Hydrofracture propping agent settlement and permeability testing device

Abstract

The invention discloses a hydrofracture propping agent settlement and permeability testing device which comprises a coal storage layer simulation system, a permeability testing system, a data display control system and a drawing and extracting simulation control system which are sequentially connected through pipelines and are respectively connected with a data display control system through data lines. The hydrofracture propping agent settlement and permeability testing device provided by the invention can be used for simulating the transportation and settlement variation rules of a propping agent during the facture process under conditions of fracture combination of different storage layers, fracture pumping and injecting parameters, different confining pressures and the like, testing the permeability before and after fracture, evaluating the modification effects of different propping agents and the modification effect of the same propping agent under different conditions objectively, and providing a support for the optimization of hydrofracture technology parameters.

Description

technical field [0001] The invention belongs to the technical field of coal reservoir development and production, and in particular relates to a hydraulic fracturing proppant settlement and permeability testing device. Background technique [0002] The degree of development of fractures in coal reservoirs determines the amount of gas produced during coalbed methane development to a certain extent. Due to the effect of multi-stage tectonic movements on coal reservoirs in my country, coal reservoir fractures are generally not developed before development. With the increase of the development depth of coalbed methane wells, this phenomenon is more serious, and coal reservoir reconstruction is becoming more and more important. . Hydraulic fracturing technology has become one of the main technologies for coal reservoir transformation due to its relatively mature technology, wide supply, relatively good reservoir stimulation effect, and relatively low price. In the process of hyd...

AI Technical Summary

Problems solved by technology

[0003] In order to improve the conductivity of coal reservoirs after fracturing, researchers have done fruitful research on the types of fracturing fluids, proppant types, construction pumping parameters, etc., in order to compare the effects of fracturing Accurate understanding, people use the method of well testing to test the permeability after fracturing, due to the huge equipment, difficult relocation, high cost, and the unrepresentative results of the well testing, the on-site construction of wells Not many, and because of its low representativeness, it is impossible to make a more accurate judgment on the effect of reservoir stimulation after fracturing

At the same time, the well test cannot judge the proppant support after fracturing

Only after the underground coal mine is mined, there may be some judgments on the proppant support situation, but the underground is affected by coal mining, and the settlement law of the proppant cannot be determined without special research

And one well cannot represent the support of other wells

Images