Shale gas well gas production string size optimization method

A technology for shale gas wells and gas production pipes, which is applied in earthwork drilling, wellbore/well components, measurement, etc., and can solve problems such as the size selection of gas production pipe strings

Inactive Publication Date: 2020-12-29
SOUTHWEST PETROLEUM UNIV
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a simple and quick method for determining the optimal size of gas production strings in shale gas wells, so as to solve the problem of size selection of gas production strings in the actual production process of shale gas wells

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  • Shale gas well gas production string size optimization method
  • Shale gas well gas production string size optimization method
  • Shale gas well gas production string size optimization method

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Embodiment Construction

[0043] The present invention will be further described below with reference to the accompanying drawings.

[0044] like figure 1 As shown, it is a flow chart of a method for optimizing the size of a gas production pipe string in a shale gas well. According to the pipe string size optimization principles of liquid-carrying, anti-erosion, and low loss, an optimization chart for the size of a gas production pipe string is established, which can quickly determine the size of a shale gas well. Optimal string size; its specific steps are as follows:

[0045] Step 1: Calculate the gas production pipes with sizes of 5-1 / 2", 2-7 / 8", 2-3 / 8", 2", 1-3 / 4", 1-1 / 2" in the shale gas well column, the critical liquid-carrying flow rate under the conditions of gas production from 0 to 300,000 cubic meters per day, water production from 1 to 100 cubic meters per day, and wellbore pressure from 0 to 50 MPa; shale gas wells based on the Tunner model are selected New formula for calculating criti...

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Abstract

The invention relates to a shale gas well gas production string size optimization method in a shale gas field gas production process, and belongs to the field of gas reservoir drainage gas production.The problems that at present, theoretical guidance for shale gas wells is lacked in the aspect of gas production string optimization, and on-site experience of technicians is relied on are solved. According to the technical scheme of the shale gas well gas production string size optimization method, the shale gas well gas production string size optimization method comprises the following steps that according to a liquid-carrying, erosion-preventing and low-loss gas production string size selection principle, by calculating critical liquid-carrying flow, erosion flow and pressure loss of gas production strings with different sizes of a shale gas well under different gas production rates, the size of the string with the minimum pressure loss in a reasonable flow velocity interval is obtained under different gas production rates, water production rates and wellbore pressures, and a result is drawn into a shale gas well gas production string size optimization plate. Technical support is provided for the shale gas well string size optimization, the liquid carrying capacity and the erosion resistance of a gas well can be effectively improved, operation is easy, and the generalizabilityis high.

Description

technical field [0001] The invention relates to a method for optimizing the size of a shale gas well gas production pipe column in the gas production process of a shale gas field, and belongs to the field of drainage and gas production of gas reservoirs. Background technique [0002] During the development of shale gas, with the production of gas wells, the pressure of the gas reservoir decreases, the velocity of the gas flow decreases, and the liquid-carrying capacity of the gas flow becomes worse. At this time, oil pipes of corresponding specifications are lowered, and liquid drainage production is realized by relying on the energy of the shale gas well itself. The size of the gas production string is an important factor affecting the normal production of the gas well. Selecting a reasonable size tubing to prolong the gas production period of the shale gas well. Therefore, the size optimization of the gas production string is of great significance for the development of sh...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): E21B47/00E21B47/06G06Q50/02
CPCE21B47/00E21B47/06G06Q50/02
Inventor谭晓华杨雅凌李晓平毛正林李劲涵李乾
OwnerSOUTHWEST PETROLEUM UNIV