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.
Abstract
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 restor-ing the process of oil and gas accumulation in the basin.
基金项目
内蒙古自治区地质勘查基金(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)
NETL
NSTL
万方数据