Water control well completion pipe string with tripping-in variable-density screen pipe and continuous packer

Abstract

The invention discloses a water control well completion pipe string with a tripping-in variable density screen pipe and a continuous packer, and the water control well completion pipe string comprises the variable density screen pipe, a quick connector, a positioning extension cylinder, a filling sliding sleeve, a top packer, a mechanical positioner, hydrophobic gravel, a hand releasing tool and a setting tool. At present, the method is only widely applied to an oil field, water control is not achieved in a gas field, hydrophobic gravels and a variable-density screen pipe are combined and tripped into a horizontal section, and compared with the method that only a continuous packer is adopted for controlling water, the variable-density screen pipe is applied to a whole section of a shaft, and the hydrophobic gravels are filled outside the variable-density screen pipe, water control is achieved. The variable-density screen pipe has the advantages that the number of apertures of the variable-density screen pipe can be adjusted according to factors such as reservoir permeability and water conditions, water control is achieved, water breakthrough time can be greatly prolonged, formation water coning is prevented, the stable production period is prolonged, the water control and sand control effects are more obvious, and meanwhile, a referable scheme method is provided for deepwater gas reservoir well cementation and completion.

Description

technical field [0001] The invention relates to the technical field of water control in oil and gas field development, in particular to a water control well completion pipe string run into a variable density screen and a continuous packer. Background technique [0002] The future development of marine resources exploration will focus on the vast ultra-deep waters. my country's deepwater oil and gas resources in the South China Sea are mainly developed for conventional deepwater wells with a water depth of less than 1,500 meters, and there is no involvement in ultra-deepwater areas. In November 2015, the well LS-X-1 was successfully tested in a block in the Qiongdongnan Basin of the South China Sea. The water depth of the well exceeded 1,600 meters, and it was a truly ultra-deep well in my country. In deepwater gas well testing, how to control water invasion is a major problem in the production process. In the production process, water intrusion is an inevitable result with...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a water control completion pipe string run into a variable density screen and a continuous packer, so as to solve the problem that the density and viscosity of water are greater than that of gas, so that the fluid cannot be used. Inertial force and viscous resistance control the ICD disc to suppress water flow, so ICD water control technology is only widely used in oil fields at present, and has not been applied in gas fields to realize water control. Only a few domestic and foreign articles have carried out simulation analysis of ICD water control effect, but still Lack of improvement or clarification of the water control mechanism

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