Horizontal well cementation sliding sleeve partial pressure pipe outer optical fiber system and monitoring method thereof

Abstract

The invention provides a horizontal well cementation sliding sleeve partial pressure pipe outer optical fiber system and a monitoring method thereof. The horizontal well cementation sliding sleeve partial pressure pipe outer optical fiber system comprises a plurality of casing pipes, a plurality of fracturing sliding sleeves and a monitoring optical cable, the casing pipes are connected with the fracturing sliding sleeves, the multiple casing pipes and the multiple fracturing sliding sleeves are connected end to end to form a fracturing string, the fracturing sliding sleeves are provided withsand blasting openings, the sand blasting openings are opened so that fracturing fluid in the fracturing string is sprayed out from the sand blasting openings, and fracturing operation is conducted ona target reservoir of a horizontal well after well cementation operation. The monitoring optical cable is arranged on the outer surface of the fracturing string so as to enter the horizontal well along with the fracturing string and monitor flow information at the position of the sand blasting opening of each fracturing sliding sleeve in real time. The problems that in the prior art, in the process of conducting subdivision cutting and volume fracturing operation on a horizontal well, flow information at the position of a sand blasting opening of a fracturing sliding sleeve cannot be obtained, and the fracturing effect cannot be evaluated are solved.

Description

technical field [0001] The invention relates to the field of oil and gas field development downhole fracturing pipe strings and testing technologies, in particular to an optical fiber system outside a horizontal well cementing sliding sleeve pressure dividing pipe and a monitoring method thereof. Background technique [0002] In the prior art, during the subdivision cutting and volume fracturing operation of horizontal wells, the flow information at the sandblasting ports of the fracturing sliding sleeves in each section and cluster of the staged fracturing device cannot be obtained, resulting in The operator cannot accurately obtain the opening information of the sandblasting port, and even cannot obtain the output information of the sandblasting port in the subsequent production stage. Contents of the invention [0003] The main purpose of the present invention is to provide a monitoring method for the optical fiber system outside the pressure dividing pipe of the horizo...

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Problems solved by technology

[0003] The main purpose of the present invention is to provide a monitoring method for the optical fiber system outside the pressure dividing pipe of the horizontal well cementing sliding sleeve and its monitoring method, so as to solve the process of subdividing and cutting the horizontal well and volume fracturing in the prior art. In the process, the flow information at the sandblasting port of the fracturing sleeve cannot be obtained, and the fracturing effect cannot be evaluated

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