A treatment method for shale repeated fracturing

Abstract

The invention discloses a processing method of shale refracturing. The processing method of shale refracturing comprises the steps that shale samples are subjected to initial fracturing and secondaryfracturing, tracks are displayed with different colors, and hydraulic fracture forms is analyzed after two-time fracturing, intuitive interference characteristics of the two fracturing fracture formsafter shale refracturing can be obtained; and in addition, the steering characteristics of initial fracturing fractures of the shale samples under the action of temporary plugging agents are analyzed,the characteristics of initial fracturing pump pressure curves of the shale samples and secondary fracturing pump pressure curves of the first shale sample are analyzed, support for a shale reservoirrefracturing well technological parameter design is provided, and the processing method is of great significance for reactivating shale oil and gas wells which are abandoned or are about to be abandoned. The processing method can be used not only for physical simulation of refracturing shale gas reservoir rock mass, but also for other dense reservoir rock mass, and improves the applicability.

Description

technical field [0001] The present application relates to the technical field of physical simulation test of shale repeated fracturing, in particular to a treatment method for shale repeated fracturing. Background technique [0002] With the adjustment of the global energy structure, the requirements for environmental protection are getting higher and higher. As an efficient and high-quality clean energy, shale gas is the best choice for low-carbon consumption. The recoverable reserves of shale gas in my country are 36.08×10 12 m 3 , ranking first in the world; but because shale gas reservoirs are composed of lithified clay organic matter and minerals, although organic matter can produce rich shale gas, the gaps between these clear-textured rocks are too small, The permeability is low, and it is much more difficult to exploit than conventional natural gas. In order to achieve high-efficiency mining, currently the hydraulic fracturing technology is mainly used for reservoi...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a treatment method for repeated fracturing of shale to solve or partially solve the technical problem of lack of techniques and means for direct observation of repeated fracturing. Fracturing physical simulation, analysis of repeated fracturing initiation and the interaction between primary and secondary fractures under different construction parameters and different dosages of temporary plugging agents, for the reactivation and infill optimization of old wells in shale gas reservoirs design support

Images