塔西南石炭系卡拉沙依组烃源岩评价与优选  

Evaluation and optimal selection of Carboniferous Kalashayi Formation source rocks in southwestern Tarim Basin

作　　者：张福顺[1] 郑启明 胡瀚文 姚威 张坦 马红强 ZHANG Fushun;ZHENG Qiming;HU Hanwen;YAO Wei;ZHANG Tan;MA Hongqiang(Sinopec Petroleum Exploration and Production Research Institute,Beijing 102206,China;Petroleum Geology Technology Co.,Ltd.,Beijing 100044,China;Wuxi Institute of Petroleum Geology,Sinopec Petroleum Exploration and Production Research Institute,Wuxi,Jiangsu 214126,China)

机构地区：[1]中国石化石油勘探开发研究院,北京102206 [2]北京派特杰奥科技有限公司,北京100044 [3]中国石化石油勘探开发研究院无锡石油地质研究所,江苏无锡214126

出　　处：《油气藏评价与开发》2024年第4期647-656,共10页Petroleum Reservoir Evaluation and Development

基　　金：中国石化科技部科技攻关项目“塔里木盆地古生界碎屑岩油气成藏条件与区带优选”(P21049-2)。

摘　　要：塔西南地区石炭系油气显示丰富,为明确塔西南石炭系卡拉沙依组烃源岩生烃潜力,通过干酪根镜鉴、有机碳测试及盆地模拟等技术方法,对卡拉沙依组烃源岩进行研究评价,结果显示:卡拉沙依组烃源岩主要为Ⅲ型干酪根,TOC(总有机碳)含量介于0.2%~2.8%,平均值为1.0%,Ro(镜质体反射率)均超过0.7%。但烃源岩热演化过程存在差异,巴楚地区石炭系烃源岩仅在海西晚期一次生烃,麦盖提斜坡石炭系烃源岩存在海西晚期和喜山期两期生烃,结合烃源岩厚度、TOC、成熟度和生排烃史等多种因素,认为麦盖提斜坡区卡拉沙依组烃源岩均已成熟并持续生烃,西部山前带烃源岩品质及生烃强度最优。The study explores the abundant oil and gas reserves in the Carboniferous of the southwestern Tarim Basin,with a specific focus on the source rocks of the Carboniferous Kalashayi Formation.By conducting kerogen identification,total organic carbon(TOC)testing,and thermal simulation,the research revealed that these mudstone source rocks primarily consist of Type Ⅲ kerogen.Their TOC ranged from 0.2% to 2.8%,averaging 1.0%.The thermal maturity of the rocks,indicated by a vitrinite reflectance(Ro)greater than 0.7%,varied across different areas.The hydrocarbon generation history of these source rocks was also examined.In the Magaiti slope,the rocks underwent two phases of hydrocarbon generation:one during the Late Hercynian period and another during the Himeyama period.In contrast,in the Bachu bulge,there was only one hydrocarbon generation phase,occurring during the Late Hercynian period.The source rocks in the Magaiti slope are considered mature and are still generating hydrocarbons,influenced by factors such as source rock thickness,TOC,maturity,and the history of hydrocarbon generation and excretion.Furthermore,the source rocks in the western piedmont zone were identified as having the best quality and the highest hydrocarbon generation intensity.

关 键 词：塔西南 石炭系 卡拉沙依组 烃源岩评价 热模拟 

分 类 号：TE122[石油与天然气工程—油气勘探]