A new prospect is planned to be drilled by Kenmac Petroleum Corporation on a new licensed Molly field located in the North Sea on Block 14a/b. The tasks involved in well planning are as follows: (a) the estimation and evaluation of pore and fracture pressure and their impact on well planning, (b) a lithology study of the different formations and the steps taken to minimize the occurrence of drilling problems through all different formations, (c) a casing scheme design, (d) a mud programme design for the given well, and (e) a cement type suitable for the application in the given well.
Inhaltsverzeichnis (Table of Contents)
- Introduction
- Objectives
- Pore pressure
- Estimating pore pressure
- Pore pressure importance
- Sources of pore pressure
- Fracture pressure
- Fracture gradient
- Drilling
- Rate of penetration
- Rock mineralogy
- Lithology study
- Sandstone zone
- Shale zone
- Drilling problems
- Casing program
- Conductor casing
- Surface casing
- Intermediate casing
- Production casing
- Production tubing
- Casing setting depth
- Drilling mud
- Basic properties
- Water base mud
- Types of WBM
- Oil base mud
- Cement
- Cement classification
- Cement selection
Zielsetzung und Themenschwerpunkte (Objectives and Key Themes)
This document details the well planning process for a new exploratory well at the Molly field in the North Sea. The document covers the evaluation of pore and fracture pressure, the design of a casing scheme, a mud program, and the selection of appropriate cementation for the well.- Assessing pore and fracture pressure for effective well planning.
- Minimizing drilling problems through various formations.
- Designing a suitable casing scheme for the well.
- Developing a comprehensive mud program for the well.
- Selecting the appropriate type of cement for the well.
Zusammenfassung der Kapitel (Chapter Summaries)
The introduction outlines the objectives of the well planning project, which include drilling a new exploratory well at the Molly field, evaluating reliable data sources for pore and fracture pressure, and designing a casing scheme, a mud program, and the appropriate cementation for the well. Chapter 2 focuses on pore pressure, explaining its importance and how to estimate it. It discusses the relationship between pore pressure and vertical depth and explores the sources of pore pressure. The chapter also delves into fracture pressure and its gradient. Chapter 3 discusses drilling and its related issues, including the rate of penetration, rock mineralogy, lithology study, sandstone and shale zones, and potential drilling problems. Chapter 4 outlines the casing program, covering the different casing types, their setting depths, and their roles in ensuring the well's integrity. Chapter 5 explores drilling mud, its basic properties, and the different types of water-based and oil-based muds. Chapter 6 delves into cement, discussing its classification and the factors to consider when selecting the appropriate type for the well.Schlüsselwörter (Keywords)
The document focuses on well planning, pore pressure, fracture pressure, drilling problems, casing scheme, mud program, cementation, North Sea, Molly field, Kenmac Petroleum Corporation, and the evaluation of abnormal formations.
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- Ataliba Miguel (Author), 2012, Well Planning at Molly Field, Munich, GRIN Verlag, https://www.grin.com/document/278037
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