Citation: | LIU Jiageng, LI Jing, SU Yuliang, FAN Zuosong, LIU Xuliang, GUO Hao. 2020. Tectonic stress field research on the Ordovician reservoirs in the Tahe Oilfield. Journal of Geomechanics, 26(1): 48-54. doi: 10.12090/j.issn.1006-6616.2020.26.01.005 |
The distribution characteristics of tectonic stress field in carbonate reservoir are of great significance to the study on oil and gas migration law, reasonable arrangement of injection-production pattern, reservoir transformation, etc. In this paper, starting with the geological tectonic evolution of the Well Block AD13 in the Tahe Oilfield, based on the well logging data, combined with elasticity and finite element theory, the elastic mechanics computational model of crustal stress in the research area is established and the reservoir crustal stress in the research area is simulated by using the finite element software, then the calculated results are compared with the measured values of crustal stress. The results indicate that the maximum horizontal principal stress is 102~130 MPa, the minimum horizontal principal stress is 87~110 MPa, all expressing as compressive stress. The direction of maximum horizontal principal stress in the east and south, northwest, and southwest of the research area are NE, NEE and SE, respectively. The magnitude and direction of crustal stress are consistent with the actual results. The research results can provide a scientific basis for oil and gas exploration and development engineering in the research area.
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The top structural distribution map of the Well Block AD13 in middle-bottom Ordovician
The variation curves of the Ordovician formation pressure in the Well Block AD13
The finite element mesh graph of the Well Block AD13 model
The maximum horizontal stress pattern of the Well Block AD13
The minimum horizontal stress pattern of the Well Block AD13
The crustal stress direction pattern of the Well Block AD13