In the light of the increasing demands of energy consumption, the new hydrocarbon reservoir exploration has been carried out to improve the energy supply. The Holly Field is an untapped hydrocarbon reservoir which contains oil and gas. According to an investigative report, the reservoir is located from 10,500 ft. to 11,750 ft. below the surface. The data from the Holly Field makes it possible to put together an overview of the design of a well there. This report introduces the basic design element of a well with a special focus on the rotary drilling, the well planning, the hydraulic pressure, the casing design, the bottom hole assembly (BHA) equipment and the well completion. In addition, each section will illustrate a design principle briefly. The aim of this report is to outline a comprehensive development programme for the Holly Field well.
Table of Contents
1. Introduction
2. Rotary Drilling
2.1 Introduction to Rotary Drilling
2.2 Hoisting System
2.3 Circulating System
2.4 Rotating System
2.5 System Association
2.6 Selecting a Land Rig
3. Well Planning
3.1 Well Planning
3.2 Pore Pressure
3.3 Fracture Pressure
4. Pore Pressure and Mud Weight
5. Cement
5.1 Introduction to Cement
5.2 Lightweight Additives
5.3 Retarders
5.4 Accelerators
5.5 Heavyweight Additives
5.6 Cement related calculation
6. Casing Design
6.1 Purpose of Casing
6.2 Principle of Casing Selection
7. Selection of BHA
7.1 Principle of Selecting BHA
7.2 Function of Selected BHA
7.3 Determine the number of drill collars
8. Well Completion
8.1 Options for Well Completion
8.2 Bottom-to-Top Design
9. A preview of the well design
10. Conclusion
Project Goals and Themes
This report aims to develop a comprehensive construction and development programme for the Holly Field well, focusing on the technical design requirements for tapping into oil and gas reservoirs located between 10,500 and 11,750 feet below the surface.
- Engineering design of rotary drilling systems and operations.
- Methodologies for well planning, including pore and fracture pressure prediction.
- Chemical and mechanical specifications for cementing and casing design.
- Technical selection criteria for Bottom Hole Assembly (BHA) components.
- Strategic implementation of bottom-to-top well completion methods.
Excerpt from the Book
2.1 Introduction to Rotary Drilling
Exploration of a hydrocarbon reservoir brings uncertainty and risk to the drilling operation such as an unforeseen formation influx. The rotary drilling method has been chosen to implement the Holly Field development programme because it may provide flexible solutions for unpredictable situations. Rotary drilling developed in the early 1800s and today is the most common way of exploring for hydrocarbon reservoirs (Bourgoyne Jr. et al. 2003). A rotary drilling rig normally consists of hoisting, circulating and rotating systems. Each system has a different function, and they achieve a complete cycle of drilling operation by working in association. The following are brief introductions to each system.
Summary of Chapters
1. Introduction: Outlines the scope of well design as an integration of various engineering and scientific disciplines and states the specific objective of designing the Holly Field well.
2. Rotary Drilling: Details the operational components of a rotary drilling rig, including hoisting, circulating, and rotating systems, and their cooperative function.
3. Well Planning: Discusses the critical factors of pore pressure and fracture pressure that must be managed to maintain wellbore integrity.
4. Pore Pressure and Mud Weight: Provides calculations and graphical analysis for determining pore pressure and mud weights at various depths.
5. Cement: Describes the chemical additives used in cement slurries and provides calculations for cement volumes and pressure differentials.
6. Casing Design: Explains the purpose of casing strings and the principles for selecting setting depths based on drilling windows.
7. Selection of BHA: Outlines the selection process for BHA components and provides calculations to determine the required number of drill collars.
8. Well Completion: Covers lower and upper completion options and introduces the bottom-to-top design approach for well facilities.
9. A preview of the well design: Presents a schematic overview of the designed structure for the Holly Field well.
10. Conclusion: Summarizes the key design phases and emphasizes the importance of site-specific engineering approaches.
Keywords
Well design, Rotary drilling, Hydrocarbon exploration, Holly Field, Pore pressure, Fracture pressure, Casing design, Cement slurry, Bottom hole assembly, Well completion, Drilling rig, Formation pressure, Mud weight, Bottom-to-top design, Wellbore integrity.
Frequently Asked Questions
What is the primary focus of this report?
The report focuses on the comprehensive development programme and technical design requirements for the Holly Field well to explore oil and gas reservoirs.
What are the central themes of the work?
Key themes include rotary drilling operations, well planning, cementing, casing design, Bottom Hole Assembly (BHA) selection, and well completion strategies.
What is the ultimate goal of the research?
The primary goal is to outline a detailed development programme that ensures safety, environmental protection, production efficiency, and cost-effectiveness for the Holly Field well.
Which scientific methods are employed?
The study uses empirical data analysis for reservoir conditions, mathematical calculations for pressure and volume management, and standard engineering design principles for drilling operations.
What topics are covered in the main body of the report?
The main body covers the technical breakdown of the drilling process, cement slurry management, casing selection, BHA configuration, and bottom-to-top completion design.
What are the defining keywords of the study?
Key terms include Well design, Rotary drilling, Pore pressure, Fracture pressure, Casing design, BHA, and Well completion.
How is the BHA configuration determined for the Holly Field well?
The BHA configuration is selected based on the need to maintain correct drilling direction, measure well environment conditions, and facilitate smooth drilling, involving a specific set of components like mud motors, stabilizers, and drill collars.
Why is the "bottom-to-top" design approach significant?
This approach is significant because it organizes information from the desired reservoir conditions toward the surface facilities, which clarifies the design process and helps in building a logical, goal-oriented construction vision.
- Quote paper
- Chia Lin Lin (Author), 2014, A Development Programme for the Holly Field Well, Munich, GRIN Verlag, https://www.hausarbeiten.de/document/300527
