塔里木盆地塔河地区石炭系烃源岩特征及展布  

Distribution and characteristics of the Carboniferous source rock in Tahe Oilfield,Tarim Basin,China

作　　者：张冬丽 先伟[2] ZHANG Dongli;XIAN Wei(Experimental Center,Northwest Branch of SINOPEC,Urumqi 830011,China;Research Institute of Exploration and Production,Northwest Branch of SINOPEC,Urumqi 830011,China)

机构地区：[1]中国石油化工股份有限公司西北油田分公司实验检测技术中心,乌鲁木齐830011 [2]中国石油化工股份有限公司西北油田分公司勘探开发研究院,乌鲁木齐830011

出　　处：《成都理工大学学报（自然科学版）》2023年第6期673-689,705,共18页Journal of Chengdu University of Technology: Science & Technology Edition

摘　　要：通过地球化学法、多元线性法对塔河地区石炭系烃源岩进行识别,探讨烃源岩的空间分布。研究表明:石炭系烃源岩泥质岩有机碳分布于0.04%~1.28%,平均值0.30%。碳酸盐岩有机碳丰度较好,有机碳分布于0.04%~0.44%,平均值0.22%。泥质岩有机碳达标率24.24%,碳酸盐岩有机碳达标率87.5%。碳酸盐岩烃源岩有机质类型主要为Ⅱ~Ⅲ型,泥质岩有机质类型以Ⅲ型为主。塔河石炭系烃源岩R_(o)分布在0.53%~2.10%之间,大部分大于0.8%,处于成熟阶段。塔河石炭系烃源岩较差,加之生烃潜力(S1+S2)较低,为差烃源岩。石炭系烃源岩主要分布于塔河一区、塔河盐边地区、托甫台等地区。The Carboniferous source rocks in Tahe area are identified by geochemical method and multivariate linear method,and the spatial distribution of source rocks is discussed.The results show that the organic carbon in the shale rocks of the Carboniferous source rocks ranges from 0.04%to 1.28%,with an average of 0.30%,and the organic carbon abundance of carbonate rocks is good,with an organic carbon distribution ranging from 0.04%to 0.44%(average 0.22%).The organic carbon reaches the standard rate of 24.24%in shale rock and 87.5%in carbonate rock.It reveals that the organic matter of carbonate source rocks are mainlyⅡ-Ⅲtypes,and the organic matter types of argillaceous rocks are mainlyⅢtype.The distribution of Ro in Tahe Carboniferous source rocks ranges from 0.53%to 2.10%,most of which are greater than 0.8%,indicating that the source rocks are in the mature stage.The Carboniferous source rocks are mainly distributed in Tahe No.1 area,Yanbian area and Toputai area,and the development of Tahe Carboniferous source rocks are relatively poor,with a low hydrocarbon generating potential(S1+S2).

关 键 词：塔河油田 石炭系 烃源岩 有机质丰度 有机质类型 有机质成熟度 

分 类 号：P618.13[天文地球—矿床学]