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复杂逆断块储层油藏地质建模一直是最麻烦的建模工作之一,难题在于同一储层在一口直井中多次重复出现。按照常规的油藏地质建模方法,由于无法表征逆断块叠置部分重复出现的地层构造和储层物性特征,导致模型失真和储量损失,无法建成一个精确可靠的油藏地质模型;粗化后的预测模型也存在因地层缺失、储量变小而不能反映油藏的真实情况。为解决上述技术难题,研发了以“多边界技术”、“断层隔挡技术”以及“全覆盖油藏叠合面积的矩形形式角点网格系统”数值模拟网格粗化等技术为核心的技术系列,组合形成一种高效解决复杂逆断块建模中的构造建模和数值模拟网格粗化等难题的方案。这种解决方案利用地震构造解释成果、沉积相、地层对比、井资料等,为英东一号复杂逆断块油藏的开发方案建立了精确的油藏地质模型和用于油藏数值模拟的动态预测模型。通过方案实施追踪证实,开发方案预测的生产指标和两年来的实际生产情况的吻合率在95%以上。
Complex inversion block reservoir geological modeling has been one of the most troublesome modeling efforts, with the problem that the same reservoir appears repeatedly in a single vertical well. According to the conventional reservoir geological modeling method, an accurate and reliable reservoir geological model can not be built due to the inability to characterize the repeated formation and reservoir physical properties of the superimposed thrust faults, leading to model distortion and reserve loss. After the prediction model also exists due to lack of strata, reserves become smaller and can not reflect the true situation of the reservoir. In order to solve the above technical problems, a rectangular corner grid system with “multi-boundary technology”, “fault barrier technology” and “full coverage of reservoir overlap area” was developed. The numerical simulation grid Technology and other technologies as the core technology portfolio, a combination of form a solution to the complex inverse fault block modeling modeling and numerical simulation of the problem of grid coarsening program. This solution uses the seismic tectonic interpretation of results, sedimentary facies, stratigraphic contrast, and well data to establish an accurate reservoir geologic model and numerical reservoir simulation for the development of the Yingdong-1 complex thrust block reservoir Dynamic prediction model. The tracking of implementation of the program confirmed that the coincidence rate between the production target predicted by the development program and the actual production in the past two years was above 95%.