摘要
国内外深部优质储层的不断发现大大拓宽了油气勘探的新领域，但孔隙流体自然排放的压实理论和有机无机反应的次生孔隙窗机理对深部高孔渗储层并不能作出圆满解释。深部储层孔隙保存状况除与储层物质组成及其内部结构有关外，与各成岩动力学过程间的耦合关系更为密切。压实作用、胶结作用、粘土矿物转化、有机质热演化、溶蚀作用、异常流体压力的积累与释放等动力学过程在时间和空间上的不同组合决定了深部储层孔隙的发育程度及其保存状况。
The documentation of high quality reservoirs in great depths has remarkably opened up the study of sandstone diagenesis. The current compaction theory and organic inorganic reactions can not completely explain anomalous high porosity in deep buried reservoirs. The preserved porosity in deep buried reservoirs is depended on mineral composition and texture of the reservoirs besides, more on coupling relationship between different diagenetic dynamic processes such as compaction, diagenetic transformation of clay minerals, organic thermal evolution, cementation, solution of unsteady minerals, and abnormal fluid pressure accumulation and release. The definite space time assemblage of the processes above mentioned corresponds to ascertainable diagenesis porosity evolution model. According to the porosity development characteristics of Shahejie Formation in Qinan fault steped zone in Qikou depression, porosity preservation mechanism of deep buried sandstone is discussed further.
出处
《现代地质》
CAS
CSCD
北大核心
1998年第1期108-114,共7页
Geoscience
关键词
成岩动力学
深部储层
孔隙预测
油气勘探
diagenetic dynamics, deep buried reservoir, coupling relationship, diagenesis porosity evolution, porosity prediction
