柴达木盆地红柳泉地区下干柴沟组E_3~1Ⅰ和E_3~1Ⅱ砂层组沉积微相及沉积演化研究  

Sedimentary Microfacies and Evolution of Sand Members I and Ⅱ of Lower Ganchaigou Formation in Hongliuquan Area of Qaidam Basin

作　　者：董文举[1] 张道伟[1] 邵毅[1] 王彬[1] 刘振华[2] 

机构地区：[1]中国科学院地质与地球物理研究所气体地球化学重点实验室 [2]中国石油勘探开发研究院西北分院,甘肃兰州730020

出　　处：《天然气地球科学》2008年第1期111-115,共5页Natural Gas Geoscience

基　　金：国家重点基础研究发展计划(“973”)项目(编号:2006CB202305);中国科学院知识创新工程重要方向项目(编号:KZCX3-SW-147)联合资助

摘　　要：柴达木盆地红柳泉地区下干柴沟组E31可划分出4个砂层组,在对下干柴沟组E31Ⅰ和E31Ⅱ砂层组岩心的观察描述和沉积相的电性特征分析基础上,研究了这2个砂层组的沉积微相,并根据微相模式识别和单井相分析,建立了沉积序列和沉积演化模式,并结合剖面沉积微相和砂岩含量和分布,绘制了E31Ⅰ和E13Ⅱ砂层组的沉积微相平面图,结果表明,红柳泉地区下干柴沟组E13Ⅰ和E31Ⅱ砂层组发育有三角洲前缘水下河道砂体,前缘席状砂体也有较好的好育,二者均是储集砂体发育的有利相带。By the observation and description of field geological profiles and cores, sand is divided into four members in the Lower Ganchaigou Formation （E3^1） in the Hongliuquan area of the Qaidam basin. This paper analyzes the sand members ⅠandⅡ. Through integrating sedimentary microfacies of the profile as well as content and distribution of the microfacies sandstone, ichnographies of the sedimentary microfacies in the area are protracted. Based on the analysis of electrical characteristics of the sedimentary facies, the pattern recognition of the sedimentary microfacies and the analysis of single-well facies, the sedimentary succession and the model of sedimentary evolution ar.e established. The results show that subaqueous channel sandbodies and sheet sandbodies of deltafront are well developed in the sand members ⅠandⅡof the Lower Ganchaigou Formation. Through the study of sedimentary microfacies and evolution, favorable reservoir facies are found in the area, consequently providing a geological foundation for progressive exploration in the oilfield.

关 键 词：沉积微相 下干柴沟组 红泉地区 柴达木盆地 滚动勘探 

分 类 号：TE122.2[石油与天然气工程—油气勘探]