姬塬油田西部延长组长6段沉积特征及沉积模式  

Sedimentary Characteristics and Sedimentary Mode of Chang 6 Member of Yanchang Formation in the West of Jiyuan Oilfield

作　　者：申锦江 唐振兴[3] 王博涛[4] 何磊[4] 赵家宏[3] 鲍志东[1,2] 杨尚锋 解雅然 SHEN Jinjiang;TANG Zhenxing;WANG Botao;HE Lei;ZHAO Jiahong;BAO Zhidong;YANG Shangfeng;XIE Yaran(College of Geosciences,China University of Petroleum (Beijing),Beijing 102249,China;State Key Laboratory of Petroleum Resource and Prospecting,China University of Petroleum (Beijing),Beijing 102249,China;Research Institute of Exploration and Development,PetroChina Jilin Oilfield Company,Songyuan,Jilin 138001,China;The Fifth Oil Production Plant,PetroChina Changqing Oilfield Company,Xi'an,Shaanxi 710020,China)

机构地区：[1]中国石油大学(北京)地球科学学院,北京102249 [2]中国石油大学(北京)油气资源与探测国家重点实验室,北京102249 [3]中国石油吉林油田分公司勘探开发研究院,吉林松原138001 [4]中国石油长庆油田分公司第五采油厂,陕西西安710021

出　　处：《西安石油大学学报（自然科学版）》2020年第3期1-9,共9页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：长庆油田科学研究项目“姬塬油田盐池西部长6油藏成藏条件分析及有利目标区优选”(2017CWFZ-040)。

摘　　要：为明确姬塬油田西部长6段沉积微相类型及其演化规律,综合利用岩心、测井、分析测试等基础资料,分析长6段岩性、沉积构造、粒度及测井相标志等,系统地对长6段沉积相类型及平面展布规律进行研究,在此基础上,建立了长6段沉积演化模式,并分析了沉积微相对储层的影响。结果表明:姬塬油田西部长6沉积时期湖盆萎缩,水体变浅,发育三角洲前缘亚相,包括水下分流河道、水下天然堤和支流间湾微相,水下分流河道是主干微相。水下分流河道呈北西—南东向条带状展布,砂体展布范围逐渐增大。长62和长61时期,河道砂体厚,平面连片分布,垂向相互叠置,物性好,易发生建设性成岩作用,是优质砂体分布的主要层位,也是下一步重点勘探层位。In order to clarify the types and evolution law of sedimentary macrofacies of Chang 6 member in the west of Jiyuan Oilfield,based on the basic data of core,well logging and testing,the lithology,sedimentary structure,grain size and logging facies mark of the Chang 6 member are analyzed,the types and plane distribution law of sedimentary facies of the Chang 6 member are systematically studied.On this basis,the sedimentary evolution mode of the Chang 6 member is established,and the influence of sedimentary microfacies on reservoir is analyzed.The results show that during the Chang6 sedimentary period in the west of Jiyuan Oilfield,the lake basin shrank,the water body became shallow,and the delta front subfacies developed,including the underwater distributary channel,the underwater natural dike and the tributary bay microfacies.The underwater distributary channel is main microfacies,it distributed in a NW-SE direction,and the distribution range of its sand body gradually increases.In the period of Chang 62 and Chang 61,the channel sand body is thick,its distribution is continuous on plane and overlapping vertically.The channel sand body is of good physical properties,easy to occur constructive diagenesis.Chang 62 and Chang 61 are the main horizons of high-quality sand body distribution,and also the next key exploration horizons.

关 键 词：沉积微相 沉积模式 长6段 姬塬油田西部 

分 类 号：TE122.1[石油与天然气工程—油气勘探]