Apparatus and method for measuring fracture viscosity of fracturing fluid

Abstract

The invention relates to a device and method for measuring the breaking viscosity of fracturing fluid. The device includes a gel-breaking evaluation chamber, the interior of which is divided into a first sealed chamber and a second sealed chamber by a partition wall; capillaries and conduits arranged on the partition wall, wherein, when the gel-breaking evaluation chamber is placed upright, the fracturing fluid flowing from the first sealed chamber to the second sealed chamber through the capillary, and the gas flows from the second sealed chamber to the first sealed chamber through the conduit; and a processing unit. Since the gel-breaking evaluation chamber can be placed in a high-temperature and high-pressure environment when detecting the gel-breaking viscosity of the fracturing fluid, and the capillary is always set in the gel-breaking evaluation chamber after heating and pressurizing, the reservoir conditions can be truly simulated. The fracturing fluid gel breaking experiment solves technical problems such as high temperature gel breaking and segmented fine gel breaking. At the same time, the safety of the experimental process can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of oil recovery, in particular to a device for measuring the gel-breaking viscosity of fracturing fluid, and also to a method for measuring the gel-breaking viscosity of fracturing fluid. Background technique [0002] Fracturing fluid is the most important well-entering fluid in reservoir stimulation. In order to reduce the damage of fracturing fluid to the reservoir matrix and fracture conductivity, it is required that the fracturing fluid can completely break the gel and flow back quickly at the end of the construction. Moreover, the gel-breaking performance of the fracturing fluid and the flowback of the gel-breaking fluid affect the effect of the entire fracturing operation to a certain extent. Therefore, the evaluation work of fracturing fluid gel breaking experiment before fracturing operation is extremely important. [0003] In the reconstruction and development of deep and ultra-deep reservoir oil a...

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Problems solved by technology

However, the above-mentioned process can only be measured at normal temperature, so that the gel-breaking viscosity and gel-breaking situation of the fracturing fluid can be compared with the gel-breaking viscosity and gel-breaking situation of the fracturing fluid under real reservoir conditions (such as high temperature and high pressure conditions). big difference

[0006] Therefore, how to solve the problem in the prior art that it is not convenient to measure the breaking viscosity of the fracturing fluid in an environment such as high temperature or high pressure is a technical problem that those skilled in the art need to solve

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