Final sand-proofing method for oil-gas well
A technology for oil and gas wells and oil wells, which is applied in the direction of earthwork drilling, wellbore/well components, production fluids, etc. It can solve the problems of poor adaptability and economic benefits of oil and gas wells, and the purpose of sand control is not clear, so as to improve oil recovery efficiency and The effect of oil recovery quality and service life extension
Inactive Publication Date: 2006-08-16
INST OF MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology
The sand control methods currently used generally include natural sand arch sand control and mechanical sand control. These sand control methods have their own adaptability, and there are certain problems in sand control benefits, especially for the adaptability and economic benefits of oil and gas wells with multi-layer mixed production. Worse, the key problem is that all single-stage sand control methods are used, and the purpose of sand control is not clear
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[0008] Such as figure 1 As shown, the oil and / or gas production layers 1, 2, 3, 4, and 5 are non-production layers, and the present invention arranges a filter pipe 10 at the inlet end of the oil pump 9 of the wellbore 8, so that the oil and / or gas flow from When the wellbore 8 enters the oil pipe 7, it is well filtered, which can prevent the sand particles from jamming the oil pump 9, and can also greatly reduce the abrasion of the sand particles to the oil pipe 7. In the past, due to people's long-term ignorance and prejudice to this problem, this problem has not been solved. The present invention breaks people's prejudice, and oil is filtered before entering the oil pump 9 . Thus, the oil production efficiency and quality are greatly improved.
[0009] Of course, the present invention can also be applied to different well structures such as deviated wells and horizontal wells.
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A method of prevent granulated substance in late oil or gas well, that is set filter pipe at the entrance of the oil pump which can filtrate granulated substance again before enter it, therefore this invention is not only improve the quality and efficiency of the oil and gas, but also extend the lifespan of the extraction equipment.
Description
technical field [0001] The invention relates to a sand control method for oil and gas wells. Background technique [0002] During the exploitation of oil and gas fields, formation sand production is a common problem, especially in the production of unconsolidated oil and gas formations, sand production is unavoidable for mixed oil and gas wells or mixed water injection wells. The hazards of sand production in the formation include: 1) wear of downhole and surface equipment and affect the life of the well; 2) sand particles stuck in the pump, affecting normal production and other aspects. These problems have been widely manifested in the development of oil and gas fields. The currently used sand control methods generally include natural sand arch sand control and mechanical sand control. These sand control methods have their own adaptability, and there are certain problems in sand control benefits, especially for the adaptability and economic benefits of oil and gas wells wi...
Claims
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Login to View More IPC IPC(8): E21B43/02E21B43/08
Inventor 刘曰武江同文朱卫红项建民郑威白晓飞常泽亮
Owner INST OF MECHANICS - CHINESE ACAD OF SCI