鄂北杭锦旗地区太原组沉积微相分析  

The sedimentary microfacies of Taiyuan formation in the Hangjinqi area,the north of Ordos Basin

作　　者：郭顺[1,2] 闫继福[1,2] 郭兰[1] 丁超[1] 

机构地区：[1]西北大学地质学系,陕西西安710069 [2]延长油田股份有限公司勘探处,陕西延川717208

出　　处：《西北大学学报（自然科学版）》2009年第2期283-287,共5页Journal of Northwest University（Natural Science Edition）

摘　　要：目的探究杭锦旗地区太原组沉积特征和砂体展布规律。方法在岩心观察的基础上,分析太原组的岩性、结构、构造特征,结合测井相资料,研究储集层沉积特征和相带展布规律,指出有利储集相带和暗色泥岩展布特征。结果太原组发育扇三角洲和障壁海岸沉积。扇三角洲进一步划分为扇三角洲平原、扇三角洲前缘和前扇三角洲亚相;障壁海岸体系主要为潮坪沉积。结论有利储集砂体主要为扇三角洲平原辫状分流河道及水下分流河道砂体,分布受沉积特征控制。Aim To find out depositional feature and sand bodies distribution law of Taiyuan formation in the Hangjinqi area. Methods Based on the observation of core, it is easy to analyze the characteristics of lithology, texture and structure of Taiyuan formation. Combined with the well log facies, the depositional feature and distribution law of oil-bearing bed of Taiyuan formation would be made sure. Favorable reservoir facies belts and distribution feature of the hydrocarbon source rock are being displayed. Results Fan delta and barrier coast sedimentary are widely developed in the Taiyuan formation. Three subfacies are included in the fan delta： fan delta-plain, fan delta-front and fan prodelta. Tidal sedimentary is the main deposition in the barrier coast system. Conclusion Sand bodies of fan delta-plain braided distrbutary channel and underwater distrbutary channel are main reservoir bodies in the area. The characteristics of deposition control the distribution of reservoir bed.

关 键 词：杭锦旗地区 太原组 沉积体系 扇三角洲 障壁海岸 

分 类 号：P512.2[天文地球—地质学]