Continuous oil pipe horizontal well drilling grinding and pumping type composite bridge plug process

Abstract

The invention discloses a continuous oil pipe horizontal well drilling grinding and pumping type composite bridge plug process, which comprises the following steps of: (1) installing ground equipment; (2) connecting the ground equipment with a continuous oil pipe well pigging and washing tool string; (3) putting the continuous oil pipe well pigging and washing tool string into a well; (4) detecting the position of a fish top of a composite bridge plug, and performing well washing; (5) connecting the ground equipment with the continuous oil pipe well pigging and washing tool string; (6) putting the continuous oil pipe well pigging and washing tool string into the well; (7) performing drilling and grinding operation; (8) pumping three-side glue liquid into the well after the bridge plug is penetrated through drilling; and (9) putting down a continuous oil pipe (3) and performing the drilling grinding operation on the next bridge plug. The process has the advantages that the bridge plug drilling and grinding under pressure can be directly performed after the fracture without the pressure relieving; the construction period is short; the work intensity is low; and the stratum energy loss can be effectively prevented.

Description

Technical field [0001] The invention relates to the technical field of downhole operations of oil and gas wells, in particular to a drilling and grinding pumping type composite bridge plug technology for coiled tubing horizontal wells. Background technique [0002] In recent years, with the rapid development of exploration for shale gas and tight oil and gas reservoirs, horizontal well volume fracturing technology has been widely used. For such large-scale fracturing operations, horizontal well pumping composite bridge plug staged fracturing technology is mostly used. Affected by wellbore structure and fracturing, this process is easy to produce bridge plug sand burial after the pressure is released, which causes well blockage and reduces production. It is necessary to drill and grind the bridge plug to achieve full-diameter production; the conventional technology is used for drilling and grinding pumping. Composite bridge plugs need to be blown out and kill wells before they can...

AI Technical Summary

Problems solved by technology

Affected by the wellbore structure and fracturing, this process is easy to produce bridge plug sand burial after fracturing, which will cause well plugging and reduce production. Composite bridge plugs need to be well killed after blowout, which is difficult, high risk of well control, time-consuming and labor-intensive, and can easily cause reservoir blockage of oil and gas wells, affecting production

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