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Tight oil productivity prediction method and system considering stress interference and fracturing fluid loss

A technology for stress interference and productivity prediction, which is applied in prediction, earthwork drilling and production, data processing applications, etc., and can solve problems such as the reduction of permeability in fractures

Active Publication Date: 2019-05-07
PETROCHINA CO LTD
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Problems solved by technology

In addition, since the amount of proppant used in fracturing construction remains unchanged, the decrease in fracture width will result in a decrease in permeability in the fracture.

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  • Tight oil productivity prediction method and system considering stress interference and fracturing fluid loss
  • Tight oil productivity prediction method and system considering stress interference and fracturing fluid loss

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Embodiment Construction

[0027] The technical means adopted by the present invention to achieve the intended invention purpose are further described below in conjunction with the drawings and preferred embodiments of the present invention.

[0028] figure 1 It is a flowchart of a method for predicting tight oil productivity considering stress disturbance and fracturing fluid loss according to an embodiment of the present invention. like figure 1 As shown, the method includes:

[0029] Step S1, obtaining basic parameters;

[0030] Step S2, calculating the influence data of the induced stress produced by each stage of fracture on the ground stress in the multi-stage fracturing of the tight oil horizontal well;

[0031] Step S3, according to the data of the influence of the induced stress produced by each stage of fracturing on the ground stress, after the fracturing operation, calculate the data of the influence of the fracturing fluid in the reservoir matrix on the pore pressure of the reservoir mat...

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Abstract

The invention discloses a tight oil productivity prediction method considering stress interference and fracturing fluid filtration loss and a tight oil productivity prediction system thereof. The tight oil productivity prediction method comprises the steps that basic parameters are acquired; influence data of inducted stress generated by each stage of fracturing crack on ground stress in tight oil horizontal well multistage fracturing are calculated; the influence data of fracturing fluid in a reservoir matrix on reservoir matrix pore pressure are calculated after fracturing construction; the influence data of stress interference and filtration loss on the artificial crack size are calculated; the influence data of stress interference and filtration loss on artificial crack permeability are calculated; and a tight oil productivity prediction model is constructed and a tight oil productivity prediction result is acquired.

Description

technical field [0001] The invention belongs to the field of oil and gas field development, and in particular relates to a tight oil productivity prediction method and system considering stress interference and fracturing fluid loss. Background technique [0002] As an unconventional resource, tight oil has a solid reserve base in my country and has great potential for development. Since tight oil has small pore throats and no natural productivity, it needs to be effectively developed through volume stimulation of horizontal wells. Therefore, hydraulic fracturing is a necessary step in the development of tight oil, and the impact of hydraulic fracturing on tight oil development should be considered when predicting production capacity. However, the current tight oil productivity prediction models only predict the development process of fractured horizontal wells, and do not consider the impact of hydraulic fracturing on the productivity of fractured horizontal wells. [000...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B49/00
CPCG06Q10/04G06Q50/06
Inventor 刘立峰冉启全王志平林旺
Owner PETROCHINA CO LTD
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