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Evaluation method of volume fracturing stimulation effect

A technology of volume fracturing and evaluation method, which is applied in the direction of production fluid, earthwork drilling, wellbore/well components, etc., and can solve the problems that the effect of volume fracturing cannot be evaluated objectively, accurately and reasonably

Active Publication Date: 2019-05-28
嘉善县临沪新城实业有限公司
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Problems solved by technology

[0011] One object of the present invention is to provide a method for evaluating the effect of volume fracturing, which is used to solve the problem that the effect of volume fracturing in unconventional tight reservoirs cannot be evaluated objectively, accurately and reasonably

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  • Evaluation method of volume fracturing stimulation effect
  • Evaluation method of volume fracturing stimulation effect
  • Evaluation method of volume fracturing stimulation effect

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Embodiment Construction

[0053] The present invention will be further explained below:

[0054] This method of evaluating the effect of volume fracturing:

[0055] Step 1. Before performing volume fracturing on multiple wells in a block on site, first measure the corresponding initial basic parameters of the multiple wells. The initial basic parameters include volumetric fracturing reservoir in-situ stress parameters and petrophysical parameters; During the volume fracturing construction process of multiple wells in this block, continue to measure the corresponding initial basic parameters related to the fracturing construction during the volume fracturing construction process of the multiple wells in the block.

[0056] Step 2: Calculate the average width of fractures in the fracture network according to the initial basic parameters of a certain well in the block:

[0057]

[0058] Where: w is the average width of the cracks in the fracture network, m; v is Poisson's ratio; E is the Young's modulus of elasti...

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Abstract

The present invention relates to a volume fracturing reforestation effect evaluation method. The volume fracturing reforestation effect evaluation method includes the following steps that: a plurality of wells in a certain region of a field are measured, so that initial basic parameters can be obtained; the average width of fractures in a fracture network is calculated according to the initial basic parameters of a certain well in the region; a constant C is determined according to a boundary condition that the expansion speed of the fractures at an initial time point is equal to the flowing speed of a liquid in the wall at the initial time point; the average fracture length and the number of equivalent fractures in the volume fracturing complex fracture network is solved iteratively, so that key parameters for describing fracture intensity and flow guiding capability in the reforestation volume of volume fracturing can be obtained; a volume fracturing reforestation effect evaluation parameter is calculated; the volume fracturing reforestation effect evaluation parameters of the other volume fracturing wells in the region can be obtained; and the calculation results of the volume fracturing reforestation effect evaluation parameters of the plurality of wells in the region are put into statistics, and the fracturing reforestation effect of the volume fracturing wells is evaluated. With the method of the invention adopted, the reforestation effect of the volume fracturing can be reflected authentically and reasonably.

Description

Technical field [0001] The invention relates to a volume fracturing reconstruction technology for low-permeability unconventional reservoirs, in particular to a method for evaluating the effect of volume fracturing reconstruction. Background technique [0002] Due to its low porosity and low permeability, low-permeability unconventional reservoirs must adopt large-scale volume fracturing technology to achieve industrial development. Volume fracturing technology refers to the use of segmented multi-cluster perforation technology, which uses high net pressure in fractures and inter-fracture interference to realize the communication between artificial fractures and natural fractures and the generation of transverse fractures, forming long and wide reservoirs. , The complex fracture network with high three-dimensional directions makes the oil and gas in the matrix in any direction "shortest" the seepage distance to the fractures, which greatly improves the overall permeability of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCE21B43/26G06Q10/0639G06Q50/02
Inventor 冯福平艾池李清张德平韩旭雷扬
Owner 嘉善县临沪新城实业有限公司
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