A quantitative prediction of sand production from gas wells based on the effect of stress field around the borehole

被引：0
|
作者：
Li, Zhandong [1 ,2 ,3 ]
Pang, Hong [3 ]
Xu, Jinze [4 ]
Li, Zhong [5 ]
Zhang, Haixiang [1 ,2 ,3 ]
Wang, Dianju [1 ,2 ,3 ]
机构：
[1] Heilongjiang Key Laboratory of Gas Hydrate Efficient Development, Daqing,Heilongjiang,163318, China
[2] College of Offshore Oil & Gas Engineering, Northeast Petroleum University, Daqing,Heilongjiang,163318, China
[3] College of Petroleum Engineering Institute, Northeast Petroleum University, Daqing,Heilongjiang,163318, China
[4] Department of Chemical and Petroleum Engineering, University of Calgary, Calgary,AB,T2N 1N4, Canada
[5] CNOOC China Limited Zhanjiang Branch, Zhanjiang,Guangdong,524000, China
来源：
Zhongguo Kuangye Daxue Xuebao/Journal of China University of Mining and Technology | 2020年 / 49卷 / 03期
关键词：
For the importance of sand control in gas wells; based on data from the Xujiaweizi gas field in the Songliao Basin; this article studies the formation of sand under in-situ stress during production. Under 4 assumptions; from the perspective of formation stress; a theoretical model of sand production prediction for gas wells under the action of peri-well stress was established. It is considered that sand production during production extends not only on the well wall but to a certain range around the well. Sand production within the sand production radius under plastic failure conditions. Based on the stress distribution around the well; the sand production radius of the gas well is calculated according to the rock failure criterion. The sand production volume of the gas well at the fixed production rate is calculated based on the fluid seepage law in the sand production radius. The research results showed that; in terms of changes in stress distribution; the radial effective stress; circumferential effective stress; and axial effective stress distribution change periodically with the circumferential angle; and the actual size is related to the original in-situ stress distribution in the area. The effective circumferential stress of well X1 varies greatly with the circumferential angle; and the range is 24.49 MPa; the range of effective radial stress is 1.99 MPa; and the range of effective axial stress is 6.62 MPa. The critical radius of sand production is closely related to the stress around the well. As the distance from the well axis increases; the combined effect of formation stress can no longer meet the rock failure criterion; and the rock no longer breaks under the stress of the place. The sand production radius of well X1 is 0.137 m. It can be considered that the rocks around the well in the range of more than 0.137 m do not break up and produce sand under the effect of formation stress. The model has a good prediction of sand production in the initial stage of gas well production; and the error of sand production in the well is within an acceptable range of 2.6%; which indicates that the model has a good prediction effect on sand production in the early stage of gas reservoir production. © 2020; Editorial Board of Journal of CUMT. All right reserved;
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页码：523 / 529
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