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Flow-limiting fracturing design method

A design method and fracturing technology, applied in design optimization/simulation, production of fluids, earthwork drilling, etc., which can solve the problems of small number of clusters in a single section and inability of each cluster to uniformly feed liquid.

Active Publication Date: 2020-12-15
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

[0005] The main purpose of the present invention is to provide a flow-limited fracturing design method to solve the problems of the conventional fracturing design method in the prior art that the number of single-stage clusters is small and each cluster cannot be evenly fed into liquid.

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Embodiment Construction

[0019] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0020] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by those of ordinary skill in the art to which this application belongs.

[0021] In the present invention, unless stated otherwise, the used orientation words such as "upper, lower, top, bottom" are usually for the directions shown in the drawings, or for the parts themselves in the vertical, In terms of vertical or gravitational direction; similarly, for the convenience of understanding and description, "inner and outer" refer to the inner and outer relative to the outline of each component itself, but the above orientation words ...

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Abstract

The invention provides a flow-limiting fracturing design method. The flow-limiting fracturing design method comprises the steps of determining the minimum construction displacement Qmin required for forming required artificial fracture parameters; determining a normal construction pressure limit P in the fracturing process; according to the maximum value delta Phmax in the difference value of theminimum horizontal principal stress of each cluster in the single section, determining hole friction resistance delta Pf; determining the maximum construction displacement Qmax allowed by single-section construction according to the normal construction pressure limit P; determining the maximum cluster number m of a single section according to the minimum construction displacement Qmin and the maximum construction displacement Qmax; determining the total number n of single-section perforation holes according to the maximum construction displacement Qmax and the hole friction resistance delta Pf; and according to the total number n of the single-section perforation holes and the minimum horizontal principal stress of each cluster in the single section, determining the number of the perforation holes of each cluster in the single section. According to the method, the problems that in the prior art, a conventional fracturing design method is small in single-section cluster number, and liquid cannot be uniformly fed into each cluster are solved.

Description

technical field [0001] The invention relates to the technical field of flow-limited fracturing operations, in particular to a design method for flow-limited fracturing. Background technique [0002] At present, with the vigorous development of unconventional oil and gas resources, large-scale volume fracturing of horizontal wells has become the main fracturing technology. The number of stages keeps increasing. Conventional fracturing clustering and perforation parameter design methods can no longer meet the needs. in particular: [0003] Conventional fracturing design methods have the following deficiencies: First, the conventional fracturing design method designs the number of single-stage clusters based on experience, and the number of single-stage clusters is often small, the number of single-well fracturing stages is large, the fracturing operation period is long, and the staged tool high cost issues. Second, when determining the number of perforation holes in the fr...

Claims

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Application Information

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IPC IPC(8): E21B43/26G06F30/20
CPCE21B43/26G06F30/20
Inventor 张奎杨向同石善志聂洁净张晔袁亮马汝涛侯腾飞蒋其辉李会丽张扬
Owner BC P INC CHINA NAT PETROLEUM CORP
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