塔里木盆地塔河油田TP12-8井区白垩系舒善河组上段沉积特征  

Sedimentary characteristics of Upper Member of Shushanhe Formation of Cretaceous in TP12-8 well area of Tahe Oilfield,Tarim Basin

作　　者：陈鹏[1] 张丹扬 朱洪武 殷佳伟 王德海[1] CHEN Peng;ZHANG Danyang;ZHU Hongwu;YIN Jiawei;WANG Dehai(College of Earth Sciences,Jilin University,Changchun 130061,China)

机构地区：[1]吉林大学地球科学学院,长春130061

出　　处：《世界地质》2025年第1期70-81,共12页World Geology

基　　金：国家自然科学基金项目(41402088)。

摘　　要：为查明沉积储层的多样性与复杂性,厘清塔里木盆地塔河油田白垩系舒善河组的沉积特征及砂体发育规律,剖析沉积微相与储层砂体分布之间的关系。采用岩心分析以及测井分析方法识别岩性标志,主要包括岩石的颜色、成分、沉积结构、沉积构造、岩石类型及岩性组合;识别测井标志,包括定性方面的测井曲线特征以及定量方面的测井资料特征。采用系统的沉积学分析方法,主要为地质学方法,总结岩性及测井沉积相标志,建立沉积微相划分标准;通过单井相与剖面相分析垂向上和剖面上沉积相类型及其演化特征;利用砂地比分析沉积微相平面特征;利用砂体厚度分析砂岩在区域上的分布规律。综合岩心与测井数据,建立了1套沉积微相划分标准,绘制了1个单井相图及横纵2个剖面相图,完成了4个小层的沉积微相平面图及砂体展布图,并总结了区域辫状河三角洲前缘的沉积模式。TP12-8井区舒善河组上段属于浅水缓坡型辫状河三角洲前缘沉积体系,识别出水下分流河道、水下分流河道间及河道侧缘3个沉积微相,物源来自托甫台以南地区。由于沉积环境为大型氧化宽浅湖盆,因此具有独特的沉积特征;不同于一般的水下沉积,TP12-8井区沉积物呈氧化色如棕色;砂体叠片发育,以细砂岩为主,平面上约占总面积的75%,砂体厚度可达1.4~23.9 m;水下分流河道是研究区主体沉积相,河口坝不发育,河道入湖之后持续推进延伸,呈条带状贯穿整个研究区,宽度达1.5~9.0 km。In order to investigate the diversity and complexity of sedimentary reservoirs,to clarify the sedimentary characteristics and sand body development rules of the Cretaceous Shushanhe Formation(K 1 s)in Tahe Oilfield,Tarim Basin,and to analyze the relationship between sedimentary microfacies and reservoir sand body distribution,core analysis and logging analysis methods were used to identify lithological markers,mainly including rock color,composition,sedimentary texture,sedimentary structure,rock type and lithological associations,and to identify logging markers,including qualitative logging curve characteristics and quantitative logging data characteristics.Adopting systematic sedimentological analysis methods,mainly geological methods,the authors summarized lithology and logging sedimentary facies markers,and established sedimentary microfacies classification standards,and analyzed sedimentary facies types and their evolutionary characteristics vertically and on the profile through the study of single-well facies and profile facies.We also analyzed the plane characteristics of sedimentary microfacies by using ratio of sand to stratum,and the distribution pattern of sandstone in the region by using thickness of sand body.Based on the core and logging data,a sedimentary microfacies division standard was established,one single-well sedimentary facies diagram and two horizontal and vertical profile facies diagrams were drawn;while the sedimentary microfacies plane and sand body distribution of four small layers were completed,and the regional braided river delta front sedimentary model was summarized.The Upper Member of Shushanhe Formation(K 1 s 3)in TP12-8 well area belongs to the shallow water gentle slope braided river delta front sedimentation system,which identifies three sedimentary microfacies of the subaqueous distributary channel,the subaqueous interdistributary channel and the channel edge,and the provenances come from the southern area of Tuofutai.Because the sedimentary environment is a large oxidized wi

关 键 词：沉积特征 舒善河组 辫状河三角洲前缘 沉积微相 塔河油田 塔里木盆地 

分 类 号：P618.13[天文地球—矿床学]