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<p>The fractures developed during the strike-slip faulting activity represent an important type of carbonate reservoir, playing a significant role in ultra-deep oil and gas exploration. At present, the scale and distribution pattern of fractures associated with strike-slip fault in the Shunnan area are unclear. This study focuses on the SB16 fault in the Tarim Basin as the research target, conducting finite element numerical simulations based on 3D seismic interpretation and combined with rock mechanics experiments to clarify the stress field distribution characteristics. Using stress-strain as a bridge, explore the influencing factors and scope of fracture development associated with strike-slip faults, and predict the distribution pattern of fractures. The research results show that in the middle of the Caledonian, the direction of σ<sub>H</sub> is NE18°–NE34°, and the value of σ<sub>H</sub> is 59–66&#xa0;MPa. In the late Caledonian early to Hercynian period, the direction of σ<sub>H</sub> is NW16°–NW32°, and the value of σ<sub>H</sub> is 80–88&#xa0;MPa. The development of fractures in carbonate reservoirs exhibits significant heterogeneity, distributed along strike-slip faults and widely distributed in fault overlap areas. The fractured layers exhibit characteristics of low Young’s modulus and high Poisson’s ratio. The fractures have the largest distribution range in pull-apart segment, the tensile fracture system is conducive to the formation of large-scale reservoirs through fluid transformation. The distribution range of fractures in the uplift segment is second among the three segments, with the fracture system primarily developing along the fault plane. The translation segment has the smallest fracture distribution range, with the fault system developing along the fault plane or its lateral sides.</p>

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In-situ stress field characteristics and fracture prediction of strike-slip fault-controlled carbonate reservoirs in the Shunnan area, Tarim Basin

  • 期刊论文

  • 发表日期：

    2026年6月15日

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  • Teng Zhao,
  • Jibiao Zhang,
  • Yuqing Liu,
  • Zhendong Wang,
  • Zhili Zhu

摘要

The fractures developed during the strike-slip faulting activity represent an important type of carbonate reservoir, playing a significant role in ultra-deep oil and gas exploration. At present, the scale and distribution pattern of fractures associated with strike-slip fault in the Shunnan area are unclear. This study focuses on the SB16 fault in the Tarim Basin as the research target, conducting finite element numerical simulations based on 3D seismic interpretation and combined with rock mechanics experiments to clarify the stress field distribution characteristics. Using stress-strain as a bridge, explore the influencing factors and scope of fracture development associated with strike-slip faults, and predict the distribution pattern of fractures. The research results show that in the middle of the Caledonian, the direction of σH is NE18°–NE34°, and the value of σH is 59–66 MPa. In the late Caledonian early to Hercynian period, the direction of σH is NW16°–NW32°, and the value of σH is 80–88 MPa. The development of fractures in carbonate reservoirs exhibits significant heterogeneity, distributed along strike-slip faults and widely distributed in fault overlap areas. The fractured layers exhibit characteristics of low Young’s modulus and high Poisson’s ratio. The fractures have the largest distribution range in pull-apart segment, the tensile fracture system is conducive to the formation of large-scale reservoirs through fluid transformation. The distribution range of fractures in the uplift segment is second among the three segments, with the fracture system primarily developing along the fault plane. The translation segment has the smallest fracture distribution range, with the fault system developing along the fault plane or its lateral sides.