东海陆架盆地瓯江凹陷烃源岩评价及资源量预测  

Evaluation of Source Rock and Petroleum Resource Estimation in the Oujiang Sag,the East China Sea Shelf Basin

作　　者：郝乐伟[1] 王琪[1] 梁建设 唐俊[1,3,4] 田兵[1,3] 廖朋[1,3] 

机构地区：[1]中国科学院油气资源研究重点实验室,甘肃兰州730000 [2]中海石油研究总院,北京100027 [3]中国科学院研究生院,北京100049 [4]内蒙古科技大学数理与生物工程学院,内蒙古包头014010

出　　处：《天然气地球科学》2012年第6期1054-1059,共6页Natural Gas Geoscience

基　　金：国家科技重大专项海洋深水区油气勘探关键技术(编号:2008ZX05000-025);中国科学院"西部之光"联合学者计划项目联合资助

摘　　要：瓯江凹陷是东海盆地油气资源重要的分布区之一,其勘探程度仍较低,尚处在起步阶段,需要开展资源再评价,为进一步勘探开发提供参考。根据钻井资料、不同沉积相烃源岩展布特征,结合前人的地球化学分析资料,利用多图叠合法,对研究区有效烃源岩的平面分布进行预测,得出有效烃源岩的分布面积从月桂峰组、灵峰组到明月峰组呈逐渐减少的趋势。在分析烃源岩特征的基础上,结合研究区的地质实际设置参数,运用概率论的原理,采用蒙特卡罗法进行计算,得到研究区资源量的概率分布曲线。计算结果表明,研究区各层组中,灵峰组资源量最大,月桂峰组次之,明月峰组最小;研究区总的基准资源量为5.73×108t,总资源量为(5.17～6.38)×108t。通过对研究区资源量进行敏感性分析,确定了影响研究区资源量计算的主要参数为地层厚度和氯仿沥青"A",面积对其影响较小。Oujiang sag is an important oil and gas bearing area in the East China Sea shelf basin.Its exploration level is still low.It is required to re-evaluate the resources to provide a reference for further exploration and development.According to drilling data,source rock distribution in different facies as well as previous geochemical data,the plane distribution of effective source rocks in the study area is predicted by using the multi-map method.The areas of effective source rocks have a tendency of gradual decrease from Yueguifeng Formation,Lingfeng Formation to Mingyuefeng Formation.Based on probability theory,we use the Monte Carlo method to get the probability distribution curve of petroleum resource,in combination with the actual geological background of Oujiang sag.The results show that the Lingfeng Formation has the largest amount of resources,the Yueguifeng Formation is followed,and the Mingyuefeng one is relatively little.The total baseline resource in the study area is 5.73×108t and the total resource is from 5.17×108 to 6.38×108t.The main influence parameters which affect the calculation of the amount of resources in the study area are the formation thickness and chloroform bitumen ＂A＂ by analyzing the sensitivity of resources in the study area.The area has less affected to the calculation result.

关 键 词：烃源岩 蒙特卡罗法 资源量 瓯江凹陷 东海陆架盆地 

分 类 号：TE122.115[石油与天然气工程—油气勘探]