摘要
综合录井、测井及地球化学测试资料的研究,对高力罕凹陷查干诺尔洼槽烃源岩层段进行了分析。根据有机质丰度参数分析可知,阿尔善组有机质丰度高,发育中等一好烃源岩,平面上洼槽沉积中心有机质丰度高,向次洼和边缘相带逐渐降低。阿尔善组3+4段烃源岩有机质类型主要为Ⅲ-Ⅱ_1型;阿尔善组2段烃源岩有机质类型主要为Ⅱ_2-Ⅱ_1型;阿尔善组1段烃源岩有机质类型主要为Ⅱ_1-Ⅰ型。主要烃源岩层段的生烃强度等值线图与TOC等值线图有一定的对应关系,均受沉积相带的控制,洼槽沉积中心有机质丰度高,生烃强度也大。烃源岩最有利区域分布在延高8-延高7-延高10-延高2井区和延高4井区。通过对该区烃源岩深入研究,寻找有利烃源岩发育区,结合储层及构造研究可预测该洼槽阿尔善组含油有利区带。
We analyzed the hydrocarbon source rocks in Chagannuoer trough of Gaolihan sag based on comprehensive mud logging,well logging and geochemical test data.According to organic matter abundance parameters,it was known that Aershan Formation had high organic matter abundance and developed medium-good hydrocarbon source rocks,high organic matter abundance at subsag depocenter horizontally and gradually declining organic matter abundance to subsags and marginal facies belt.The organic matter of source rocks is mainly Type Ⅲ-Ⅱ1 at Member 3＋4 of Aershan Formation;the organic matter of source rocks is mainly Ⅱ2-Ⅱ1 at Member 2 of Aershan Formation;the organic matter of source rocks is mainlyⅡ2-Ⅱ1 at Member 2 of Aershan Formation,and the organic matter of source rocks is mainlyⅡ1-Ⅰ at Member 1of Aershan Formation.Hydrocarbon generation intensity contour map of main hydrocarbon source rock has certain corresponding relationship with TOC contour map,both of which are controlled by sedimentary facies belt.Either organic matter abundance or hydrocarbon generation intensity is high at subsag depocenter.Yangao8-Yangao7-Yangao10-Yangao2 wellblock and Yangao4 wellblock are most favorable for hydrocarbon source rocks distribution.Favorable oil zones of Aershan Formation in the trough could be predicted by in-depth study on sources rocks in the area,seeking zones favorable for source rocks development,and combining with reservoir and tectonic study.
出处
《非常规油气》
2016年第1期21-26,共6页
Unconventional Oil & Gas
关键词
烃源岩
高力罕凹陷
有机质丰度
成熟度
hydrocarbon source rocks
Gaolihan sag
organic matter abundance
maturity
