DISCUSSION ON THE STRESS TRAPS OF OIL/GAS
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摘要: 笔者根据四川区内若干三叠系油气藏赋存地质特征,提出控制油气藏的因素,不仅是"重力分异"、 "水动力驱动"等,地应力控制圈闭,应该是主要的因素。笔者应用固体力学理论,把含油气藏的背向斜构造,看作是各向同性,均匀连续的弹塑体受力失稳产生的挠曲,分析其应力分布状况,结合实例,建立地应力圈闭的简单成藏模式,得出油气运移、聚集、形成油气藏都受地应力场的控制,或与受地应力控制的构造形变过程同时进行及完成的。Abstract: The main factors of crust deformation are of the changes of stress fields and the geological stress itself.Therefore,the movements of all materials which include oil,gas and water in petroliferous formations and basins are controlled and driven by geological stresses.As the petroliferous formation are considered as elastic-plastic bodies with isotropic,homogeneous and continuous characters,a series of anti-clines and synclines would be analogous to deflection of solid materials which is due to unstable by force.Based on the relationship amound the isopleth distribution of tri-dimensional principal strsses,known oil/gas migration directions and the location of oil/gas accumulation,it is suggested that oil/gas migration direction is perpendicular to the trace of main pres-sure stresses(σ3),and parallel to the trace of main tensile stresses(α1).The oil/gas accumulation is located at low pressure zone in a closed tri-dimensional stress-gradient space composed by the traces of the main tensile stress(σ1)and the central main stress(σ2).
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[1] 王仁、丁中一、殷有泉,1979,固体力学基础,地质出版社. [2] 王尚文,1983,中国石油地质学,石油工业出版社. [3] 中国科学院兰州地质研究所译,1979,大油田地质学,甘肃人民出版社. [4] 司徒愈旺,1981,试论我国油气藏的圈闭类型及分布特点,天然气工业,第3期. [5] 刘淑茸、徐树宝译,1986,非背斜圈闭油气藏,石油工业出版社. [6] 李四光,1973,地质力学概论,科学出版社. [7] 张万选,1981,论油气藏分类及中国油气藏的主要类型,石油学报,2卷3期. [8] 赵从俊、欧振洲,1981,四川盆地三叠系储集层构造中性面与油气富集的关系,天然气工业,第2期. [9] B.E.Hobbs. W.D.Means.P.F.Williaas,An Outline of Structural Geology,Copyright 01978.by John Wiley&Soas,inc.Printed is the Uaited States of America.
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