communication is crucial for the success of any project, and the drilling and completion of a well is no exception. To ensure everyone is on the same page, we establish regular team meetings to discuss progress, challenges, and plans for the upcoming week.

During the initial meetings, the project manager explains the project objectives and establishes clear expectations for each team member. The drilling engineer provides updates on the drilling plan, while the geologist shares geological data and identifies potential drilling hazards. The completion engineer discusses completion techniques, and the field supervisor informs the team of logistical challenges such as transportation and housing.

Throughout the project, communication channels remain open, and team members are encouraged to share their thoughts and concerns. As a team, we maintain regular communication with stakeholders, including the client and local authorities.

Leadership:

Effective leadership is essential to keep the team focused and motivated, and to ensure the project is completed on time and within budget. The project manager takes charge of the project and serves as the team leader.

The project manager is responsible for setting clear goals and objectives for the team and communicating them effectively. They provide guidance to the team and ensure that each member understands their roles and responsibilities. The project manager also leads the team in developing a contingency plan for potential setbacks.

The project manager encourages open communication, fosters collaboration, and recognizes the contributions of each team member. They also take ownership of the project’s success and hold themselves accountable for any setbacks.

Teamwork:

Teamwork is essential for completing a project successfully. Each team member brings unique skills and expertise to the project, and their contributions are essential to achieving the project’s goals.

The team collaborates closely to ensure the project is completed on time and within budget. The drilling engineer, geologist, and completion engineer work together to identify the best drilling and completion techniques. The field supervisor coordinates logistical challenges and ensures that the team has the necessary equipment and supplies.

The team works together to address challenges and solve problems as they arise. They maintain a positive attitude and support one another, fostering a culture of teamwork and collaboration.

Conclusion:

Effective communication, leadership, and teamwork are essential to planning a successful well drilling and completion operation. By establishing clear objectives, maintaining open communication channels, and working collaboratively, the team can overcome challenges and achieve their goals.

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