四川盆地东北部凉高山组上段烃源岩评价  

Evaluation of hydrocarbon source rocks in the upper member of Lianggaoshan Formation in Northeast Sichuan Basin

作　　者：王逸兴 韩辉[1,2,3] 任仕猛 拜文华 武文杰[1] 何春臣 王江 WANG Yixing;HAN Hui;REN Shimeng;BAI Wenhua;WU Wenjie;HE Chunchen;WANG Jiang(School of Geoscience and Technology,Southwest Petroleum University,Chengdu,Sichuan,610500,China;Natural Gas Geology Key Laboratory of Sichuan Province,Southwest Petroleum University,Chengdu,Sichuan,610500,China;Petrochina Key Laboratory of Unconventional Oil and Gas,Reservoir Evaluation Branch,Southwest Petroleum University,Chengdu,Sichuan,610500,China;The First Branch Mud Logging Company,CNPC Bohai Drilling Engineering Co.Ltd.,Tianjin,300457,China;Research Institute of Petroleum Exploration and Development,Beijing 100083,China)

机构地区：[1]西南石油大学地球科学与技术学院,四川成都610500 [2]天然气地质四川省重点实验室,四川成都610500 [3]中石油非常规油气重点实验室西南石油大学储层评价分室,四川成都610500 [4]中国石油集团渤海钻探工程有限公司第一录井分公司,天津300457 [5]中国石油勘探开发研究院,北京100083

出　　处：《世界石油工业》2025年第2期58-68,共11页World Petroleum Industry

基　　金：国家自然科学基金面上项目“陆相页岩有机孔隙差异发育机理及效应研究”(41972161);四川省自然科学基金项目“四川盆地五峰组—龙马溪组海相页岩有机质生气、成孔和石墨化机理研究”(2024NSFSC0088)。

摘　　要：四川盆地是中国陆相页岩油气资源勘探开发的主要目标区之一,侏罗系凉高山组作为该区重要油气资源富集层系,近年来取得了一系列油气发现,显现出该层系良好的勘探潜力,但前人相关研究主要集中在四川盆地东部和中部地区,对该盆地东北部凉高山组研究也主要集中于个别区块,尚无系统的整体性研究成果。为了系统研究四川盆地东北部凉高山组上段烃源岩特征、准确评价其油气资源潜力、为该地区油气勘探开发提供有力依据,采用钻井取心及岩屑资料,运用油气地球化学方法,对研究区凉高山组上段烃源岩的有机地化特征展开分析。研究结果表明:该区域凉上段主要发育灰色和灰黑色泥页岩,其总有机碳含量(TOC)介于0.5%~1.5%,S_(1)+S_(2)平均值为3.63 mg/g,属于一般~好烃源岩,有机质类型为Ⅱ型,镜质体反射率R_(o)范围在0.9%~1.9%,处于成熟-高成熟阶段。其生气强度及生油强度分别为(0.5~3)×10^(8)m^(3)/km^(2)和(40~65)×10^(4)t/km^(2)。通过计算生烃量并绘制有利生烃区预测图,发现有利生烃区位于平昌—渠县—营山一带,总生气量及生油量分别达到1.3×10^(12)m^(3)和1.3×10^(10)t。结论认为,四川盆地东北部凉高山组上段烃源岩能为油气藏的形成提供充足油气来源,具有巨大的勘探潜力,该项研究成果为后续凉高山组油气资源开采提供了依据和参考的借鉴与参考。The Sichuan Basin is one of the major basins for the exploration and development of continental shale oil and gas resources in China,and the Jurassic System,as an important oil and gas resource-rich formation in the Sichuan Basin,in recent years,there are good oil and gas discoveries in the Jurassic Lianggaoshan Formation in the Sichuan Basin,showing that the Jurassic Lianggaoshan Formation has good exploration potential,but the previous studies mainly focused on the eastern and central regions of the Sichuan Basin,and the studies on the Lianggaoshan Formation in northeast Sichuan area also focused on individual blocks,and there is no systematic and holistic study yet.In order to systematically study the characteristics of source rocks in the upper member of Lianggaoshan Formation in northeastern Sichuan Basin,accurately evaluate its resource potential,and provide a strong basis for oil and gas exploration and development in this area.The organic geochemical characteristics of source rocks in the upper member of Lianggaoshan Formation in northeastern Sichuan Basin were analyzed by means of drilling core and cuttings data and oil and gas geochemical methods.The results show that the upper member of the Lianggaoshan Formation mainly develops grey and greyish-black mud shale,and its total organic carbon content(TOC)is in the range of 0.5%~1.5%,and the average value of S_(1)+S_(2) is 3.63 mg/g,which belongs to the category of average-good hydrocarbon source rock,the organic matter type isⅡ,the reflectance R_(o) of specular body is 0.9%~1.9%,and it is in the stage of maturity-high maturity.The gas generation intensity and oil generation intensity are in the range of(0.5~3)×10^(8)m^(3)/km^(2)and(40~65)×10^(4)t/km^(2)respectively.By calculating the amount of hydrocarbon generation and drawing the prediction map of favorable hydrocarbon generation area,it is found that the favorable hydrocarbon zone is located in the Pingchang—Quxian—Yingshan area,with the total gas and oil production reaching 1.3×10^(12)m^(3)an

关 键 词：四川盆地东北部 凉高山组 烃源岩 有机质丰度 有机质成熟度 

分 类 号：TE122[石油与天然气工程—油气勘探]