Large-size and multi-crack simulation device and method for propping agent transportation

Abstract

The invention relates to a large-size and multi-crack simulation device and method for propping agent transportation. The device comprises a crack unit (20), wherein the crack unit (20) comprises a main crack (201) and multi-stage branch cracks (202) arranged on at least one side of the main crack. The device is characterized in that the main crack (201) and the branch cracks (202) are connected through connection parts (203), and the connection parts (203) are provided with control valves (204) which are used for controlling the communicating state between the main crack (201) and the branch cracks. According to the experimental scheme, the control valves (204) are opened or closed, the connection angle between the main crack (201) and the branch cracks (202) is set through angle regulators (205), and the settlement laws of a propping agent in different crack shapes are researched.

Description

technical field [0001] The invention relates to the technical field of oil and gas field development research, in particular to a large-scale multi-fracture simulation device and method for proppant migration. Background technique [0002] As the mining scale of shale gas reservoirs continues to expand, hydraulic fracturing plays a very important role as one of the necessary means to obtain and increase production in shale gas reservoirs. Because the transportation law of proppant in fracture is the key to affect the shape of proppant laying in fracture, it directly determines the final effect of fracturing stimulation. Therefore, it is extremely necessary to study the law of proppant settlement and migration in fractures. The method that is most used and can most objectively reflect the real situation of proppant transport in fractures is the physical simulation experiment of narrow-slit flow, especially the large-scale narrow-slit experimental equipment. [0003] At pres...

AI Technical Summary

Problems solved by technology

[0004] For this reason, a patent discloses a multi-fracture simulation experiment device. Although the gap between the simulation experiment and the actual formation situation has been narrowed, it still has defects: the device cannot be controlled during the experiment, which is specifically reflected in the uncontrollable distribution of fractures. , the angle between cracks or the overall crack shape cannot be adjusted, and the simulated crack shape is relatively simple

And more importantly, even if there are individual patents that disclose a variety of crack forms, it is very inconvenient to replace the device parts to realize it.

Images