摘要
古构造恢复是探索多旋回盆地油气藏改造、重组的有效手段之一。古构造恢复的基本原理是"回剥",即通过"退变形"而获得不同地质演化阶段某构造层的埋藏起伏变化。回剥可以视为剔除上覆地层,并将不同时期古水准面恢复到原位的过程。利用层序充填特点和古水平面重塑研究古构造的新方法。在三维地震覆盖区,标示古水平面的层序特点在较高精度成像的地震数据体中是可以识别的,利用三维地震解释技术,可以精确恢复针对圈闭或局部构造单元的变形史和变形基础。在黄骅坳陷乌马营地区进行了实例应用研究,研究表明:利用该方法可精确恢复三维空间内、不同时期潜山高点迁移的变化规律;古构造恢复的结论与WS1井气藏特点的吻合,为潜山天然气藏的评价和目标勘探提供了决定性依据。
Paleostructure restoration can be treated as one of the practical ways for understanding manners of hydrocarbon reservoir reformation and rearrangement in multi-cycle evolved basins.The recharge,remigration and rearrangement history of hydrocarbon can be traced by analyzing the fluctuations of paleostructure highs in different geological periods.Paleostructure restoration is based on ″back-stripping″ technique,which can reconstruct the contours of one geologic horizon in different deformation stages through ″un-deformation″ procedure.And the process of paleostructure traps relocation can be investigated by exploring the changes of structure highs.Some basic principles for paleostructure restoration are discussed in this paper,and a new method by using reestablishing paleo-horizontal detected from information of sequence infillings as remark of buried paleostructure was proposed.
出处
《矿物岩石》
CAS
CSCD
北大核心
2005年第2期93-98,共6页
Mineralogy and Petrology
关键词
多旋回盆地
古构造恢复
层序结构
multi-cycle evolved basins
paleostructure restoration
sequence infillings
