海拉尔盆地三维地应力场数值模拟

3D NUMERICAL SIMULATION OF IN-SITU STRESS FIELD IN HAILER BASIN

为了向压裂井提供井点周围及局部构造的地应力，在分析海拉尔希3区块地质特征和实际资料的基础上，通过建立合理的地质模型、力学模型和数学模型，采用有限元约束优化反演法，完成了海拉尔希3区块三维地应力场的数值模拟。计算出该区块南一段油层顶部最大水平主应力集中分布在44～51MPa，最小水平主应力集中分布在37～42MPa，并得出了该区块横向及纵向地应力分布，为油田井网部署及压裂工艺设计提供了依据。

To provide fracturing well the terrestrial stress of local structure and around the well, with optimized in- version method constrained by finite element, 3D numerical simulation of terrestrial stress field of Block Xi-3 in Hailaler Basin is established based on reliable geological model, mechanical model and mathematical model that established on the basis of geological characteristics and actual data from Block Xi-3 in Hailaer Basin. The maximum main horizontal stress at the top of Member Nan-1 is 44 -51 MPa, the minimum main horizontal stress is 37 - 42 MPa. The lateral and vertical distribution of terrestrial stress in this block is derived, which provids the ground for well pattern deployment and fracturing processing design.