Multi-cluster perforating and fracturing completion pipe string and construction method

Abstract

The invention relates to a multi-cluster perforating and fracturing completion pipe string and construction method. The pipe string is composed of a completion pipe string body, a well cementation rubber plug, a plurality of blockers, a multi-cluster perforating gun and a cable. The completion pipe string body is formed by sequentially connecting a float shoe, a float collar, an explosion valve and a plurality of preset ball seats through a casing pipe, and the well cementation rubber plug is located at the upper end of the float collar in the well cementation work later period; the outer diameters of the blockers are sequentially increased according to grades, and the blockers are inserted in the preset ball seats respectively; and the multi-cluster perforating gun is connected with the tail ends of the blockers, and the tail end of the multi-cluster perforating gun is connected with the cable. The method comprises the steps that firstly, the completion pipe string body is sent to the designated position inside a naked-eye shaft; well cementation work is carried out; and first-stage fracturing work, second-stage fracturing work, third-stage fracturing work, fourth-stage fracturing work and fifth-stage fracturing work are sequentially completed. The pipe string and the construction method are applicable to multi-cluster perforating and fracturing construction of the shale oil and gas reservoir layer.

Description

technical field [0001] The invention relates to a completion pipe string and a construction method, in particular to a multi-cluster perforation fracturing completion pipe string and a construction method. The pipe string and the construction method of the invention are suitable for fracturing reconstruction of shale oil and gas reservoirs. Background technique [0002] At present, the development of shale oil and gas reservoirs in China is in its infancy, and there is a big gap with foreign countries. Many technical bottlenecks restricting the development of shale oil and gas in my country need to be broken through. Multi-cluster perforation fracturing is one of the important means of fracturing for shale oil and gas reservoirs. At present, the commonly used technical methods include: using coiled tubing or cables to transport multi-cluster perforating guns and drillable bridge plugs into the wellbore, and the drillable bridge plugs seal the wellbore before perforating and...

AI Technical Summary

Problems solved by technology

[0003] In view of the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is to provide a multi-cluster perforation fracturing completion string and a construction method to solve the complex process and high construction difficulty in the multi-cluster perforation fracturing process. , the problem of high cost, realize the purpose of multi-cluster perforation and fracturing stimulation of shale oil and gas reservoirs in a simple way

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