Sandblasting and perforating fracturing method for perforated production wells
A technology of sand blasting perforation and production wells, which is applied in the direction of earthwork drilling, wellbore/well components, and production fluids, etc., which can solve the problems of high cost and long construction period, so as to reduce construction cost, shorten construction period, improve The effect of single well production
Active Publication Date: 2022-06-03
PETROCHINA CO LTD
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Problems solved by technology
[0005] Existing spray guns can only open the sliding sleeve of one spray gun at a time to expose the nozzle. When performing sandblasting and perforation fracturing on multiple target layers, it is necessary to pump the ball multiple times to open the sliding sleeve of each spray gun in turn. The existing sandblasting and perforating fracturing process has a long construction period, a large amount of liquid required, and high costs
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[0080] In order to make the technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Unless otherwise defined, all technical terms used in the embodiments of the present invention have the same meaning as commonly understood by those skilled in the art.
[0081] Embodiments of the present invention provide a sandblasting and perforating fracturing method for perforated production wells, see figure 1 , and combine Figure 2 to Figure 6 , the sandblasting and perforating fracturing method includes the following steps:
[0082] Step S11, run the sandblasting, perforating and fracturing string to a preset position of the casing 200 of the perforated production well. A plurality of spray guns 100 are arranged in the sandblasting, perforating and fracturing string. A spray gun that throws the ball through and the nozzle 4 can be turned on afte...
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The invention discloses a sand blasting perforation fracturing method for perforated production wells, which belongs to oil reservoir fracturing production. The method comprises the following steps: running the sandblasting perforation fracturing string into the preset position of the casing of the perforated production well, the sandblasting perforation fracturing string is provided with a plurality of spray guns, and the spray guns can be used A spray gun that passes the ball and the nozzle can be opened after a preset time period after the ball passes; throw a ball into the oil pipe, and open the nozzles of each spray gun in turn; inject perforating fluid into the oil pipe with the preset perforation displacement, and shoot open Casing: inject sand-carrying fluid into the tubing, inject base fluid into the annulus of the casing and tubing, and perform fracturing on each target layer. The cracking pressure difference between them. By adopting the sandblasting and perforating fracturing technology provided by the embodiment of the present invention, fixed-point and precise fracturing can be performed on old wells that have been produced by perforation, tap the potential of low or undeveloped oil layers, and increase the production of a single well.
Description
technical field [0001] The invention relates to the technical field of oil reservoir fracturing and exploitation, in particular to a sandblasting and perforating fracturing method for perforated production wells. Background technique [0002] Sandblasting and perforating fracturing of perforated production wells to tap the potential of low-producing or unproduced oil layers is an effective means to improve the recovery rate of perforated production wells. [0003] At present, the perforated production wells mainly adopt the sandblasting and perforating fracturing process of the immobile string for sandblasting and perforating fracturing. In the sandblasting and perforating fracturing process of the immovable pipe string, multiple spray guns are connected through oil pipes, and the multiple spray guns are lowered into the designed spray positions of different target layers. It is sprayed from the nozzle to perform sandblasting and perforating fracturing on the target layer. ...
Claims
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IPC IPC(8): E21B43/114E21B43/26
CPCE21B43/114E21B43/26
Inventor 贾云鹏程运甫张胜传陈紫薇付大其刘学伟赵玉东
Owner PETROCHINA CO LTD