Fracturing well completion method

A process method and fracturing technology, which is applied in the direction of earthwork drilling, wellbore/well components, production fluid, etc., can solve the problems of reducing fracturing production, pollution of oil and gas layers, and high cost, so as to reduce pumping pressure and improve drainage. volume, the effect of increasing production

Inactive Publication Date: 2018-11-23
CNPC BOHAI DRILLING ENG
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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, whi

Method used

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Embodiment Construction

[0020] The present invention is described in further detail below:

[0021] The fracturing well completion process method of the present invention adopts the following steps to implement:

[0022] 1) Install the fracturing wellhead, run the coiled tubing with the flushing head into the well, use clean water or slick water to replace the mud in the well, and then pull out the coiled tubing. Connect the bottom of the tubing with the well gauge down to the bottom of the artificial well, and check after pulling out. If the well gauge is normal, reconnect and scrape and run in again, and scrape repeatedly at the position where the bridge plug needs to be set. After the coiled tubing is taken out of the scraper, the pressure test of the whole wellbore is carried out, and the next step is carried out after the pressure test is passed.

[0023] 2) Use coiled tubing or cable to transport the perforating gun, carry out perforation according to the requirements of ground pressure or ele...

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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...

Claims

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Application Information

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IPC IPC(8): E21B43/26
CPCE21B43/26
Inventor 王林张世林陶卫东曹宁刘泽宇赵玉东郝桂现刘春龙
Owner CNPC BOHAI DRILLING ENG
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