A kind of treatment method of tight oil and gas well air lock
A processing method and technology for oil and gas wells, which are used in earth-moving drilling, wellbore/well components, and production fluids, etc., can solve the problems of short validity period and no solutions, and achieve the effect of improving the effective time rate
Active Publication Date: 2018-02-02
PETROCHINA CO LTD
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Problems solved by technology
[0006] These technologies aimed at preventing gas lock in conventional oil and gas production have a short validity period after being applied in tight oil and gas wells, and there is no effective solution for tight oil and gas wells after gas lock
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[0019] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0020] Taking Well Shun 1 as an example, a solution to gas lock in tight oil and gas wells of the present invention is further described in detail.
[0021] See attached figure 1 . The present invention provides a solution to the gas lock of dense oil and gas wells, comprising: wellhead small cross 1, rubber valve 2, 250 type Christmas tree special valve 3, 250 type christmas tree special valve 4, 250 type christmas tree special valve 5, wellhead Large four-way 6, back pressure valve 7, oil collection pipeline 8, oil pressure gauge 9, back pressure gauge 10, heart filling 11, monk head 12, monk head 13.
[0022] 1. Judgment of air lock. At the wellhead of Well Shu 1, observe the pressure changes of the oil pressure gauge and the bac...
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The invention discloses a method for treating gas locks in tight oil and gas wells, and belongs to the technical field of petroleum exploitation. The method includes: closing the 250-type christmas tree special valve connected with the small cross at the wellhead and the oil gathering pipeline by relying on the monk head after determining that the air lock occurs; Control the opening and closing of the 250-type Christmas tree valve according to the difference between the pressure values shown on the oil pressure gauge and the back pressure gauge until the pressure on the oil pressure gauge is 2.0MPa-2.5MPa higher than the pressure on the backpressure gauge The 250-type Christmas tree special valve connecting the small cross at the wellhead and the oil-gathering pipeline; the oil well is in normal production, and the gas-locking phenomenon of the oil well is resolved. Technicians or operators can solve the problem of air lock at the wellhead, satisfying the normal production of tight oil and gas wells, and increasing the effective time rate by more than 50%.
Description
technical field [0001] The invention relates to the technical field of petroleum exploitation, in particular to a method for treating tight oil and gas well gas locks. Background technique [0002] Tight oil and gas found in dark gray mudstone, oil shale, and gypsum mudstone of Shahejie Formation in Shulu Sag, Jizhong. The marl has well-developed fractures, low pressure bearing capacity, active oil and gas, and well leakage is prone to occur during construction, resulting in that after fracturing, the fracturing fluid cannot be flowed back, and the success rate of gas lift alternate spraying is low. A tubular pump with an air anchor needs to be lowered into the well for liquid drainage and oil (gas) recovery, but often causes the tubular pump to be air-locked. [0003] Sun Shuang published the article "Development of Long Plug Ring Sealing Gas and Sand Control Oil Pump" in the 10th issue of "Petroleum Machinery" in 2010, aiming at the current problems in solving the problem...
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IPC IPC(8): E21B43/00
Inventor 付亚荣蒋伟彪马永忠刘春平李小永姚庆童李冬青付丽霞谢荣婕罗金洋朱瑞彬宋贾利李春燕陆燕张延彬祝庆山
Owner PETROCHINA CO LTD