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Method for estimating fracturing reformation volume of shale gas horizontal well

A technology for revamping volumetric and horizontal wells, applied in computing, special data processing applications, instruments, etc., can solve problems such as expensive, difficult to achieve obvious results, poor quality of data acquisition, etc., to achieve simple application, accurate and reliable analysis results, and method rigorous effect

Inactive Publication Date: 2016-03-30
中石化石油工程技术服务有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods have problems such as poor data acquisition quality, large interference from adjacent wells, and high prices, and are easily affected by factors such as economy, environment, construction conditions, and technical adaptability, and are difficult to achieve significant results.

Method used

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  • Method for estimating fracturing reformation volume of shale gas horizontal well
  • Method for estimating fracturing reformation volume of shale gas horizontal well
  • Method for estimating fracturing reformation volume of shale gas horizontal well

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Embodiment Construction

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0018] Step 1, shut-in pressure recovery test, was successfully used for the first time in the Jiaoye X-3HF well in the Fuling shale gas field. On May 20, 2015, the shut-in pressure recovery test was carried out, and the test lasted 367 hours, and the pressure recovery test data were obtained.

[0019] Step 2, pressure-production data deconvolution processing. The deconvolution process of pressure-production data is realized by the following methods:

[0020] Convolution equations for pressure recovery and pressure drop

[0021] Δ p ( L ) = p i - p ( t ) = ∫ 0 t q ( τ ...

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Abstract

The present invention discloses a method for estimating a fracturing reformation volume of a shale gas horizontal well. The method comprises the following steps: performing, by a production gas well, a shut-in pressure recovery test; performing deconvolution processing on a pressure-yield material; transforming a deconvolution result into a pressure response by means of an integral; drawing a pressure difference curve and a pressure derivative curve on a double logarithmic plot; and performing conventional test well interpretation on a curve graph, to estimate a fracturing reformation volume of an artificial fractured gas reservoir. According to the estimation method, a technical problem of after-pressure evaluation of a shale gas horizontal well is resolved from a dynamic perspective. The method is a complementary technical means to fracturing reformation effect evaluation, and has characteristics of being rigorous in method, simple in application, and accurate and reliable in analysis result.

Description

technical field [0001] The invention relates to the field of oil and gas field exploitation, in particular to a method for estimating the fracture volume of a shale gas horizontal well. Background technique [0002] Due to the characteristics of shale gas, such as ultra-low reservoir permeability and various gas occurrence states, conventional fracturing to form a single fracture stimulation technology is no longer applicable. At present, volume fracturing technology is mainly used. This technology refers to that in the process of hydraulic fracturing, the natural fractures are continuously expanded to generate shear slip in brittle rocks, forming a fracture network in which natural fractures and artificial fractures are interlaced, thereby increasing the volume of stimulation, improving initial production and ultimate recovery. At present, microseismic, production profile testing, tracer monitoring and other methods can be used to study the formation characteristics of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/367
Inventor 袁发勇吉玉林杨加祥张国锋张寅程建明邹顺良胡中桂倪方杰樊佳莉
Owner 中石化石油工程技术服务有限公司
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