Full-bore straddling perforation-test combination tubular column and operating method thereof

Abstract

The invention provides an efficient, reliable and multifunctional full-bore straddling perforation-test combination tubular column and an operating method thereof aiming at the situation that perforated well opening sections exist below a to-be-tested oil layer. The tubular column is provided with a full-bore straddling perforation part, a JJ-1 carrier, an RD sampler and other multiple tool systems, straddling perforation, testing, reservoir transformation, testing after transformation and other technology combinations can be conducted, testing before and after transformation, JJ-1 well testing, calculation of production volume and sampling are conducted, and stratum parameters are fully and precisely obtained; besides, on the premise that a decompression cavity is reserved, two ignition modes of bar dropping ignition and parallel explosion-propagation pressure delay ignition are simultaneously set for the tubular column above a perforating gun, the damage of instantaneous high pressure of perforations to down-hole instruments and apparatuses can also be reduced, and fishing, bar dropping and other complicated work after bar dropping ignition fails can also be avoided. By means ofthe technology, the technological process can be simplified, the labor intensity is lowered, the construction period is saved, the construction efficiency is improved, and the success rate is increased.

Description

technical field [0001] The invention relates to the technical field of oil-gas well testing, in particular to a full-diameter spanning perforation-testing combined string and an operating method thereof. Background technique [0002] At present, in the field of oil testing technology of oil and gas wells, the oil testing technology closest to the present invention is "annulus pressurized ignition type straddle perforation-test joint operation" and "span-span test rod perforation joint operation" technology. [0003] The technology of "annulus pressurized ignition straddle perforation-test combined operation" uses two-pole packers, and the perforating gun is placed between the two-pole packers. A bypass-type straddle packer is adopted. The typical feature of the bypass-type straddle packer is that there is a pressure transmission tube inside the bypass packer. The pressure transmission tube transmits the annular pressure to the ignition head, and the pressure transmission tub...

AI Technical Summary

Problems solved by technology

[0005] In view of the fact that there is a perforated well section below the layer to be tested, the existing technology has few functions of the pipe string, difficulty in pulling out the rod after the rod throwing ignition fails, low efficiency, and non-spontaneous well spanning the perforation——difficult to record in real time during the test The object of the present invention is to provide an efficient, convenient and multi-functional full-bore spanning perforation-testing joint operation string and its operation method

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