论文部分内容阅读
四川的油气勘探开发已经有相当长的历史,在四川盆地的不同构造、不同层位找到了许多油气田。目前正面临着这样一个问题:当以构造为对象的勘探工作快要接近尾声的时候,下一步工作应当怎么办?构造只占整个四川盆地很小的比例,在构造之外的广阔地区,是不是就没有获得工业油气的希望?针对四川碳酸盐岩油气勘探的现状,本文着重指出,除了要用传统的概念(构造勘探)继续扩大油气资源外同时还应该用新概念在老油气区寻找新的油气田,即把视线扩大到构造圈闭之外的广阔地区。本文认为七十年代末期提出的成岩圈闭的理论是解决这个问题的途径之一。 本文回顾了“成岩圈闭”研究的现状,讨论了成岩圈闭形成的机理、成岩圈闭的分类、以及各类成岩圈闭的特征。在分析四川石油勘探部分资料的基础土,探讨了四川盆地碳酸盐岩储层形成成岩圈闭的有利条件和寻找这种圈闭的方法。
There have been quite a long history of oil and gas exploration and development in Sichuan, and many oil and gas fields have been found in different structures and layers in the Sichuan Basin. Currently, we are faced with the problem of what to do next work when exploration-for-structure exploration is drawing to a close. Construction is only a small proportion of the entire Sichuan Basin, and is it in a vast area outside the structure? There is no hope of obtaining industrial oil and gas. In view of the present situation of hydrocarbon exploration in carbonate rocks in Sichuan, this paper emphasizes that in addition to continuing to expand oil and gas resources by using traditional concepts (structural exploration), new concepts should also be found in old oil and gas areas Oil and gas fields, that is, to extend their attention beyond the structural traps outside the vast area. This paper argues that the theory of diagenetic traps proposed in the late seventies is one of the ways to solve this problem. This paper reviews the current status of “diagenetic traps”, discusses the mechanism of diagenetic traps, the classification of diagenetic traps, and the characteristics of various diagenetic traps. Based on the analysis of the base soil of some petroleum exploration data in Sichuan, the favorable conditions for the formation of diagenetic traps in carbonate reservoirs in Sichuan Basin and the methods of searching for such traps are explored.