Fracturing well completion method

Abstract

The invention discloses a fracturing well completion method. The method is applied to the reservoir exploitation of low permeability oil and gas reservoirs, tight oil or shale oil and the like. The method comprises the steps that a light drive pipe is adopted to perform fracturing, a spile bridge plug is prefabricated in a well shaft above a production layer using a constant oil pipe after fracturing is conducted, the bridge plug is used for isolating the reservoir in pump lowering well completion or subsequent pump inspection operation process to prevent external liquid from contacting the reservoir, and a sealing plug at the bottom of a production column is used for switching on and off a production pipeline in the bridge plug. Fracturing needs to be conducted on the low permeability oiland gas reservoirs, the tight oil or the shale oil to obtain industrial oil gas flow, if conventional operation is conducted, well killing needs to be conducted in the pump lowering or pump inspection operation process, well killing liquid in the well shaft easily enters a stratum to damage the stratum, and the yield after fracturing is conducted is reduced. If pressurizing operation is conducted, the problems of long construction period and high cost exist, and an electric pump cannot be lowered during pressuring operation. The method overcomes the defects of the conventional operation and the pressurizing operation, and efficient exploitation of the low permeability oil and gas reservoirs is achieved.

Description

technical field [0001] The invention relates to an integrated fracturing and well completion process for oil and gas field development and application, in particular to a fracturing and well completion process, which can greatly improve oil and gas reservoirs that require fracturing to develop, such as low permeability, tight oil, and shale oil. Reduce the pollution to the reservoir during post-fracturing operations and maximize production. Background technique [0002] With the development of shale oil, tight oil and low-permeability reservoirs, fracturing technology has been applied more and more, and fracturing stimulation technology has become a necessary means to develop low-permeability and unconventional oil and gas reservoirs. Due to the relatively low pressure in low-permeability reservoirs, artificial lift (pumping or gas lift) is often used for production. At present, the method of pumping down after well killing is generally used after fracturing, which will poll...

AI Technical Summary

Problems solved by technology

Due to the relatively low pressure in low-permeability reservoirs, artificial lift (pumping or gas lift) is often used for production. At present, the method of pumping down after well killing is generally used after fracturing, which will pollute the oil and gas layers and will greatly Reduced production after fracturing

If the operation under pressure is used, the electric pump cannot be lowered, and there are problems of high well control risk and high cost