| 摘要: |
| 笔者对钻井和测井资料综合分析认为:陇东华池油田延长组长3油层组形成于湖盆逐渐萎缩、三角洲沉积不断向湖盆进积期,主要发育有三角洲平原分流河道、洪泛平原、三角洲前缘水下分流河道、河口坝、复合式坝、远砂坝和分流间湾等沉积微相,沉积环境由三角洲前缘演变为三角洲平原,储层砂体主要为三角洲前缘的水下分流河道、河口坝和复合式坝砂岩。沉积微相对城华地区延长组长3油层组含油气性的控制主要表现在3个方面:①沉积微相控制着生储盖的组合;②沉积微相控制着储层砂体的展布;③沉积微相影响着储层的储集性能。 |
| 关键词: 沉积微相|含油性|延长组|城华地区 |
| DOI： |
| 附件 |
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| 基金项目:中国科学院资源环境领域知识创新工程重要方向(KZCX3-SW-128-04) |
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| Sedimentary microfacies and hydrocarbon potential of the Chang3 oil measures in the Yanchang Formation,Huachi Oil Field,Ordos Basin |
| LI Feng-jie, WANG Duo-yun |
(1. Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, Sichuan, China;
2. College of Resources Science&Technology, Beijing Normal University, Beijing 100875, China) |
| Abstract: |
| The Chang3 oil measures in the Yanchang Formation of the Huachi Oil Field in the Ordos Basin were formed during the lacustrine basin collapse and basinward progradation of the delta deposits.The sedimentary microfacies mainly consist of delta plain distributary channel,flood plain,delta-front subaqueous distributary channel,channel-mouth bar,composite bar,distal bar and interdistributary bay microfacies.Sedimentary environments have gone through the evolution from the delta front to the delta plain.The reservoir sandstones are dominantly composed of delta-front subaqueous distributary channel sandstones,channel-mouth bar sandstones and composite bar sandstones.The controls of the above-mentioned sedimentary microfacies on the hydrocarbon potential of the Chang3 oil measures in the Yanchang Formation in the Chenghua region include:(1) the controls on source-reservoir-seal associations;(2) the controls on the distribution of reservoir sandstones,and(3) the controls on the reservoir quality. |
| Key words: sedimentary microfacies|hydrocarbon potential|Yanchang Formation|Chenghua region |
