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A Design Method for Injection-production String of Underground Gas Storage

An injection-production pipe string and design method technology, applied in casing, drill pipe, calculation, etc., can solve the problems of not considering the compression resistance performance of pipe string joints, and not considering the compressive load of pipe strings, so as to ensure long-term safe operation, The effect of improving sealing performance

Active Publication Date: 2017-01-18
BC P INC CHINA NAT PETROLEUM CORP +1
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AI Technical Summary

Problems solved by technology

[0005] The main problems in the existing technology: 1) The injection-production string is still designed with the conventional gas well string design method; 2) The compression load is not considered in the design of the string; 3) The compression resistance of the string joint is not considered

Method used

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  • A Design Method for Injection-production String of Underground Gas Storage
  • A Design Method for Injection-production String of Underground Gas Storage
  • A Design Method for Injection-production String of Underground Gas Storage

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Embodiment Construction

[0026] The content of the present invention is described in detail below in conjunction with accompanying drawing and specific embodiment:

[0027] The invention is mainly used for the design of the injection-production string of the underground gas storage, and mainly includes a standard design module, a compression resistance design module and a triaxial stress design module. Standard design module, that is, according to the design methods described in the standard "SY / T 5724-2008 Casing String Structure and Strength Design" and "Drilling Manual (Party A)", conduct preliminary design of the pipe string to meet the requirements of conventional operations (such as pressure test, etc.); the compression resistance design module is the key point of the design, comprehensively considering the friction caused by the pipe body's own weight, temperature effect, pressure effect (piston effect, expansion effect, bending effect) and fluid flow during the operation process. The impact of...

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Abstract

The invention belongs to the technical field of well drilling and discloses an underground natural gas storage injection-production pipe column designing method. By comprehensively considering the influence on a pipe column from self weight of a pipe body, the temperature effect, the pressure effect and the friction effect generated by fluid flowing, on the basis of design of an existing pipe column, compression loads are considered and matched with the compression efficiency of a pipe column connector to design an underground natural gas storage injection-production pipe column, it is ensured that the compression efficiency of a connector of the designed pipe column meets the operation compression load and sealing requirements, and meanwhile as the triaxial stress of the pipe column is considered for design, the overall structural intensity of the injection-production pipe column can meet the operation load requirement. The underground natural gas storage injection-production pipe column designing method not only can meet the airtightness under stretching loads, but also can meet the airtightness of the pipe column after stretching and compression loads interchange, improve the sealing performance of the pipe column under the interchanged loads and ensure long-term safety operation of the injection-production pipe column.

Description

technical field [0001] The invention belongs to the technical field of drilling, and relates to a design method for an injection-production string of an underground gas storage. Background technique [0002] At present, the underground natural gas storage technology in the world has gradually improved and matured, and many achievements have been made abroad, mainly focusing on the optimization design of gas storage, the control of injection and production operation parameters, the use of numerical simulation to guide operation, and the use of inert gas or other gases. Research on cushion gas as a gas storage. However, in the design of gas storage strings, the design methods of conventional well strings are still adopted, such as equal safety factor method, equal boundary load method, maximum load method, Amoco design method and BEB method, biaxial stress method, triaxial stress method, etc. Stress method, etc., more biaxial stress method is used. [0003] The construction ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B17/00G06F19/00
CPCE21B17/00G16Z99/00
Inventor 王建军
Owner BC P INC CHINA NAT PETROLEUM CORP
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