Abstract: Based on paleotectonic deformation, a methodology including inverse and forward method is used to investigate reservoir paleostress field. The content is (1) Inverse the boundary forces and local stresses of reservoir paleotectonic surface by use of the thin plate trend model. (2) Use the result from (1) asthe boundary condition, and build a combined element model to calculate reservoir paleotectonic stress field. (3) Use the result from (1) as boundary condition, then build a solid element 3D model with active faults to calculate reservoir paleotectonic stress field. (4) Application and inspection of these 3 models.

Key words: Paleostess field, Numerical simulation, Inversion, Plate trend method, Combined element model

摘要： 根据古构造变形采用反演与正演相结合的方法,研究储层古构造应力场。开展以下研究:(1)用板模型趋势法反演与储层古构造变形面对应的驱动力和场内应力;(2)建立一个组合单元模型,用(1)中反演的远场应力作为边界条件,计算储层古构造应力场;(3)用含断层滑动模型的三维实体单元和(1)中给出的边界条件,计算储层古构造应力场;(4)对 3 种模型的应用及其检验。

关键词: 古应力场, 数值模拟, 反演, 板模型趋势法, 组合单元模型