An optimization method for dense cutting and temporary plugging fracturing in a shale horizontal well section

A technology of horizontal well section and optimization method, which is applied in design optimization/simulation, earthwork drilling, sealing/packing, etc., can solve the problems of unclear re-expansion of suppressed fractures, difficulty in construction design, etc.

Active Publication Date: 2022-02-11
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

At present, the dense cutting temporary plugging fracturing technology in the horizontal well section is not yet mature, and there are few related reports on the close cutting temporary plugging fracturing in China. Temporary plugging and fracturing construction design caused great difficulties

Method used

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  • An optimization method for dense cutting and temporary plugging fracturing in a shale horizontal well section
  • An optimization method for dense cutting and temporary plugging fracturing in a shale horizontal well section
  • An optimization method for dense cutting and temporary plugging fracturing in a shale horizontal well section

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Embodiment 1

[0039] Such as figure 1 As shown, the main content of the present invention is a method for optimizing the construction of dense cutting temporary plugging and fracturing in a shale horizontal well section. The main steps include:

[0040] Step S10, obtaining reservoir parameters, well completion parameters, and fracturing operation parameters;

[0041] Among them, reservoir parameters include reservoir thickness, Young's modulus, shear modulus, Poisson's ratio, horizontal maximum principal stress, horizontal minimum principal stress, fracture toughness of reservoir rock, and average length, angle, density, Tensile strength, shear strength, friction coefficient of fracture surface, etc.; completion parameters include perforation cluster number, perforation number and perforation diameter; construction parameters include fracturing fluid rheological parameters, construction displacement, etc. In order to illustrate the optimization method of the present invention, this example...

Embodiment 2

[0076] In order to further illustrate the optimization method of the present invention, the most optimized parameter of construction displacement is still used as an example, and the second embodiment is modified on the basis of the first embodiment, the number of crack clusters is increased from five clusters to seven clusters, and the dense cutting is temporarily carried out. Plugging and fracturing construction displacement optimization.

[0077] Step S10, obtaining reservoir parameters, well completion parameters, and fracturing operation parameters;

[0078] The parameters in Example 2 are shown in Table 1. Only the number of clusters of fractures is changed, which is set to seven clusters. The distribution of natural fractures remains unchanged, and the number of clusters is still used. figure 2 distribution pattern in .

[0079] Step S20, establishing a hydraulic fracturing fluid-solid coupling model through the displacement discontinuity method;

[0080] The establi...

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Abstract

The invention discloses a construction optimization method for close-cut temporary plugging and fracturing in a shale horizontal well section: acquiring reservoir parameters, well completion parameters and fracturing construction parameters; establishing a fluid-solid coupling model for hydraulic fracturing through a displacement discontinuity method; establishing The expansion model of dense cutting temporary plugging fracturing fractures in shale horizontal well sections; calculate the geometric parameters of dense cutting temporary plugging fracturing fractures in shale horizontal well sections based on reservoir parameters, well completion parameters and fracturing operation parameters; The geometric parameters of hydraulic fractures after plugging fracturing and the results of temporary plugging operation are used to optimize the construction parameters. The invention improves the applicability of the dense cutting temporary plugging process in the transformation of shale reservoirs, and achieves the purposes of optimizing the construction design and improving the development effect.

Description

technical field [0001] The invention relates to a staged multi-cluster fracturing reconstruction technology for horizontal wells in shale reservoirs in petroleum engineering, in particular to an optimization method for dense cutting temporary plugging and fracturing operations in shale horizontal well sections. [0002] technical background [0003] The development of society is inseparable from the support of energy, and energy supply is related to national security. With the continuous development of China's economy, the demand for oil and gas resources has been increasing year by year, and the gap between the output of domestic oil and gas resources and the import of foreign oil and gas resources has been increasing, which has created a huge hidden danger to the country's economic development and energy security. With the advent of the new era, development concepts such as innovation, coordination, and green dominate the main theme of national economic development, and at ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/26G06F30/20E21B33/13
CPCE21B43/26E21B43/261E21B33/13E21B47/138E21B2200/20G06F30/20G06F2113/08G06F2111/10E21B47/00E21B49/00
Inventor 杨兆中杨长鑫李小刚易良平贺宇廷
Owner SOUTHWEST PETROLEUM UNIV
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