苏北盆地溱潼凹陷浅变质带特征及其储集条件分析  

Characteristics of the Shallow Metamorphic Belt and its Reservoir Conditions in the Qintong Depression of Subei Basin,China

作　　者：刘金帅[1] 杨飞[1] 陈孔全 沈均均 周舟[1] 吴峻 张锋[3] LIU Jin-shuai;YANG Fei;CHEN Kong-quan;SHEN Jun-jun;ZHOU Zhou;WU Jun;ZHANG Feng(School of Geophysics and Petroleum Resources,Yangtze University,Wuhan,Hubei 430100;Hubei Cooperative Innovation Center of Unconventional Oil and Gas,Wuhan,Hubei 430100;Sinopec East China Company,Nanjing,Jiangsu 210011)

机构地区：[1]长江大学地球物理与石油资源学院,湖北武汉430100 [2]非常规油气湖北省协同创新中心,湖北武汉430100 [3]中国石化华东油气分公司,江苏南京210011

出　　处：《地质与勘探》2018年第4期846-855,共10页Geology and Exploration

基　　金：中国石油化工股份有限公司华东油气分公司项目(34600000-16-ZC0607-0004)资助

摘　　要：苏北盆地溱潼凹陷发育大量的浅层侵入岩,其侵入岩主要为辉绿岩,在辉绿岩邻近的泥岩易受到温度的影响发生变质作用,形成泥岩变质带。根据资料显示,泥岩变质带较常见的岩石主要有两种类型:板岩、角岩,两种岩石的孔隙和裂缝较发育,其中角岩物性相对较好。变质带的变质程度与其距辉绿岩的远近有关,距辉绿岩越近,变质带变质的程度越深,其储集条件就越好,反之相反。变质带的孔隙类型主要有溶蚀孔、晶间孔、微裂缝、收缩缝和溶蚀缝等,其中裂缝作为变质带的主要储集空间。辉绿岩变质带可作为油气聚集的有利场所,勘探远景广阔,重视对这类新型油气藏的研究探索能为火山岩相关油气藏新增亮点。There are a large number of shallow intrusive rocks in the Qintong depression of the Subei Basin,which are dominated by diabase.The mudstone adjacent to this diabase is susceptible to the metamorphism of temperature,forming a mudstone metamorphic belt.According to the data,there are two types of rocks that are common in this mudstone metamorphic belt：slate and hornstone,and the pores and fractures of the two rocks developed well,of which the petrophysical properties of hornstone are relatively good.The development degree of the metamorphic belt is related to its distance from diabase,and the closer it is to the diabase,the deeper the metamorphic belt is metamorphosed,and the better its reservoir condition is,and vice versa.The types of pores in metamorphic zones are mainly dissolution pores,intercrystal pores,microcracks,contraction cracks and dissolution cracks,among which cracks are the primary reservoir space in the metamorphic belt.The diabase metamorphic zone can be used as a favorable place for oil and gas accumulation,and has a broad exploration prospect.The exploration and research on these new reservoirs will add new bright spots to volcanic-related reservoirs.

关 键 词：溱潼凹陷 辉绿岩 泥岩变质带 岩石类型 储集条件 苏北盆地 

分 类 号：TE132[石油与天然气工程—油气勘探]