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Fracturing fluid filtration rate prediction method

A prediction method and fracturing fluid technology, applied in the direction of fluid velocity measurement, velocity/acceleration/impact measurement, measuring devices, etc., can solve problems such as inability to fully reflect the law of fracturing fluid fluid loss, and achieve good market prospects and scope of use Wide, calculated and accurate effects

Inactive Publication Date: 2014-07-16
SOUTHWEST PETROLEUM UNIV
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AI Technical Summary

Problems solved by technology

Due to the complexity of formations and the diversity of liquid types, the description of formation fracturing fluid loss by this method cannot fully reflect the actual law of fracturing fluid loss. Lost Velocity Prediction Method

Method used

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  • Fracturing fluid filtration rate prediction method

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Embodiment 1

[0027] A core was taken from an oilfield in the west. The diameter of the core was 2.54 cm. The change of fluid loss with time was measured experimentally. The fluid loss velocity was calculated according to v=Q / (t×A). The specific values ​​are shown in Table 1.

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Abstract

The invention discloses a fracturing fluid filtration rate prediction method. The fracturing fluid filtration rate prediction method sequentially includes the steps that (1) rock cores of specific stratums are manufactured into standard experiment rock cores needed by a high-temperature and high-pressure filtration instrument, a fracturing fluid filtration experiment is carried out at the needed temperature and pressure, the sectional areas A of the experiment rock cores and the filtration amount Q of fracturing fluid passing through the rock cores of the stratums in a certain time t are measured, and the unit area filtration rate v of the specific stratums is obtained according to v=Q / (t*A); (2) according to variable index fracturing fluid filtration rate calculation formula (please see the specification for the calculation formula) related to the specific stratums and the fracturing fluid, undetermined indexes b and filtration coefficients c are calculated, a calculation formulas of the specific stratums and the specific fracturing fluid filtration rate are obtained, and the fracturing fluid filtration rate is accordingly predicted. The fracturing fluid filtration rate prediction method is reliable in principle and easy to operate, the rate of filtration of the fracturing fluid to the stratums can be accurately predicted, theoretical foundations and technology supports are provided for improving the fracturing fluid efficiency and reducing the construction risks in fracturing design, and the fracturing fluid filtration rate prediction method has the good market prospect.

Description

technical field [0001] The invention relates to a method for predicting the filtration rate of fracturing fluid, which belongs to the field of oil and gas field development. Background technique [0002] Hydraulic fracturing, as the main technology for oil and gas stimulation at present, can reduce the flow resistance of oil and gas to the bottom of the well, communicate as many natural fractures as possible, expand the oil supply area, and increase oil and gas production. Its application scope has expanded from development fracturing to exploration wells Fracturing has made this technology not only a means of increasing production and injection of oil and gas reservoirs, but also an important method for evaluating and understanding reservoirs. However, in the process of hydraulic fracturing, the fracturing fluid will inevitably leak into the formation under the action of the difference between the fracture fluid pressure and the formation pressure, and the amount of fluid l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P5/00G01N33/24E21B49/00
Inventor 李勇明刘作磊赵金洲张烈辉
Owner SOUTHWEST PETROLEUM UNIV
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