Method for detecting and evaluating fracturing fluid loss property

Abstract

The invention relates to the field of performance testing of fracturing fluid, and discloses a method for detecting and evaluating fracturing fluid loss property. The detection and evaluation method comprises the steps that fracturing fluid and detection equipment are prepared, the detection equipment comprises an injection system, a transparent or semitransparent micromodel (4) and a flow field imaging system, and a microchannel which is used for simulating matrix pores and provided with an inlet (5) and an outlet (6) is formed in the micromodel (4); the fracturing fluid is injected into themicrochannel through the inlet (5) by using the injection system, and a flow field graph in the microchannel is acquired by using the flow field imaging system; and the fracturing fluid loss propertyis evaluated according to the flow field graph. With application of the technical scheme, rock matrix pores can be simulated through the micromodel, the flowing state of the fracturing fluid in the microchannel is obtained, the flow field graph is obtained, the flowing characteristic of the fracturing fluid is observed more visually, the fracturing fluid loss property is evaluated and more accurate filtration data is obtained.

Description

technical field [0001] The invention relates to performance detection of fracturing fluid, in particular to a detection and evaluation method for fluid loss characteristics of fracturing fluid. Background technique [0002] With the increasing global demand for fossil fuels, the development potential of unconventional and tight reservoirs such as coalbed methane and shale has attracted great attention from the oil and gas industry. Therefore, the efficient development of unconventional oil reservoirs has become an important research topic. field. Hydraulic fracturing is one of the most effective methods to enhance the recovery of unconventional oil reservoirs. As an important index to evaluate the performance of fracturing fluid, the fluid loss of fracturing fluid is related to the effect of hydraulic fracturing. [0003] At present, the commonly used methods for studying fluid loss are mainly macroscopic indoor physical simulation experiments, such as using two artificial...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for detecting and evaluating the fluid loss characteristics of fracturing fluids, so as to solve the problems of complicated operation and inconvenient observation of the flow characteristics of fracturing fluids.

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