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A coiled tubing multi-cluster blasting perforation fluid recovery method and recovery device

A technology of sandblasting perforating and recycling methods, which is applied in separation methods, chemical instruments and methods, and earthwork drilling and mining, etc., can solve the problems of complicated operation, long time consumption, inability to realize the recycling of perforating fluid, etc., and achieve a simple process and process. , the effect of reducing costs and low operating costs

Active Publication Date: 2018-02-13
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0005] The purpose of the present invention is to provide a coiled tubing multi-cluster sandblasting perforating fluid recovery method and recovery device to solve the problems of complex operation, long time consumption and inability to realize the recycling of perforating fluid in the current recovery process of sandblasting perforating fluid question

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  • A coiled tubing multi-cluster blasting perforation fluid recovery method and recovery device
  • A coiled tubing multi-cluster blasting perforation fluid recovery method and recovery device
  • A coiled tubing multi-cluster blasting perforation fluid recovery method and recovery device

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Embodiment Construction

[0027] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0028] Embodiment of a method for recovering liquid from multi-cluster injection holes in coiled tubing of the present invention

[0029] The coiled tubing multi-cluster injection hole fluid recovery method of the present invention can realize the recovery and utilization of perforating fluid in the coiled tubing bottom seal dragging fracturing reconstruction process of casing cementing and completion horizontal wells, reduce sewage discharge and improve economic benefits . In this method, in the replacement liquid recovery stage, the valve of the replacement liquid recovery tank is opened, and the replacement liquid is recycled into the replacement liquid recovery tank; in the sandblasting liquid recovery stage, the valve of the sandblasting liquid recovery tank is opened, and the The liquid is recovered to the sandblasting liquid recovery...

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Abstract

The invention relates to a recovery method and a recovery device for multi-cluster sandblasting perforation fluid in coiled tubing, and belongs to the technical field of petroleum exploration and development. In the replacement liquid recovery stage, the present invention opens the valve of the replacement liquid recovery tank, and recovers the replacement liquid into the replacement liquid recovery tank for use in the next cluster of perforations; in the sandblasting liquid recovery stage, opens the sandblasting The valve of the liquid recovery tank is used to recycle the sandblasting liquid into the sandblasting liquid recovery tank for static settlement; after the sandblasting liquid in the sandblasting liquid recovery tank is left to settle for a set time, the sandblasting liquid in the sandblasting liquid recovery tank The sand-free base fluid is transferred to the replacement fluid recovery tank for use in the next cluster of perforations. The invention achieves recovery by alternately using the recovery tanks to settle the perforating sand in the sandblasting fluid, the flow process is simple, no chemical agent is added in the whole treatment process, the operation cost is low, the construction efficiency is high, and the sandblasting fluid and replacement fluid can be realized The effective recovery of perforating fluid reduces the cost of perforating fluid and improves economic benefits.

Description

technical field [0001] The invention relates to a recovery method and a recovery device for multi-cluster sandblasting perforation fluid in coiled tubing, and belongs to the technical field of petroleum exploration and development. Background technique [0002] At present, domestic horizontal well casing staged fracturing technologies are mainly coiled tubing staged fracturing and drillable bridge plug staged fracturing. The coiled tubing staged fracturing process uses coiled tubing to perform sandblasting and perforation, and injects fracturing into the annulus of the oil casing. The amount of liquid used for each cluster of perforation in this process includes low replacement, sandblasting perforation, displacement, etc. is close to 30 cubic meters. After these fluids return to the wellbore, due to the mixture of base fluid and sand-carrying fluid, it is difficult to reuse them in the current construction process, and they are all pulled back as waste fluids, resulting in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B41/00B01D21/00
Inventor 王越李嘉瑞李克智何青陈付虎李国锋罗懿张永春高志军邱小庆
Owner CHINA PETROLEUM & CHEM CORP
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