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

A technology for stress interference and production capacity prediction, applied in prediction, data processing applications, instruments, etc., and can solve problems such as the reduction of permeability in fractures

Active Publication Date: 2016-08-31
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.

Method used

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

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

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

[0029] Step S1, obtaining basic parameters;

[0030] Step S2, calculating the influence data of the in-situ stress caused by the induced stress generated by each fracture in the multi-stage fracturing of a tight oil horizontal well;

[0031] Step S3, according to the data on the influence of the induced stress generated by each level of fracturing on the in-situ stress, after the fracturing construction, calculate the data on the influence of the fracturing fluid in the reservoir matrix on the pore pressure of the reservoir matrix; ...

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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 specifically 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 development potential. Due to the small pore throat of tight oil and no natural productivity, effective development must be carried out through volume modification of horizontal wells. Therefore, hydraulic fracturing is a necessary step in the development of tight oil. The impact of hydraulic fracturing on the development of tight oil 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 they do not consider the impact of hydraulic fracturing on the productivity of tight oil fractured horizont...

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Application Information

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IPC IPC(8): G06Q10/04G06Q50/06
CPCG06Q10/04G06Q50/06
Inventor 刘立峰冉启全王志平林旺
Owner PETROCHINA CO LTD
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