珠江口盆地东部油气聚集系数求取  

The calculation of the petroleum accumulation coefficient in eastern Pearl River Mouth Basin

作　　者：朱俊章 朱明 石创 黄玉平 杨娇 魏启任 ZHU Junzhang;ZHU Ming;SHI Chuang;HUANG Yuping;YANG Jiao;WEI Qiren(Shenzhen Branch,CNOOC,Shenzhen 518054,Guangdong)

机构地区：[1]中海石油(中国)有限公司深圳分公司,广东深圳518054

出　　处：《长江大学学报（自然科学版）》2022年第2期12-22,共11页Journal of Yangtze University(Natural Science Edition)

基　　金：国家科技重大专项“南海东部海域勘探新领域及关键技术”(2016ZX05024-004);中海石油(中国)有限公司科技项目“中海油“十三五”油气资源评价(YXKY-2018-KT-01)”。

摘　　要：油气运聚系数是盆地模拟成因法油气资源评价的一个关键参数,直接影响资源量计算结果,而油气聚集系数法在算法上更合理。油气聚集系数是油气资源评价中最为关键的一个参数,科学地求取油气聚集系数,可以使油气资源评价结果更加客观。采用一种新的方法求取珠江口盆地东部油气聚集系数和石油地质资源量及其概率分布,采用盆地模拟成因法计算了5个成熟油区烃源岩的排油量及其概率分布,创新采用油藏规模序列法计算了珠江口盆地东部5个成熟油区的石油地质资源量及其概率分布,采用Oracle抽样模拟风险分析软件计算了5个成熟油区不同概率分布下的油气聚集系数,其概率均值下的油气聚集系数介于8.36%~11.59%之间。综合考虑珠江口盆地东部石油成藏的地质条件,可将成熟油区的油气聚集系数应用于邻区低成熟区或未勘探区,可以减少资源量计算过程中的人为因素,使珠江口盆地东部石油资源评价的结果更加客观,贴近实际地质和目前勘探开发情况。Hydrocarbon migration and accumulation coefficient is a key parameter of hydrocarbon resource evaluation by basin modeling genetic method,which directly affects the calculation result of resource amount,and the hydrocarbon accumulation coefficient method is more reasonable in algorithm.Hydrocarbon accumulation coefficient is the mostcritical parameter in the evaluation of oil and gas resources.Scientific calculation of hydrocarbon accumulation coefficient can make the evaluation results of oil and gas resources more objective.In this paper,a new method was used to calculate the hydrocarbon accumulation coefficient and petroleum geological resources and their probability distribution in the eastern Pearl River Mouth basin.The oil expulsion and its probability distribution of source rocks in five mature oil areas were calculated by using the basin modeling genetic method,and the pool size sequence method was innovatively used to calculate the petroleum geological resources and their probability distribution in five mature oil regions in the eastern Pearl River Mouth Basin..The hydrocarbon accumulation coefficients under different probability distributions in these oil areas were calculated by Oracle sampling simulation risk analysis software,and the hydrocarbon accumulationcoefficients under probability mean Pmean ranged from 8.36%to 11.59%.Comprehensively considering the geological conditions of oil accumulation in eastern Pearl River Mouth Basin,the oil accumulation coefficient of mature oil areas can be applied to the adjacent low mature areas or unexplored areas,which can reduce the human factors in the process of resource calculation,and make the evaluation results of oil and gas resources in eastern Pearl River Mouth Basin more objective and closer to the actual geology and current exploration and development situation.

关 键 词：资源评价 油气聚集系数 油藏规模序列法 盆地模拟成因法 石油地质资源量 排油量 珠江口盆地 

分 类 号：P618.13[天文地球—矿床学]