济阳坳陷古新世孔店组生烃潜能评价  

Evaluation of the hydrocarbon-generation potential for the Kongdian Formation of Palaeocene in Jiyang depression

作　　者：陈建渝[1] 彭晓波[1] 张冬梅[1] 冯刚[2] 杨泽蓉[2] 游兴友[2] 高维依[2] 

机构地区：[1]中国地质大学 [2]中国石化胜利油田地球物理勘探开发公司

出　　处：《石油勘探与开发》2002年第3期17-20,共4页Petroleum Exploration and Development

摘　　要：济阳坳陷深层油气勘探能否有更大突破的焦点之一 ,是孔店组 (主要是孔二段 )的生烃潜能。惠民凹陷是济阳坳陷的孔店组沉降中心 ,其地层厚度高达 40 0 0～ 5 0 0 0m ;其中孔二段分布范围广 ,含有暗色泥岩 ,主要为浅湖—沼泽相沉积 ,推测在洼陷中心会出现半深湖相沉积 ,应是孔店组最有生烃潜力的地区。根据已有的少量的有机地化分析结果 ,判断孔二段烃源岩有机质丰度中等—差 ,类型为Ⅲ型 ,成熟度高 ,以生成轻质油和天然气为主。济阳坳陷东部五号桩洼陷孔二段烃源岩有机质丰度中等 ,类型为Ⅱ型 ,成熟度高 ,以生成凝析油为主。黄骅坳陷南区和潍北凹陷是以孔二段为主要烃源岩的含油气区。与它们对比 ,惠民凹陷的孔店组类似于潍北凹陷 ,五号桩洼陷的孔店组更类似于黄骅坳陷南区。在济阳坳陷可能形成以孔二段为烃源岩、以孔一段砂岩为储集层、以其上部的厚层泥岩为盖层的封闭自源型含油气系统。图 2表 4参 5 (陈建渝摘 )The hydrocarbon-generating potential of Kongdian Formation (Ek), in particular, its second Member (Ek_2) is a key of the breakthrough in the petroleum exploration at great depth of the Jiyang basin. The Huiming depression is the Ek sinking center with big thickness as high as 4000-5000m. The Ek_2 has extensive distribution and dark mudstone of shallow lake-swamp depositional facies. It can be expected the deposition of deep lake exists in the center of the depression. It's obvious that Huiming depression is the sinking center and would be best prospect of the Kongdian Formation in the Jiyang basin. According to few analytical data of geochemistry, the source rock (SR) of the Ek_2 has fair organic richness and type Ⅲ organic matter with high maturity and can generate light oil and gas. The Ek_2 SR in Wuhaozhuang depression in eastern Jiyang basin has fair organic richness and type Ⅱ organic matter with high maturity and can generate light oil. The south part of Huanghua depression and the Weibei depression have Ek_2 SR, and produce oil and gas. The Ek_2 SR in the Huiming depression is similar with that in the Weibei depression, and the Ek_2 SR in the Wuhaozhuang depression is similar with that in the south part of Huanghua depression. It's much possible to form the self-original, closed petroleum system with Ek_2 SR, reservoir sandstone and cap-rock thick mudstone in Ek_1 in the Jiyang basin.

关 键 词：济阳坳陷 古新世 孔店组 生烃潜能 评价 含油气系统 烃源岩 

分 类 号：P618.130.2[天文地球—矿床学] TE12[天文地球—地质学]