In the Futai carbonate oilfield of the Jiyang Depression, Bohai Bay Basin, oil enrichment is significantly related to fracture development during the oil production process. In this research, by methods of core observation and image logging interpretation, the tectonic fractures’ characteristics were distinguished. Numerically, through the elastoplastic mechanics method of finite element (FE) simulation, the three-dimensional (3-D) paleotectonic stress field (two key fracture-generating periods) and the current stress field in the Futai buried hill were quantitatively simulated. The equations between fracture parameters and tectonic stresses were deduced to predict the fracture distribution and development in various periods. Simultaneously, through the mechanical superposition algorithm, the fracture parameters under the present conditions were simulated by modifying the current stress field from preexisting fractures. The results indicated that: (1) The Yanshanian maximum principal stress ranged from −85 MPa to −435 MPa in the NWN-SES (344°) (343°–164°) direction. (2) The Himalayan minimum principal stress ranged from 5 to 30 MPa in the NWN–SES direction. (3) The fracture formation during the Yanshanian and Himalayan orogeny was primarily influenced by the regional stress field in the Jiyang Depression or the secondary stress field derived from the Tanlu fault zone, followed by the lithology. The current fracture porosity was primarily controlled by fold, followed by the large faults oriented by N–S direction and then by the secondary faults oriented by E-W direction. With successful calculations, the developed 3-D FE geomechanical modeling and fracture parameter calculation method holds great promise for characterizing fractures in other carbonate reservoirs.

在渤海湾盆地济阳De陷的富台碳酸盐岩油田，油的富集与采油过程中裂缝的发育显着相关。本研究通过岩心观察和图像测井解释的方法，区分了构造裂缝的特征。在数值上，通过有限元模拟的弹塑性力学方法，定量地模拟了富台潜山的三维（3-D）古构造应力场（两个关键的断裂发生期）和当前应力场。推导了裂缝参数与构造应力之间的方程，以预测不同时期的裂缝分布和发展。同时，通过机械叠加算法，通过修改现有裂缝的当前应力场，模拟了当前条件下的裂缝参数。结果表明：（1）NWN-SES（344°）（343°–164°）方向的燕山期最大主应力范围为-85 MPa至-435 MPa。（2）喜马拉雅在NWN–SES方向上的最小主应力范围为5到30 MPa。（3）燕山期和喜马拉雅造山带的裂缝形成主要受济阳De陷的区域应力场或or庐断裂带的次生应力场的影响，其次是岩性。当前的裂缝孔隙度主要由褶皱控制，其次是由ＮＳ方向定向的大断层，然后是由ＥＷ方向定向的次生断层。通过成功的计算，