Shale gas horizontal well bedding fracture evaluation method based on array induction logging information

A technology of array induction and bedding fractures, which is applied in wellbore/well components, earthwork drilling and production of fluids, etc., can solve the problems of high price, low data and high cost, and achieves wide application range, simple method and practicability. strong effect

Active Publication Date: 2019-11-26
中石化石油工程技术服务有限公司 +1
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Problems solved by technology

[0003] The traditional method for evaluating the development degree of bedding fractures in horizontal shale gas wells mainly uses cores from vertical wells. Coring in horizontal shale gas wells is risky and costly. Evaluation of bedding fractures in shale gas horizontal wells directly through cores
Domestic shale gas horizontal wells are mainly drille

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  • Shale gas horizontal well bedding fracture evaluation method based on array induction logging information
  • Shale gas horizontal well bedding fracture evaluation method based on array induction logging information
  • Shale gas horizontal well bedding fracture evaluation method based on array induction logging information

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Embodiment Construction

[0031] The present invention will be described in detail below with reference to the accompanying drawings.

[0032] Concrete steps of the present invention are:

[0033] 1) Collect the array induction resistivity data MARB with a vertical resolution of A feet and a detection depth of B inches in the horizontal section of the horizontal well in the work area,

[0034] The longitudinal resolution A feet is 1 foot, 2 feet or 4 feet,

[0035] The detection depth B inches is 10 inches, 20 inches, 30 inches, 60 inches, 90 inches or 120 inches;

[0036] The dimension of the array induction resistivity data MARB is Ω·m.

[0037] 2) Collect segmental data of fracturing in the horizontal section of the horizontal well in the work area.

[0038] The total number of fracturing segments in the horizontal section of the horizontal well in the work area n, the starting depth SDEPi of the i-th section, and the ending depth EDEPi, where i=1, 2, 3...n,

[0039] The starting depth SDEPi and...

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Abstract

The invention relates to a shale gas horizontal well bedding fracture evaluation method based on array induction logging information. Array induction electrical resistivity data of the horizontal section of a horizontal well in a work area with a longitudinal resolution being A and an investigation depth being B are collected, and fracturing section information of the horizontal section of the horizontal well in the work area is collected; the total number of sections of fracturing sections of the horizontal section of the horizontal well and the initial depth and the end depth of the ith section are collected; the array induction logging data are filtered, dynamic standard array induction electrical resistivity data are obtained, a model MARBD=MARB-MARBF is used, array induction electrical resistivity dynamic deviation data MARBD are calculated, the model is used for calculating array induction electrical resistivity dynamic deviation standard deviation sigma of the i section,and results of bedding fracture development of the horizontal section of the shale gas horizontal well are output. According to the shale gas horizontal well bedding fracture evaluation method, eightwells are applied, results show that the actual total sand adding amount of a single well is higher, and the gas production rate is higher in wells with more developed shale gas horizontal well bedding fractures based on array induction logging information evaluation.

Description

technical field [0001] The technical field of the present invention is shale gas exploration and development, in particular to a method for evaluating bedding fractures of shale gas horizontal wells based on array induction logging data. Background technique [0002] The exploration and development of shale gas has brought a new pattern to global energy. At present, the development of shale gas is mostly based on oil-based mud long horizontal well staged fracturing technology. The fracturing process of shale gas reservoirs uses fracturing trucks to squeeze liquids with high pressure, large displacement and a certain viscosity into shale gas reservoirs. After many fractures are pressed out in the shale gas layer, proppant (such as quartz sand, etc.) is added to fill the fractures to improve the permeability of the gas layer and increase the gas production. When the bedding fractures in horizontal wells develop, the strata are more likely to be opened, and the fractures forme...

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Application Information

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IPC IPC(8): E21B49/00E21B43/26
CPCE21B49/00E21B43/26
Inventor 廖勇季运景饶海涛何浩然冯爱国石元会李艳花曾保林石文睿曾芙蓉李芳
Owner 中石化石油工程技术服务有限公司
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