A fast calculation method for the stimulated volume of volumetric fracturing horizontal wells in tight oil reservoirs

A technology of stimulation volume and volume fracturing, which is applied in calculation, computer-aided design, and production of fluids, etc., can solve the problems of slow fitting process, long shut-in time of stimulation volume, etc., and achieves strong applicability, simple and fast calculation method, The effect of improving calculation speed

Active Publication Date: 2021-09-07
NORTHEAST GASOLINEEUM UNIV
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a fast calculation method for the stimulation volume of volume fracturing horizontal wells in tight oil reservoirs, which is used to solve the problem of determining the stimulation volume in the prior art. Problems with long well time or slow fitting process

Method used

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  • A fast calculation method for the stimulated volume of volumetric fracturing horizontal wells in tight oil reservoirs
  • A fast calculation method for the stimulated volume of volumetric fracturing horizontal wells in tight oil reservoirs
  • A fast calculation method for the stimulated volume of volumetric fracturing horizontal wells in tight oil reservoirs

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Experimental program
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Effect test

Embodiment 1

[0078] (1) Basic parameters

[0079] The collected basic parameters are shown in Table 1.

[0080] Table 1 basic data table

[0081]

[0082] (2) Calculation results

[0083] Depend on image 3 It can be obtained that the regression line intercept of the depleted flow stage is 4.2492, so the reconstruction volume is 5.02×10 6 m 3 .

[0084] Pseudo-steady depletion flow occurs after the pressure spread reaches the boundary of the reformed area, so the reformed volume can be determined by using the production data combined with the pseudo-steady flow stage flow method.

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Abstract

The invention relates to a fast calculation method for volume fracturing of a tight oil reservoir for horizontal well stimulation, which includes: step 1: collecting production data and basic parameters required for calculation. Including the original pressure, comprehensive compressibility, porosity, and fluid volume coefficient of the formation; step 2, draw the relationship between normalized production and material balance time; step 3, use the pressure change formula in the depletion flow stage to calculate the reformed volume. The invention utilizes the linear flow stage production data to perform linear regression, and combines the linear flow flow equation to determine the permeability. The present invention directly uses the existing production performance data to draw the relation curve, and determines the reformed volume in combination with the pressure change formula in the depleted flow stage, without shut-in or curve fitting, and the calculation method is simple and fast.

Description

Technical field: [0001] The invention relates to the technical field of unconventional oil and gas development, in particular to a fast calculation method for volume fracturing of horizontal wells in tight oil reservoirs. Background technique: [0002] Tight oil reservoirs have complex geological conditions, extremely low permeability, and strong heterogeneity. Due to the low productivity of tight oil reservoirs exploited by conventional methods, volume fracturing technology has become an important means to enhance oil recovery. Through volume fracturing, a complex fracture network can be generated near the main fracture, forming a volume stimulation zone with significantly improved reservoir properties, which greatly increases the overall seepage velocity of the reservoir fluid, can effectively improve the seepage condition of the reservoir, and increase the productivity of the oil well . [0003] Reservoir stimulation volume is an important parameter to evaluate the stimu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/28E21B43/26G06F113/08G06F119/14
CPCE21B43/26G06F30/28G06F2113/08G06F2119/14
Inventor 尹洪军袁鸿飞付春权邢翠巧徐国涵
Owner NORTHEAST GASOLINEEUM UNIV
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