摘要
石油脉群发育在鄂尔多斯盆地中部靖安油田南二区三叠系延长统主力储层里 ,由大量密集、相对短小的规则或不规则脉体组成。脉体为张裂成因 ,具有与近水平的层理大致平行的趋势 ,反映出群脉应该在高的异常超压 (即流体压力不小于静岩压力 )下形成。这种超压与油气运移密切相关 。
Oil vein swarm is found in the Triassic Yangchang Formation, central Ordos basin. It consists of numerous veins in a variety of shapes, comparatively short and filled with bitumen. The veins tend to have a horizontal dip that is parallel to bedding. Their occurrence suggests that abnormal overpressure should be required in the formation of the veins. The author herein considers the overpressure as an indicator of rapid migration of oil in low permeability reservoirs.
出处
《大地构造与成矿学》
EI
CAS
CSCD
2000年第4期329-332,共4页
Geotectonica et Metallogenia
基金
山东省自然科学基金!(Y98E0 80 78)
