摘要
以探井泥岩压实曲线为基础，对陕甘宁盆地陕北斜坡延长组泥岩压实特征进行了综合研究．结果表明，研究区正常压实趋势明显且一致性较好．欠压实现象普遍发育于长４＋５及长６油层组，保持压实与排水平衡的最小声波时差为２２５μｓ／ｍ．上覆地层遭受的剥蚀量达１８００～２５００ｍ，泥岩的欠压实成为本区油气运移的主要动力之一．
Based on the mudstone compaction curves of exploratory wells,a comprehensive study was made on the features of mudstone compaction in Yanchang FM of North Shaanxi slope of Shaaxxi-Gansu-Ningxia Basin.The results show that the normal compacion trend is clear and consistant and the under-compaction generally developed in the Yc4+5 Oil-bearing und YC6 oil bearing FM.the minmum sonic value which keeps equilibrium between the compaction and water drainage is 225 μm/s and the denudation of the overburden amoumts to 1800-2500m.The under-compacion of the mudstone is one of the main motive power of oil and gas migration in this region.
出处
《西安石油学院学报》
1996年第2期42-45,共4页
Journal of Xi'an Petroleum Institute
关键词
延长组
泥岩
压实作用
侵蚀作用
油气运移
Yanchang FM,mudstone,compaction,erosion,oil and gas migration
