Abstract:In this paper, 17 scenes TerraSAR-X radar images acquired from August 2013 to August 2014 are used by the small baseline subset (SBAS) InSAR method to obtain the surface deformation series during the operation of underground gas storage (UGS) in Hutubi (HTB). We combine these data with data from injection/production pressure wells, using multi-point source Mogi model to simulate the deformation field of UGS in Hutubi. The results show that the deformation characteristics of the whole UGS area is a discontinuous distribution, and the deformation peak value along satellite line of sight (LOS) is 10 mm and -8 mm during gas injection and gas production respectively. The retrieved deformation sequences conform to injection/production pressure changes very well. Based on the multi-point source Mogi model, we simulate the deformation process of HTB UGS and apply an adaptive forward search method to obtain the radius and depth of point source. The simulated results indicate that when the injection/production average pressure of HTB UGS is 18 MPa and 15 MPa, LOS deformation is up to 7 mm and -4 mm respectively; surface deformation is related to the density of gas injection/production wells. The UGS gas distribution is not uniform, indicating that the structure of underground gas storage is complex.
CHEN Wei,YU Pengfei,XIONG Wei et al. InSAR Deformation Monitoring and Simulation of Underground Gas Storage in Hutubi, Xinjiang[J]. jgg, 2016, 36(9): 803-807.