Indoor experiment shaft device and method for synchronous or asynchronous multistage clustering fracturing of two horizontal wells

Abstract

The invention provides an indoor experiment shaft device for synchronous or asynchronous multistage clustering fracturing of two horizontal wells and a simulation method. The device and simulation method are used for indoor experiment simulation of synchronous or asynchronous multistage clustering fracturing of two shale horizontal wells. A designed multistage clustering fracturing experiment shaft can simulate influences of the number of horizontal well fracturing segments, number of perforation clusters, perforation parameters and the like on synchronous or asynchronous fracturing fracture shapes. The experiment scheme comprises the six steps of making of an experiment scheme, machining of a special experiment shaft, machining of a test piece, preparation of fracturing fluid, an extended experiment of fracturing fractures, and CT scanning of an experiment result. The novel fracturing experiment shaft and method are provided for shale reservoir fracturing research, can simulate the joint network fracturing fracture distribution of a reservoir in multistage clustering synchronous fracturing of two horizontal wells or multistage clustering asynchronous fracturing of two wells front and back, and can provide theoretical support for shale reservoir fracturing experiment research and fracturing construction.

Description

technical field [0001] The invention relates to an indoor simulation technology for hydraulic fracturing stimulation of shale reservoirs, which can simulate the initiation and expansion of fractures of two horizontal wells in shale reservoirs for synchronous fracturing or asynchronous "multi-stage clustering" fracturing, and analyze shale physical properties, The influence of construction parameters and perforation parameters on shale synchronous or asynchronous fracturing initiation and fracture distribution, the experimental results can provide basic data for shale field fracturing design and construction. Background technique [0002] The development of shale gas has become the focus of global energy development. The successful development of shale gas in the United States has stimulated the enthusiasm of other countries for the development of shale gas. my country is rich in shale gas resources and has great potential for development. However, the permeability of shale r...

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Problems solved by technology

[0006] 1. Since only a single fluid channel is designed in the existing experimental wellbore, coupled with the limitation of the experimental wellbore size, similar partitioning and perforating devices for field fracturing cannot Realized in laboratory experiments, therefore, the conventional hydraulic fracturing fracture propagation simulation can only simulate the fracture propagation of single-stage perforation in horizontal wells, and the fracture propagation experiment of "multi-cluster perforation" in horizontal wells cannot be carried out

[0007] 2. The fracture shape can only be determined by knocking open the specimen for naked eye observation after the experimental fracturing is completed. Effective, but incapable of determining complex volumetric fracture patterns that form in shale reservoirs

[0008]3. Cannot simulate multi-well synchronous fracturing or asynchronous fracturing of horizontal wells, and cannot study the influence of synchronous fracturing and asynchronous fracturing on fracture morphology of horizontal well fracturing

[0009]4. Processing of fracturing wellbore. In the past, the processing of fracturing wellbore was mainly to drill small holes on the wellbore, which was prone to blockage during the anchoring process of the wellbore, which affected the experiment. result

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