Coiled tubing and other stimulation techniques : formation damage, well stimulation techniques for production enhancement / Mohammed Ismail Iqbal. Shohaib Khan.

Print version record.

Front Cover; Half Title; Series Page -- RIVER PUBLISHERS SERIES IN CHEMICAL, ENVIRONMENTAL, AND ENERGY ENGINEERING; Title Page; Copyright Page; Contents; Preface; Acknowledgement; List of Figures; List of Tables; List of Abbreviations; Chapter 1 -- Coiled Tubing Technology; 1.1 Introduction; 1.2 History; 1.3 Advantages and Limitations; 1.3.1 Advantages of CT System; 1.3.2 Limitations; 1.4 Basic Equipment; 1.4.1 The Coiled Tubing; 1.4.2 CT Manufacturing; 1.4.3 CT Mechanical Performance; 1.4.4 Tubing Reel; 1.4.5 Injector; 1.4.6 Stuffing Box; 1.4.7 Blow Out Preventer (BOP)

1.4.8 Blind Ram Assembly1.4.9 Shear Ram Assembly; 1.4.10 Slip Ram Assembly; 1.4.11 Pipe Ram Assembly; 1.4.12 Control Console, the Power Pack, and Crane; 1.5 Safety and Precautions; 1.5.1 Safety; 1.5.1.1 Safety -- movement of unit; 1.5.1.2 Safety: operations at well; 1.5.2 Precautions; 1.6 Operational Checks and Requirements; 1.7 Operating Procedure; 1.8 Coiled Tubing Applications; 1.8.1 Conventional CT Operations; 1.8.1.1 Jetting for production/activation; 1.8.1.2 Jetting for under balance perforation; 1.8.1.3 Jetting for zone evaluation

1.8.1.4 Jetting to back-flush disposal or injection well1.8.1.5 Sand washing with water; 1.8.1.6 Sand washing with nitrified water; 1.8.1.7 Sand washing with foam; 1.8.1.8 Clean out with a positive displacement motor (PDM); 1.8.1.9 Paraffin removal; 1.8.1.10 Acid spotting; 1.8.1.11 Spotting a cement plug; 1.8.1.12 Zone squeezing with cement; 1.8.1.13 Circulating to kill a well; 1.8.1.14 Gelled sand slurry placement; 1.8.2 Advance CT Operations; 1.8.2.1 Completion with coil tubing; 1.8.2.2 CT-conveyed inflatable packer; 1.8.2.3 Under reaming; 1.8.2.4 Fishing

1.8.2.5 Coiled tubing job in horizontal well1.8.2.6 Logging and perforating; 1.8.2.7 Sand control; 1.8.2.8 Spoolable gas lift string; 1.8.2.9 Cleaning out flow lines; 1.8.2.10 Drilling; 1.9 CT Down Hole Tools; 1.9.1 CT Connectors; 1.9.1.1 Grub screw/dimple connector; 1.9.1.2 Slip connector; 1.9.1.3 Roll on connector; 1.9.2 Twin Flapper Check Valve; 1.9.3 Hydraulic Release Joint; 1.9.4 Ball-Activated Circulation Valve; 1.9.5 Burst Disc Circulation Sub; 1.9.6 CT Jars and Accelerators; 1.9.7 Knuckle Joints; 1.9.8 Flow-Activated Bow String Centralizer; 1.9.9 CT Tubing End Locator

1.9.10 Jetting Tools1.9.11 Lead Impression Block; 1.9.12 Through-Tubing Inflatable Packers and Bridge Plugs; 1.9.13 CTD Motors; 1.10 Trouble Shooting; 1.11 Software Applications in Coil Tubing Operations; 1.12 Coil Tubing Maintenance; 1.13 Case Histories; 1.14 Coiled Tubing -- Specifications; Chapter 2 -- Acidization; 2.1 Sandstone Acidization; 2.1.1 Matrix Acidization; 2.2 Acidization Chemistry; 2.3 Acidiz Acidization Kinetics; 2.3.1 Hydrofluoric Acid Concentration; 2.3.2 Hydrochloric Acid Concentration; 2.3.3 Temperature; 2.4 Acid Additives; 2.4.1 Corrosion Inhibitors

2.4.1.1 Corrosion of metals

Good engineers never stop looking for opportunities to improve the performance of their production systems. Performance enhancement methods are always carefully examined, and production data is analyzed in order to identify determining factors affecting performance. The two main activities of the production engineer in the petroleum and related industries are reservoir stimulation and artificial lift. The classic solution to maximizing a well's productivity is to stimulate it. The basis for selecting stimulation candidates should be a review of the well's actual and theoretical IPR. Low permeability wells often need fracturing on initial completion. In low permeability zones, additional post stimulation production can be significant to the economics, however, the production engineer needs to make management aware of the true long term potential or else overly optimistic projections can easily be made. The main purpose of stimulation is to enhance the property value by the faster delivery of the petroleum fluid and/or to increase ultimate economic recovery. The aim of reservoir stimulation is to bypass near-wellbore damage and return a well to its "natural" productivity / injectivity, to extend a conductive path deep into a formation and thus increase productivity beyond the natural level and to produce hydrocarbon from tight formation. The importance of reservoir stimulation is increasing due to following reasons: * Hydrocarbon fields in their mid-life * Production in these fields are in declining trend * The thrust area: Enhancement of production Hence, to improve productivity of the well matrix stimulation and hydraulic fracturing are intended to remedy, or even improve, the natural connection of the wellbore with the reservoir, which could delay the need for artificial lift. This book presents procedures taken in the Oil & Gas Industry for identifying well problems, and it suggests means of solving problems with the help of the Coil Tube unit which is used for improving well productivity and techniques like Acidizing and Hydraulic Fracturing.

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