摘要
断层圈闭在油气勘探中是非常重要的构造 ,断层封闭机制业已成为近年来断层理论研究的新重点。在解释封闭层封闭原理的基础上 ,详述了国内应用较多的利用断面正应力评价断层封闭的分析方法 ,指出其在断层垂向方面的特定适用性 ,及在研究断层侧向封闭方面的研究中存在的不足之处。针对目前对断层封闭的研究大都限于断层垂向封闭机制的状况 ,阐明了断层泥、对置岩层毛细管压力差异、断层伴生变形构造及成岩愈合作用的断层侧向封闭机理 ,最后总结了容易形成油气运移封闭的断层特征。
Fault trap is an important structure in the exploration of oil and gas.Fault trap mechanism has become a new highlight in the recent years in the study of fault theory.On the basis of explaining the principle of fault sealing,the authors elaborated the analytical method of positive fault stress to evaluate fault sealing which was considerably used at home,pointed out the specific suitability on the vertical side of the fault and some deficeiency existed in the study of lateral sealing of the fault.In view of the present situation that the study of fault sealing is mostly concentrated on the vertical sealing mechanism of faults,the authors expounded and stated that the capillary pressure difference of fault gouge and opposite layers,the associated deformed structures and the fault lateral sealing mechanism of diagenetic cicatrization.The fault properties susceptible to form migrated sealing of oil and gas were summarized finally in the paper. [WT5HZ]
出处
《江苏地质》
2000年第2期95-100,共6页
Jiangsu Geology
