Open hole segmented acid fracturing easy-to-drill well completion production tubular column and working method thereof

Abstract

The invention discloses an open hole segmented acid fracturing easy-to-drill well completion production tubular column and a working method thereof. The open hole segmented acid fracturing easy-to-drill well completion production tubular column comprises an oil pipe, a packer, an easy-to-drill releasing device, an easy-to-drill oil pipe, easy-to-drill packer sieve tube sliding sleeve groups, an easy-to-drill setting ball seat and an easy-to-drill floating shoe which are sequentially connected from top to bottom. Each easy-to-drill packer sieve tube sliding sleeve group comprises an easy-to-drill open hole packer, an easy-to-drill temporary plugging sieve tube and an easy-to-drill fracturing sliding sleeve which are connected from top to bottom, and the number of the easy-to-drill packer sieve tube sliding sleeve groups is at least one. Each easy-to-drill temporary plugging sieve tube comprises a base pipe, a coupling and soluble plugs, wherein the base pipe adopts a circular pipe column, holes are uniformly drilled in a pipe body of the base pipe, and the soluble plugs are arranged in the holes and tightly connected and fixed to the holes. A check valve is arranged in the easy-to-drill floating shoe. According to the open hole segmented acid fracturing easy-to-drill well completion production tubular column and the working method thereof, rapid and convenient drilling treatmentcan be realized, a well wall can be effectively supported, pipe column sand burial caused by the collapse of the well wall is prevented, various designs are provided for the internal structure, and different requirements are met.

Description

technical field [0001] The invention relates to the technical field of well completion engineering, in particular to a well completion pipe string, in particular to an open-hole segmented acid fracturing easy-drilling well completion production pipe string and a working method thereof. Background technique [0002] In Ordovician carbonate reservoirs, the reservoirs are deeply buried, the formation pressure and temperature are high, and the productivity of oil and gas wells varies greatly. Only about 30% of new wells can be drilled in the fracture-cavity development zone and put into production directly, and more than 70% of the wells need to go through Reservoir transformation can be completed. Carbonate reservoirs generally have serious problems of reservoir development heterogeneity. Practice has proved that for reservoirs with multiple reservoir development intervals, by using open hole packers and supporting tools for layered and segmented stimulation, It has a very goo...

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Problems solved by technology

The problems of this kind of completion string mainly include the following aspects: (1) Due to the general need to drill and grind the completion string in the late stage of carbonate reservoirs to achieve the purpose of sidetracking, reconstruction and deepening, and The current layered and segmented completion strings have long drilling and grinding time, high risk, difficult packer handling, and high operating costs; (2) oil and gas can only enter the completion string from the sliding sleeve tool in each section, and oil and gas The production flow area is small, and after wellbore collapse occurs in the reservoir (wellbore collapse is common in carbonate reservoirs), it is easy to bury the sliding sleeve tool in sand, blocking the flow channel of oil and gas, resulting in a decline in production

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