Tectonic fractures induced by strike-slip faulting in intracratonic ultradeep carbonate rocks: Insights from the finite element method and self-adaptive constraints computational model for boundary conditions

• DOI: 10.1130/b37196.1
• Publication Date: 2024-04-12T19:18:30Z
• Authors: Yuntao Li; Wenlong Ding; Jun Han; Xuyun Chen; Cheng Huang; Jingtian Li; Shihao Ding
• Keywords: Stress field; Tarim basin

Abstract Numerical simulations of the paleostress field during a period tectonic fracture formation and rock failure criteria are used to quantitatively predict development occurrence fractures induced by SB18 fault zone in Middle Ordovician Yijianfang Formation Shunnan area, Tarim Basin, China. The results acoustic emission experiments, mechanical property measurements, observations obtained from core descriptions fullbore microimager logs combined with Andersonian model faulting finite element method, which is widely for numerical simulation stress fields, investigate paleotectonic situ fields via simulation. quantitative prediction opening pressure sequence based on fracture, stresses, coordinate system conversion. show that width strike-slip ~310 m. degree significantly increased when Young’s modulus, difference, difference coefficient elevated. current horizontal principal positively correlated distance fault, elevated areal density secondary faults causes clockwise deflection direction. SSE-striking shear orientations ranging 140° 150° two sets tensional −40° −35° 55° 60° preferentially opened water injection stage reservoir. As coefficient, angle between maximum decrease, decreases. At structural highs (burial depths <6225 m) lows >6225 m), burial depth negatively pressure, respectively. Quantitative developmental characteristics, investigation main factors control their can help identify support opportunities hydrocarbon exploration fractured carbonate reservoirs.