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梁家楼油田纯 41断块位于东营凹陷的西南部 ,主要油气产层是沙四段。现今地应力对油田开发有重要影响。用岩心声速法和井斜统计法确定关键井的水平主应力方向 ,用声发射法测量关键井的水平最大主应力 ,用水力压裂法计算关键井的水平最小主应力。以关键井的地应力测量、计算结果为约束条件 ,采用弹性平面有限元法模拟该断块沙四段现今地应力场 ,结果是 :水平最大主应力值为 5 2～ 74MPa ,断块内部为近东西向 ,断层带主要为北西向 ;水平最小主应力值为 41～ 5 2MPa ,断块内部为近南北向 ,断层带主要为北东向。图 5表 3参 10
The pure block 41 of Liangjialou Oilfield is located in the southwestern part of Dongying Sag. The main oil and gas formation is Shasi Section. Nowadays, stress has an important influence on oilfield development. The horizontal principal stress direction of the key well is determined by the rock sound velocity method and the slope inclination statistics method. The horizontal principal stress of the key well is measured by the acoustic emission method. The horizontal minimum principal stress of the key well is calculated by the hydraulic fracturing method. Taking the stress measurement and calculation results of the key wells as the constraint conditions, the present geostress field of the fourth member of Shahejie Formation is simulated by elastic plane finite element method. The results show that the maximum principal stress value is 52 ~ 74MPa, In the east-west direction, the fault zone is mainly northwest direction; the minimum horizontal principal stress value is 41-52MPa; the fault is nearly north-south direction within the fault block and the fault zone is mainly north-east direction. Figure 5 Table 3 Reference 10