Temporary plugging agent for efficient plugging and fracturing in deep oil and gas reservoir seams, preparation method thereof and large-seam high-fracturing process

Abstract

The invention discloses a temporary plugging agent for efficient plugging and fracturing in deep oil and gas reservoir seams, a preparation method thereof and a large-seam high-fracturing process. Thetemporary plugging agent is prepared from the following components in percentage by mass: 5 percent of acrylamide, 1 percent of a composite cross-linking agent, 1 percent of hectorite, 0.1 percent ofammonium persulfate and 92.9 percent of water. The temporary plugging agent is prepared from acrylamide, the composite cross-linking agent, hectorite, ammonium persulfate and water, is suitable for temporary plugging diversion fracturing of high-temperature reservoirs of oil wells, has excellent plugging performance at high temperature, can resist high temperature of 160 DEG C, is appropriate indegradation rate, can guarantee enough construction time, can achieve 100% degradation rate, and thus the problems of pollution to the reservoir and the like are avoided.

Description

[0001]This application is a divisional application. The application number of the original application is 202010257174.1, the filing date is April 02, 2020, and the title of the invention is "temporary plugging agent and its preparation method, and method for temporary plugging and fracturing of high-temperature reservoirs".Technical field[0002]The invention relates to the technical field of oil and gas exploration, in particular to the technical field of temporary plugging and fracturing of oil well reservoirs, in particular to a temporary plugging agent for efficient plugging and fracturing in deep oil and gas reservoir fractures, a preparation method thereof, and a large fracture height Fracturing process.Background technique[0003]With the deepening of oil and gas exploration and development, the hard-to-use reserves continue to increase. At present, the main targets of my country's oil and gas field development are gradually shifting to deep, unconventional oil and gas reservoir...

AI Technical Summary

Problems solved by technology

At present, the main problem of fiber temporary plugging is the limited pressure bearing capacity, while the composite steering material has higher sealing efficiency and pressure bearing capacity for cracks, and the fiber is easy to plug, but it is not easy to be transported over a long distance due to the limitation of winding, which makes it easy to There are few experimental studies on temporary plugging and fracturing of pure particles in fractures near the wellbore, especially for temporary plugging materials under high temperature conditions, and the optimization design of the process plan for particle temporary plugging is not comprehensive and in-depth

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