大安油田扶余油层沉积微相研究  

Research on Sedimentary Microfacies of Fuyu Reservoir in Da'an Oilfield

作　　者：韩承霖 张云峰[1] 蒋政[2] 

机构地区：[1]东北石油大学地球科学学院,黑龙江大庆163318 [2]大庆油田有限责任公司第五采油厂第一油矿,黑龙江大庆163513

出　　处：《当代化工》2015年第8期1835-1838,共4页Contemporary Chemical Industry

基　　金：国家高技术研究发展计划项目(863计划)(2013AA064903);国家重点基础研究计划(973计划)前期研究专项(2012CB723102)

摘　　要：大安地区扶余油层作为主力的产油层系,多年以来一直都是油气勘探开发的重点层位。通过岩心观察、钻井和测井、录井资料、普通薄片和前人研究等,在对研究区红75-9-1等五口取心井观察研究基础上,明确了沉积微相类型,建立了研究区测井相模式,绘制了各时间单元沉积微相图,分析扶余油层砂体展布特征和垂向演化规律。研究认为:大安油田扶余油层是受西北物源控制的河控浅水三角洲沉积体系,研究区早期是三角洲分流平原亚相沉积,晚期是三角洲前缘亚相沉积,进一步可以识别出分流河道、河口坝、席状砂、天然堤、溢岸砂等沉积微相,砂体总体呈北西—南东相展布,垂向上研究区总体是水进湖侵的过程,在这一过程中又经历了两个次一级的"水退—水进"。分流河道砂体在研究区广泛发育,连片性好,砂体厚度大,物性较好,是主要的储层。Fuyu reservoir in Da＇an area is the main producing oil stratum, has been the focus layer of exploration and development of oil and gas for many years. In this paper, based on core observation,drillng and logging data, measurement normal thin-sections＇ and previous research, through observation of five coring wells such as Hong75-9-1 and so on, the sedimentary microfacies types were definited, the log phase mode was established, each time unit sedimentary microfacies graph was drawn, Fuyu reservoir sand distribution characteristics and vertical evolution were analyzed.The research suggests that,Fuyu reservoir in Da＇an oilfield is fluvial-controlled shallow-water deltaic depositional system controlled by northwest material source. Early the study area developed delta plain subfacies, delta front subfacies developed in the late, and then distributary channel,mouth bar, sheet sand,natural levee,spill bank sand and other microfacies can be identified. The whole sand spread direction is Northwest to Southeast.The whole progress is the water transgression lake transgression in vertical profile, and there are two secondary level ＂water regression-water transgression＂ in this progress.Distributary channel sand body in the study area widely developed, has good connection and large thickness and good physical property.

关 键 词：大安油田 扶余油层 沉积微相 分流河道 

分 类 号：TE122[石油与天然气工程—油气勘探]