河北宽城蓟县系铁岭组岩石特征及沉积环境分析  

Analysis on Petrological Characteristics and Sedimentary Environment of Tieling Formation of Jixian System in Kuangcheng Area of Hebei Province

作　　者：罗顺社[1] 李任远[1] 汪凯明[1] 陈晓油 王丽云 余凤波 

机构地区：[1]气资源与勘探技术教育部重点实验室(长江大学)长江大学地球科学学院,湖北荆州434023 [2]中国石油东方地球物理公司研究院乌鲁木齐分院,新疆乌鲁木齐830016 [3]中国石油东方地球物理公司辽河物探分公司,辽宁盘锦124010

出　　处：《石油天然气学报》2010年第3期1-6,共6页Journal of Oil and Gas Technology

基　　金：国家自然科学基金项目(40772078);中国石油化工股份有限公司海相油气勘探前瞻性项目(YPH08025)

摘　　要：河北宽城蓟县系铁岭组主要为一套滨海潮坪相碳酸盐岩沉积,剖面实测厚度211.11m,可划分为两段。该套地层岩石类型主要为碳酸盐岩,其次为泥页岩和硅质岩。碳酸盐岩可进一步划分为砾(砂)屑灰(白云)岩、瘤状灰岩、叠层石灰岩、泥(粉)晶灰(白云)岩和泥质灰(白云)岩。根据岩石学特征及沉积构造等相标志,划分为潮上带、潮间带(上、下)和潮下带(上、下)3种沉积环境。地化特征表明,铁岭组一段沉积期气候干燥炎热、海水古盐度较高;铁岭组二段沉积期则气候温暖潮湿、古盐度较低、陆源物质供应较多的环境。石油地质条件初步分析表明,铁岭组灰岩储层具备油气成藏的烃源岩条件、储集条件和盖层条件,该组合找到原生油藏的可能性较大,具有良好的勘探潜力。The Tieling Formation of Jixian System in Kuangcheng Area of Hebei Province was a set of carbonate deposition of coastal tidal-flat facies with measured profile thickness of 211.1m and from the bottom to top it could be divided into two sections.The rock types of this set of strata were mainly carbonate rocks,the next were mud shale and silicalite.Carbonate rocks could be further divided into calcarenite(dolomite),knollenkalk,stromatolitic limestone(dolomite),micrite(dolomite),and argillaceous limestone(dolomite).According to the petrological characteristics as well as sedimentary structures and other facies' signs,the sedimentary environment could be supratidal zone,intertidal zone and subtidal zone.The geochemical characteristics indicates that the first section of Tieling Formation was formed in a hot,dry climate with higher palaeosalinity,and the second section was formed in a warm,humid climate with lower palaeosalinity and greater supply of terrigenous materials.The preliminary analysis indicates that because of its hydrocarbon source rock conditions,reservoir conditions and caprock conditions,the Tieling limestone reservoir possesses good exploration potential and it is probable to find original petroleum reservoir here,it has a good potential of oil exploration.

关 键 词：铁岭组 蓟县系 岩石特征 沉积环境 河北宽城 

分 类 号：P618.13[天文地球—矿床学]