华北北部中、上元古界生烃潜力与勘探前景分析  

SOURCE POTENTIAL FOR GENERATING HYDROCARBON AND EXPLORATION PROSPECTS OF MIDDLE-UPPER PROTEROZOIC IN THE NORTHERN CHINA

作　　者：方杰[1,2] 刘宝泉[2] 金凤鸣[2] 刘敬强[2] 鱼占文[2] 

机构地区：[1]南京大学成矿作用国家重点实验室,江苏 南京 210093 [2]华北油田勘探开发研究院,河北 任丘 062552

出　　处：《石油学报》2002年第4期18-23,共6页Acta Petrolei Sinica

基　　金：中国石油天然气集团公司"九五"科技攻关 (970206)项目部分研究成果

摘　　要：华北北部中、上元古海相地层是地球上最古老的沉积岩地区之一。冀北露头区大量的油苗分布是该套地层生烃的直接证据 ,在冀中覆盖区“古潜山”油藏的精细油源对比证实了部分原油为原生油 ,进一步说明中、上元古界地层有良好的生烃潜力 ,主要发育 5套烃源层系。按本区海相地层有机质丰度评价标准衡量 ,页岩中下马岭组、洪水庄组有机碳平均值达到 1 84%～ 2 2 1% ,为好烃源层 ;碳酸盐岩中铁岭组、高于庄组有机碳平均值达到 0 2 %～0 2 9% ,为较好烃源层 ;雾谜山组有机碳平均 0 12 % ,部分层段为较好烃源层。烃源岩有机质热演化程度高 ,多数地区在高成熟—过成熟阶段 (湿气—干气阶段 ) ,但冀北坳陷基本处在生油—凝析油—湿气阶段 ,宣龙坳陷下花园地区处在生油阶段。冀北坳陷是探索原生油藏的有利地区 ,冀中北部是寻找天然气藏的有利地区。Middle_Upper Proterozoic marine facies strata is one of the oldest areas sedimentary rock in the northern China.The sedimentary sequence consists of carbonates with intercalations of shales.A great deal of oil seepages and the from comparison of oil with source rocks in outcrop zone or in overlie zone show that the source rock of Middle_Upper Proterozoic may be able to generate hydrocarbon.The five strata of source rocks are distributed in this area.The portion shale strata are evaluated as the best source rock.The average values of organic carbon are 1.84%～ 2.21% in Xiamaling and Hongshuizhuang areas.A lot of carbonate rock strata may be evaluated as the better source rock.The average values of organic carbon are 0.2%～0.29% in Tieling and Gaoyuzhuang areas.The average values of organic carbon is 0.2% in Wumishan formation,and some member of the formation are the better source rock.A majority of organic matter of source rock may be highly evolved to condensate_wet_methane zone.The organic matter of source rock of Jibei depression may be evolved into oil generation_condensate_wet zone,and that of Xiahuayuan region be evolved into oil generative rock.The result of research shows that Jibei depression is the best region for exploring oil reservoirs,and Jizhong depression is the best region for exploring gas reservoirs.

关 键 词：烃源岩 生烃潜力 勘探前景 中元古界 上元古界 华北北部 

分 类 号：TE122.3[石油与天然气工程—油气勘探]