Journal of Southwest Petroleum University(Science & Technology Edition) ›› 2022, Vol. 44 ›› Issue (5): 23-34.DOI: 10.11885/j.issn.1674-5086.2021.01.11.02

• GEOLOGY EXPLORATION • Previous Articles     Next Articles

Monitoring of Long Time Series Deformation in Karamay Oilfield Based on SBAS-DInSAR

YU Bing1,2,3,4,5, SHE Jie1,6, ZHAO Jinzhou2, ZHANG Guo4, ZHOU Zhiwei5   

  1. 1. School of Civil Engineering and Geomatics, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
    2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
    3. Institute of Petroleum and Natural Gas Spatial Information Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
    4. State Key Laboratory of Information Engineering in Surveying, Mapping & Remote Sensing, Wuhan University, Wuhan, Hubei 430079, China;
    5. State Key Laboratory of Geodesy and Earth's Dynamics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan, Hubei 430077, China;
    6. Water Conservancy Development Center of Anzhou District, Mianyang, Sichuan 622650, China
  • Received:2021-01-11 Published:2022-10-28

Abstract: The authors obtain the annual average deformation rate and long time series deformation of the Karamay Oilfield with SBAS-DInSAR and then determine the high deformation area by taking into account the mean and standard deviation. By analyzing the results of the deformation gradients from west to east and from north to south, the cumulative deformation variables of equal time interval, the proportions of high deformation areas and the deformation trend of the characteristic points, it is found that the deformation area is highly consistent with the oil exploitation areas, and the deformation is more likely to take place during oil production and water and gas injection. Besides, the deformation is inhomogeneous in space and nonlinear in time and its overall trend in the study continues to change. Finally, the diversity reflected in the cumulative deformation of feature points is closely related to the surface features. The above results show that it is of great feasibility to apply SBAS-DInSAR to monitor long term nonlinear oilfield deformation.

Key words: Karamay Oilfield, surface deformation monitoring, SBAS-DInSAR, nonlinear deformation, oilfield exploitation, long time series

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