Testing device for fracturing fluid distribution for multi-perforation cluster near wellbore resistance factor

Abstract

The invention provides a test device for fracturing fluid distribution for multi-perforation cluster near wellbore resistance factor. The device includes a water tank, a water pump, a sand tank, a sand control valve, a throttle valve, a flow meter, a first perforation cluster unit, a second perforation cluster unit, a third perforation cluster unit, a first collecting barrel, a second collecting barrel, a third collecting barrel and a pressure acquisition system. According to the invention, the test work of different resistance can be realized by changing the size of a perforation channel anda steel pipe. After each experiment is finished, the relevant law is analyzed by measuring the liquid and the propping agent in the collecting barrels. According to the research result, the differenceof fracture extension pressure is quantitatively obtained base on to the reservoir property and the stress difference of the logging interpretation and the induced stress theory. The optimized cluster spacing, the variable perforation parameters, the different hole layout scheme and the fracturing fluid type are developed to counteract the difference of the flow resistance as much as possible, soas to improve the uniformity of the distribution of the liquid between the perforation clusters.

Description

technical field [0001] The invention relates to the technical field of oil and gas fields, and more specifically relates to a test device for distribution of fracturing fluid by resistance factors near the wellbore of multi-perforation clusters. Background technique [0002] The modern fracturing concept of complex fracture network volume stimulation has become the dominant idea in horizontal well staged fracturing design and field operation, and has been popularized and applied to horizontal well staged fracturing design in conventional oil and gas reservoirs such as tight oil and gas and low permeability reservoirs middle. In order to achieve the above goals, the combination of cable perforation and bridge plug has gradually developed into the most widely used fracturing technology at present. The multi-cluster continuous perforation technology can simultaneously open multiple main fractures in the same fracturing section, which is beneficial to Form a complex fracture ne...

AI Technical Summary

Problems solved by technology

However, in the past two years, many foreign shale oil and gas fields have used various methods such as downhole optical fiber distributed acoustic technology and chemical tracer technology to investigate the fracturing efficiency and production contribution rate of perforation clusters. The fracturing fluid of the agent is not evenly distributed among the perforation clusters as expected and promotes the extension of multiple fractures, resulting in large differences in the size and effective conductivity of the main fractures, which will inevitably weaken the overall coverage and complexity of the fracture network. property, affecting the stimulation effect of shale reservoirs

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