摘要
长岭断陷经历侏罗纪火石岭组—白垩纪营城组沉积时的断陷期、白垩纪登娄库组—白垩纪末期的拗陷期、第三纪至今的反转期三大演化阶段,发育6个次凹、13个二级构造带,构造带走向多为NE向或近SN向,构造带的形成及演化具有相似性,均为营城组末期形成,后期经历三次张扭改造,但张扭改造程度有强有弱。本文通过研究长岭断陷地质结构、构造特征、火山岩特征及分布,认为长岭断陷规模大、天然气资源丰富,总体上处于天然气初期勘探阶段。火山岩体发育,储层物性较好,具有良好的保存条件,长岭断陷深层具有良好的天然气勘探前景。
Six secondary sags and 13 secondary structural belts have been developed in Changling depression after 3 evolutionary stages: fault depression of Jurassic Huoshiling Group-Cretaceous Yingcheng Group deposition,Cretaceous Denglouku Group-late Cretaceous depression!and Tertiary-today' reversion.The run of structural belts is mostly NE or near!NE direction and their formation and evolution have similarity: formed in the late Yingcheng Group and were reformed after three extensional and twisting actions,but the levels of deformation by extensional and twisting actions are mixed.After study of geological structure,structural feature,and property and distribution of vulcanite,the paper considered that Chanling fault depression is characteristics of large scale,rich in natural gas resource and generally in preliminary stage of natural gas exploration,which made the deep of Changling fault depression have good natural gas exploration prospects because of developed vulcanite,good physical property of reservoir that have good preserve condition.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2006年第B09期33-36,共4页
Oil Geophysical Prospecting
