Pulse horizontal well volume fracturing device and horizontal well volume fracturing method

Abstract

The invention relates to the technical field of oil and gas field exploitation, and provides a pulse horizontal well volume fracturing device and a horizontal well volume fracturing method. The devicecomprises a coiled tubing, a horizontal section of the coiled tubing is sequentially connected with a connector, a motor head assembly, a centralizer, a pulse tool, an ejector, a positioner and a guide shoe, and the pulse tool, the ejector, the positioner and the guide shoe can generate a high-pressure fluid body. The method comprises the following step of (1) drilling down and determining a perforation position. According to the device and the method, the structure is reasonable and compact, the use is facilitated, through the arrangement, the disassembled and assembled can be quickly achieved, the construction cost can be reduced, a pulse fluid body can be generated by the pulse tool, the pulse fluid body can improve the perforation efficiency during volume fracturing through a nozzle,the generation of micro-cracks in a perforation hole eyelet can be increased, the energy increasing in the perforation hole eyelet is realized, cracks is quickly formed on stratum, the construction pressure is reduced, and the device and the method solve the problem that a traditional volume fracturing reforming technology is relatively limited in a method of reforming a target layer section whenformation fracture pressure is high.

Description

technical field [0001] The invention relates to the technical field of oil and gas field exploitation, and relates to a pulse horizontal well volume fracturing device and a horizontal well volume fracturing method. Background technique [0002] With the promotion and popularization of downhole operation technology of coiled tubing, more and more coiled tubing has been applied to the downhole operation site of oil and gas fields. To meet the needs of on-site refined operations, one of the important reasons is that the utilization rate of the pressure energy of the ground pumped fluid is not high. Increasing the hydraulic energy at the bottom of the well or improving its utilization rate is of great significance to improve the operation efficiency and effect. At present, the main way to generate fluid pulse pressure at the bottom of the well is to use a special structure to realize fluid flow resistance changes or periodic vibrations at the bottom of the well, but it cannot fu...

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Problems solved by technology

[0003] The present invention provides a volumetric fracturing device for pulsed horizontal wells and a volumetric fracturing method for horizontal wells, which overcomes the deficiencies of the prior art and can effectively solve the problem of unreasonable bottom-hole hydraulic energy matching, inaccurate injector positioning, and traditional volumetric fracturing. The relatively limited problem of fracturing reform method

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