摘要
本文介绍了国内外含油气盆地断层封闭研究进展.1.“Allan”断面图是表示断层两侧岩性对接关系沿垂向和走向变化情况的图件,用于分析断层横向封闭性.2.断层活动方式不同,其封闭性也很不相同,从扭断层向道断层、正断层封闭性渐差.在现代构造应力场作用下,与最大水平主压应力(σ1)近垂直的断层封闭性最好,与σ1近平行时最差.3.(区域盖层沉积后和排烃期后以及近代的)断层活动强度越大,封闭性越差.
This paper introduces the development of research on sealing of faults, especially the 'Allan' fault-plane map and the relationships of the sealing of faults with the modes of fault activity. neotectonic stress field and the intensity of fault activity. Conclusions are as follows. ( 1 ) An 'Allan' fault-plane map can show most directly the juxtaposed lithology and stratigraphic geometry across the fault. (2) Sealing increases from normal to reverse faults.and then to wrench faults. (3) Sealing is best when the strike of a fault is nearly perpendicular to the maximum horizontal neotectonic stress (SH).and worst when parallel to SH. (1) The greater the intensity of fault activity (especially after deposition of the regional seals or the main expulsion of hydrocarbon. and during the neotectonic stage ) .the less effective the sealina of faults.
出处
《地质科技情报》
CAS
CSCD
北大核心
1991年第2期51-55,共5页
Geological Science and Technology Information
