【摘要】 利用有限元数值模拟技术对油气田深部储层构造裂缝进行仿真和预测分析是一种非常有效的办法。传统的仿真方法中,由于控制条件多来源于实验室实测结果,虽然结果较为准确,但是存在以点代面、成本过高等缺陷。选择大庆油田一个深部油气层作为研究目标,探索在地质构造裂缝的仿真预测中边界控制条件的选择问题。首先利用实验室实测力学参数建立初始模型,然后通过反演18条地震剖面的伸展情况获得该地层变形情况,并将反演结果作为仿真构造应力场的边界控制条件,进而在开源的有限元软件FEPG上进行仿真,从而避免了传统方法中因单纯以岩石实验结果作为控制条件而导致的以点代面和成本过高等不利因素,仿真结果与钻井数据统计结果基本一致。仿真结果表明,预测的构造裂缝发育主要集中在构造高位置以及断层附近,裂缝方向有较明显的规律性,优势方向与本区断层带走向基本一致,在相邻的断层之间,裂缝发育方向变化较大。仿真也为明确裂缝分布规律及油气勘探提供了理论指导和技术支持。更多还原

【Abstract】 Numerical simulation technique is a valid way to quantitatively predict parameters of structural fractures in a reservoir.In traditional simulation methods,as controlling conditions from experimental results,the simulation precision is very high but with some defects,such as high cost,point replacing surface,and so on.This paper targets at one deep oil formation of Daqing oil field to explore how to use controlling conditions in the simulation and analysis of geology structural fractures.Firstly,the initial model is built using mechanics parameters got in lab.Secondly,the formation deformation is obtained by the retrieval extension of 18 seismic sections,and then selects the result of faults inversion as controlling conditions.Finally,simulate it on the open finite element analysis software,FEPG.Thus,the unfavorable factors,high cost and point replacing surface in traditional simulation methods is avoided.The simulation results have shown satisfaction with statistical results of drilling data.The results show that structural fractures developed area are centralized at the range in structural high and near fault,significant regularity can be found for the fracture direction,and the superior direction of fractures is near NS direction which is coincided with the direction of fault zone in Anda area,while great variation changed of the fracture development orientation in the area of two faults.更多还原