关键层面古地貌演化剖面的建立及地质意义  

Establishment of paleo-topography evolutionary section of key strata boundary and its geological implications

作　　者：张辉[1,2] 胡望水[1,2] 李伟[3] 陈竹新[3] 郝猛[1,2] 郭先涛 樊仲 GORDON Benkane 陈章文 ZHANG Hui;HU Wangshui;LI Wei;CHEN Zhuxin;HAO Meng;GUO Xiantao;FAN Zhong;GORDON Benkane;CHEN Zhangwen(College of Geoscience,Yangtze University,Wuhan City,Hubei Province,430100,,China;Key Laboratory of Oil&Gas Resources and Exploration Technologies,Ministry of Education,Yangtze University,Wuhan City,Hubei Province,430100,China;PetroChina Research Institute of Petroleum Exploration&Development,Beijing City,100083,China)

机构地区：[1]长江大学地球科学学院,湖北武汉430100 [2]长江大学油气资源与勘探技术教育部重点实验室,湖北武汉430100 [3]中国石油勘探开发研究院,北京100083

出　　处：《油气地质与采收率》2018年第2期8-14,共7页Petroleum Geology and Recovery Efficiency

基　　金：基金项目:国家科技重大专项“前陆冲断带及复杂构造区地质演化过程、深层结构与储集层特征”(2016ZX05003-001)。

摘　　要：针对关键层面不同地质历史时期古地貌平面难以横、纵向灵活、精细对比的实际问题,首次提出基于关键层面古地貌三维模型的图切剖面法和基于正、反演方式的平衡剖面法的2类3型关键层面古地貌演化剖面构建方法,进而分析证实古地貌演化过程中古地貌继承、间断、变换(正变换和负变换)行为的存在,并探讨其识别标志,总结关键层面古地貌演化剖面在古地貌演化行为分析、不同构造体系下构造-沉积耦合作用剖析、递进构造变形、圈闭演化及油气成藏演化等方面的地质应用价值及意义。选取川西北震旦系顶面进行关键层面古地貌演化剖面进行实例分析,证实古地貌演化剖面的应用价值,为古地貌演化分析提供了新的思路,为局部古地貌演化精细对比提供了有效的途径,也提高了古地貌演化分析的准确性、灵活性和时空分辨率。The paleo-topography maps of different geologic evolutionary stages are hard to be correlated with each other in horizontal and vertical with flexibly and high resolution.To solve this problem,a method for paleo-topography evolution es-tablishment was first proposed,comprising of two types of methods and three models which included a cut-out section meth-od based on a 3D model of key strata boundary and a balanced cross section method comprising of the same key strata boundary during different evolutionary stages based on forward and inverse modeling.Furthermore,the existence of paleotopography evolutionary behaviors such as inheritance,hiatus and transformation(positive topography transformation or neg-ative topography transformation)was analyzed and certified and the identification signatures during paleo-topography evo-lution were further discussed.The geological applications and implications of key strata paleo-topography evolution were summarized,including the analysis of paleo-topography evolutionary behaviors,tectonic-sedimentary coupling relation-ships under different tectonic mechanisms,progressive tectonic deformation and trap and hydrocarbon accumulation evolu-tion.A paleo-topography evolutionary section of the Sinian top in the northwest of Sichuan Province was selected as an ex-ample to verify the geological applications and implications of paleo-topography evolution,which offered a new approach for the paleo-topography evolution analysis and provided an effective way to realize fine correlation of local paleo-topogra-phy evolution,and it was also applied to improve space-time resolution,flexibility and accuracy of paleo-topography evolu-tion studies.

关 键 词：关键层面 古地貌演化剖面 平衡剖面 图切剖面 古地貌演化行为 地质意义 

分 类 号：TE111.3[石油与天然气工程—油气勘探]