【摘要】 目前由于油气勘探技术的提高,国内物性较好的沉积岩储层油气资源逐步被发现和开发,而火成岩和基岩变质岩中裂缝储层在华北、辽河油田、大庆等油田相继发现巨大的油气资源,也使裂缝储层成为油气勘探的新领域。以海拉尔盆地乌东地区为例,基于三维地震资料,在建立层序格架和精细断层解释基础上,进行构造应力场模拟,通过构造曲率、最大主应变、最大主应力等参数对构造裂缝分布进行预测,结果表明构造应力场分布与构造断裂体系之间具有较好的相关关系,裂缝发育带分布在不同方向的两组断层相交部位、正断层或逆断层的上盘附近。裂缝预测的影响因素主要是断层的位置和方向的精度,地层横向厚度和密度变化较大也对预测精度产生影响。更多还原

【Abstract】 At present,oil and gas resources of sedimentary rock reservoir of better physical performance were gradually discovered and developed in China,owing to the technical improvement in oil and gas exploration.Huge oil and gas resources of fractured reservoir of igneous rock and basement metamorphic rock were successively discovered in Huabei,Liaohe,and Daqing Oilfields,etc.,so fractured reservoir became new domains of exploration for oil and gas.Taking Wudong Area of Hailaer Basin as an example,and on the basis of 3D seismic data,stress stimulation was conducted,based on the establishment of sequence stratigraphic framework and detailed interpretation of faults.Distribution of structural fractures was predicted with such parameters as structural curvature,major principal strain,and major principal stress,etc.Results showed that there was better correlation between structural stress distribution and structural faults,and fractures developed at the intersection of two groups of faults of different direction,and near the upper side of normal fault and thrust.Factors affecting fracture prediction mainly included the accuracy of fault’s position and direction.Greater change of horizontal thickness and density of strata also exerted influence on the accuracy of prediction.更多还原