东营凹陷中央隆起带沙河街组储层成岩产物对烃类流体的指示意义  

Diagenetic products of Shahejie Formation in central uplift belt of Dongying depression and their significance to hydrocarbon fluids

作　　者：柳晓光 孔嘉旭 孙彬 LIU Xiaoguang;KONG Jiaxu;SUN Bin(China Communications Tianhang Southern Transportation Construction Co.,Ltd.,Shenzhen 518102,Guangdong,China;Research Institute of Coal Geophysical Exploration of China National Administration of Coal.Geology,Baoding 072750,Hebei,China;School of Geological Engineering and Geomatics,Chang’an University,Xi’an 710054,Shaanxi,China)

机构地区：[1]中交天航南方交通建设有限公司,广东深圳518102. [2]中国煤炭地质总局地球物理勘探研究院,河北保定072750 [3]长安大学地质工程与测绘学院,陕西西安710054

出　　处：《矿产勘查》2024年第S01期320-329,共10页Mineral Exploration

基　　金：内蒙古自治区地质勘查基金“内蒙古自治区乌兰察布市苏吉营盘等四幅1∶5万区域矿产地质调查”(NMKD 2010-3-4);中央高校基本科研业务费专项资金-长安大学优秀博士学位论文培育资助项目(300102262713);国家自然科学基金青年基金项目(42207197)联合资助

摘　　要：为确定东营凹陷中央隆起带各类成岩现象的期次特征、序次以及油气充注特征,本文通过分析不同期次成岩产物的荧光特征、与沥青质接触关系、包裹体特征、碳氧同位素特征、常微量元素特征等信息,识别对于含烃流体具有指示关系的成岩产物。研究结果表明:通过成岩矿物与沥青质接触交代关系可以识别出三期油气充注,接触交代关系分别为沉积接触、断层接触、侵入接触。东营凹陷中央隆起带三期油气充注按次序分别对应的指示成岩产物为棕黄色自生高岭石及长石溶蚀与高岭石不发育的成岩组合、呈链珠状分布的黄铁矿、晚期铁白云石胶结物。东营凹陷中央隆起带发育的成岩产物具有种类多、多期次特征,对于恢复盆地内油气成藏过程具有重要意义。This study aims to determine the stage characteristics,sequence,and oil and gas filling characteristics of various diagenetic phenomena in the central.uplift zone of Dongying Depression.By anal.yzing the fluorescence characteristics,contact relationship with asphal.tene,inclusion characteristics,carbon and oxygen isotope characteristics,and characteristics of trace elements of diagenetic products from different stages,we identify diagenetic products that have indicative relationships with hydrocarbon containing fluids.The research results indicate that three stages of oil and gas filling can be identified through the contact and metasomatic relation-ship between diagenetic mineral.s and asphal.tene.The contact and metasomatic relationships are sedimentary contact,fault contact,and intrusive contact,respectively.The diagenetic products corresponding to the three stages of oil and gas filling in the central.uplift zone of Dongying Depression in sequence are brown yellow authigenic kaolinite and the diagenetic combination of feldspar dissolution and undeveloped kaolinite,pyrite distributed in a chain bead shape,and late iron dolomite cement.The diagenetic products developed in the central.uplift zone of Dongying Depression have multiple types and stages,which is of great significance for restoring the process of oil and gas accumulation in the basin.

关 键 词：水岩反应 成岩序次 含烃流体 示烃矿物 

分 类 号：P618.13[天文地球—矿床学]