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Low-permeability gas reservoir fractured horizontal well output profile inversion interpretation method

A production profile, inversion interpretation technology, applied in earthwork drilling, wellbore/well components, instruments, etc.

Active Publication Date: 2021-02-02
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

Moreover, the application of temperature profile testing technology in the domestic petroleum field mainly focuses on qualitative judgment of fluid type, identification of water outlet location and monitoring of downhole tool working conditions, and quantitative interpretation of the production profile of fractured horizontal wells in low-permeability gas reservoirs based on temperature profile test data and fracture flow at all levels are basically blank

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  • Low-permeability gas reservoir fractured horizontal well output profile inversion interpretation method
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  • Low-permeability gas reservoir fractured horizontal well output profile inversion interpretation method

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[0049] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

[0050] Such as figure 1 As shown in the present invention, a low-permeability gas reservoir fracturing horizontal well production profile inversion interpretation method takes the low-permeability gas reservoir fracturing horizontal well as the target fracturing horizontal well, and takes the fracture half-length distribution as the inversion target parameter As an example, the specific steps of inversion and interpretation of the production profile of a fractured horizontal well in a low-permeability gas reservoir using the metho...

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Abstract

The invention discloses a low-permeability gas reservoir fractured horizontal well output profile inversion interpretation method. The method comprises the following steps that inversion system temperature and fracture half-length distribution are initialized and Markov chain length is initialized to be L<N>; a current fitting evaluation target function is calculated; new fracture half-length distribution is generated and a new fitting evaluation target function is calculated; the new fitting evaluation target function is compared with the current fitting evaluation target function; a Markov chain is generated, and a fracture half-length distribution current inversion solution is output; whether the simulation yield corresponding to the fracture half-length distribution current inversion solution is converged to the actual measurement yield or not is verified, and the fracture half-length distribution inversion solution is output; and the obtained fracture half-length distribution inversion solution is input into a temperature forward modeling prediction model, and the inversion interpretation result of flow of each stage of fracture and output profile of a target fractured horizontal well is calculated. According to the method, the actually measured temperature profile data is inverted, so that the output profile of a low-permeability gas reservoir fractured horizontal well and the flow of each stage of fracture can be quantitatively explained.

Description

technical field [0001] The invention relates to an inversion interpretation method for the production profile of a fractured horizontal well in a low-permeability gas reservoir, belonging to the technical field of oil and gas reservoir development. Background technique [0002] At present, domestic low-permeability gas reservoirs are mainly developed by horizontal wells, and most of the horizontal wells require fracturing to obtain considerable gas production. Therefore, the effect of fracturing directly determines the water quality of low-permeability gas reservoirs. The productivity of flat wells is closely related to the economic benefits of low-permeability gas reservoir development. However, after the fracturing of horizontal wells in low-permeability gas reservoirs is put into production, technical problems such as unclear production profile, unknown flow rate contribution of a single fracture, and difficulty in determining the fracture size are common. Due to the fai...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26E21B49/00G06F30/20G06Q50/02
CPCE21B43/26E21B49/00G06Q50/02G06F30/20
Inventor 李海涛罗红文崔小江李颖蒋贝贝刘畅朱晓萍李保吉邹顺良
Owner SOUTHWEST PETROLEUM UNIV
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