阜康断裂带中段三叠系克拉玛依组沉积微相及优质储层分布  

Distribution of sedimentary microfacies and high-quality reservoir of Triassic Karamay Formation in the middle part of Fukang fracture zone

作　　者：雷章树 印森林 程皇辉[3] 姜涛[3] 但顺华 陈旭 张小红[3] Lei Zhangshu;Yin Senin;Cheng Huanghui;Jiang Tao;Dan Shunhua;Chen Xu;Zhang Xiaohong(School of Geoscience,Yangtze University,Wuhan 430100;Research Institute of Mud Logging Technology and Engineering,Yangtze University,Jingzhou,Hubei 434023;Research Institute of Exploration and Development,Xinjiang Oilfield Company Zhundong Oil Production Plant,Fukang,Xinjiang 831511)

机构地区：[1]长江大学地球科学学院,武汉430100 [2]长江大学录井技术与工程研究院,湖北荆州434023 [3]新疆油田公司准东采油厂,新疆阜康831511

出　　处：《地质科学》2023年第4期1255-1276,共22页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：油气藏地质及开发工程国家重点实验室(西南石油大学)开放基金项目(编号:PLN2022_19)资助。

摘　　要：处于勘探评价阶段的阜康断裂带中段三叠系克拉玛依组为中孔特低渗储层,沉积微相类型还不明确,优质储层的识别也存在难度,导致沉积微相对优质储层的控制亟待深入研究。综合利用岩心、岩屑、分析化验、地震、测井和试油试采资料,开展了岩心描述、沉积相类型识别及微相划分、单井、连井及平面互动的沉积微相分布演化特征和相控优质储层分布等工作。研究表明:1)据重矿物相对含量特征分布来看,稳定矿物类型的钛铁矿相对含量从南向西北逐渐减少,而极稳定矿物类型的白钛石和锆石相对含量则逐渐增多,表明研究区以南部物源为主。2)据岩心精细描述发现,克拉玛依组岩性可以分为5类,包括砂砾岩、含砾/中粗砂岩、含砾/粉细砂岩、泥质砂岩和泥岩,发育7种典型沉积构造。3)据岩心相、测井曲线响应和地震反射特征,研究目的层为辫状河三角洲沉积;工区主要发育三角洲前缘亚相,包括5种微相类型,建立了不同沉积微相的测井相模式;综合单井、连井和平面分析发现,5个砂组自下而上朵体范围与数量变化十分明显,自下而上朵体数量由少变多再变少,范围由小变大再变小的规律,其内部骨架砂体厚度和平面范围差异也较大。4)开展了沉积微相控制下孔、渗、饱参数分布研究,结合试油试采资料,综合确定了不同类别优质储层分布特征。The Triassic Karamay Formation in the middle section of the Fukang fracture zone,which is in the petroleum exploration and evaluation stage,is a medium-porosity,extra-low-permeability reservoir,whose type of sedimentary micro-facies is still unclear and the identification of high-quality reservoirs is difficult,resulting in the control of the sedimentary micro-facies to high-quality reservoirs needs to be researched.Multiply using the data of cores,cuttings,analytical tests,seismic,logging and oil test,we carried out core description,identification of sedimentary facies types and micro-facies division,distribution evolution characteristics of sedimentary micro-facies from single well to correlation wells and plane interaction,and sedimentary micro-facies controlled high-quality reservoirs.The study shows that:1)according to the distribution characteristics of the contents of heavy minerals,the contents of ilmenite of unstable minerals gradually decreased from south to northwest,while the relative contents of white titanite and zircon of extremely stable minerals gradually increased,indicating that the study area is dominated by the southern source.2)The accurate description of cores reveals that the lithology of the Karamay Formation can be divided into five categories,including the sandy conglomerate,conglomeratic/grit,conglomeratic/silty sand rocks,argillaceous sandstone and mudstone,seven typical sedimentary structure.3)According to the characteristics of core lithofacies,well logging response and seismic reflection,the target layer is braided river delta deposition;the work area mainly develops delta front sub facies,including five microfacies types,establishing the logging facies models of sedimentary microfacies.Comprehensive single well,connected well and plane,it is found that the scale and quantity of the five sand groups vary very obviously from bottom to top of the sand bodies,and the numbers from less to more and then less,and the scale changes from small to large and then to small.Meanwhile,the thick

关 键 词：井震结合 沉积微相 优质储层 克拉玛依组 阜康断裂带中段 

分 类 号：P618.13[天文地球—矿床学]