Bài giảng Cơ sở kỹ thuật dầu khí - Chương 7: Well completion and stimulation

Bài giảng Cơ sở kỹ thuật dầu khí - Chương 7: Well completion and stimulation. Nội dung chương này gồm có: Basic completion methods, completion procedure, perforating, stimulation. Mời các bạn cùng tham khảo.
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Bài giảng Cơ sở kỹ thuật dầu khí - Chương 7: Well completion and stimulationWELL COMPLETION and STIMULATION Bài giảng được soạn bởi Bộ môn Khoan – Khai thác Dầu khí Khoa Kỹ thuật Địa chất và Dầu khí Đại học Bách Khoa TP. HCM Tel: (08) 8647256 ext. 5767 GEOPET CONTENTS 1. Basic Completion Methods 2. Completion Procedure 3. Perforating 4. Stimulation Well Completion and Stimulation  2GEOPET 1. BASIC COMPLETION METHODS Well Completion and Stimulation  3GEOPET INTRODUCTION  Once the design well depth is reached, the formation is tested and evaluated.  To complete the production well, PLATFORM casing is installed and cemented, and the drilling rig is dismantled. SEA BED  A service rig is brought in to 30’’ CASING 20’’ CASING perforate the production casing 13 3/8’’ CASING and run production tubing along 7’’ LINER Production casing (9 5/8) with downhole equipments.  Production begins after surface safety equipment installation RESERVOIR inished. Well Completion and Stimulation  4GEOPET WHAT IS COMPLETION? Well completion creates a dependable pathway to the surface for the hydrocarbons. The term ‘completion’ describes the assembly of downhole tubulars and other safety equipments that is required to enable the safe and efficient production of oil or gas from the well after it has been drilled. Well Completion and Stimulation  5GEOPET BASIC WELL COMPLETION TECHNOLOGY  Each drilled wellbore awaiting completion is unique. Even nearby wells drilled to the same reservoir can have differencies in:  depths,  formation characteristics,  and hole sizes  A wide variety of equipment designs and procedures have been developed to provide safe, efficient conduits from subsurface reservoirs to the surface in different situations.  The ideal completion design  minimizes initial completion and operating costs,  providing for the most profitable operation of an oil or gas well over its entire life. Well Completion and Stimulation  6GEOPET TYPE OF COMPLETION Natural Completions Natural completions are those in which little or no stimulation is required for production. Sandstone and carbonate systems with good permeability and mechanical stability are ideal for natural completions. Stimulated Completions These completions are generally applied to improve the natural drainage patterns of hard, low-permeability formations. It is used to remove barriers that prevent easy passage of fluids into the wellbore. Sand-Control Completions Sand-control completions support the formation while allowing the flow of fluids. They are performed in young, unconsolidated or less mechanically competent sandstones. Well Completion and Stimulation  7GEOPET TYPE OF COMPLETION The design of a particular completion depends on: 1. The number and type of productive zones, 2. The expected pressures and flow rates, 3. The need to control sand production, 4. The need for artificial lift or stimulation the regulations governing operations in the area. Well Completion and Stimulation  8GEOPET WELL COMPLETION ACTIVITIES Well completion activities include:  Conducting well test  Setting production casing  Running production tubing along with downhole equipments  Installing surface safety equipments  Startin ...