中上扬子盆地叠加、改造类型及油气勘探前景  

Superimposing and Rebuilding of the Middle-Upper Yangtze Basins and Its Prospects of Oil and Gas in Marine Strata

作　　者：倪新锋[1,2,3] 陈洪德[4] 韦东晓 刘文均[4] 

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]中国石油塔里木油田分公司博士后工作站,新疆库尔勒841000 [3]中国石油杭州地质研究院,杭州310023 [4]成都理工大学沉积地质研究院,成都610059

出　　处：《地质学报》2009年第4期468-477,共10页Acta Geologica Sinica

基　　金：国家"十五"重大科技攻关项目(编号2004BA616A-06-02);中石化"十五"重大科技项目(编号P03044)资助的成果

摘　　要：盆地的叠加、改造作用建设性或破坏性地影响了中上扬子叠合盆地不同构造阶段油气资源的形成、运移和成藏过程。从盆地演化及生储盖组合的角度将盆地叠合关系分为覆盖型(连续覆盖型、间断覆盖型)以及非覆盖型(下组合保持型、上组合保持型)。不同的覆盖关系对烃类的生成、演化、运移、保存或破坏,产生不同程度的影响。盆地演化过程中多旋回构造运动所产生的隆起、坳陷、冲断、褶皱、块断、隆升以及热动力作用等多种方式导致的改造,均对古生代海相盆地油气成藏产生程度不同、利弊不一的影响。最后指出不同覆盖类型的盆地中,以连续覆盖型盆地的前景最为优越;具有间断覆盖特点的江汉南部的沉湖-土地堂复向斜,地质条件相对较为有利;下组合保持型地区也具有良好的油气勘探远景;上组合保持型覆盖地区,其油气前景很值得认真研究和探索;对于那些由于大型推覆构造所形成的特殊覆盖关系中,下盘海相地层中的油气成藏和勘探值得重视。The superimposing and rebuilding of basins effectively or destructively controls the formation and migration of resources, and accumulation over different tectonic stage in middle-upper Superimposed Yangtze Basin. Based on the basin evolution and source-reservoir-cap combination, overlay relationship of basins is divided into two types, they are the covered type （continuous covered type, discontinuous covered type） and uncovered type （upper assemblage holding type, lower assemblage holding type）. The superimposed relationship between Mesozic and Caniozoic continental basin and pro-Mesozoic and Cenozoic marine basin affect the formation, evolution, migration, conservation and destruction of the hydrocarbon. The destruction which is build up by uplifts, depression, thrust, corrugation, block-faulting and thermo kinetic action during the basin evolution because of the polycyclic tectonic movements affect accumulation in different degree. Finally, it is suggested that the prospecting of continuous covered type is the most superiority. Chenhu-Tuditang double-synclines in southern Jianghan basin which is discontinuous covered types, has advantage geology conditions. The prospect of oil and gas in upper assemblage holding type areas is worth carefully studying and exploring, as far as the preservation conditions. The areas of lower assemblage holding type also have good prospect. For those special overlay relation of large nappe structure, formation of oil/gas reservoir and exploration should be highlighted in footwall marine bed.

关 键 词：盆地叠加类型 改造作用 成藏效应 油气勘探 中上扬子盆地 

分 类 号：P618.13[天文地球—矿床学] P618.130.2[天文地球—地质学]