鄂尔多斯盆地陇东地区三叠系延长组浅水三角洲砂体特征及厚层砂体成因  

Distribution of shallow water delta sand bodies and the genesis of thick layer sand bodies of the Triassic Yanchang Formation,Longdong Area,Ordos Basin

作　　者：刘翰林 邱振[1] 徐黎明[3] 王凤琴 童强 蔺嘉昊 尹帅 王文强 LIU Hanlin;QIU Zhen;XU Liming;WANG Fengqin;TONG Qiang;LIN Jiahao;YIN Shuai;WANG Wenqiang(PetroChina Research Institute of Petroleum Exploration&Development,Beijing 100083,China;School of Earth and Space Sciences,Peking University,Beijing 100871,China;PetroChina Changqing Oilfield Company,Xi’an 710021,China;College of Geosciences and Engineering,Xi’an Shiyou University,Xi’an 710065,China;State Key Laboratory of Continental Dynamics/Department of Geology,Northwest University,Xi'an 710069,China;No.3 Gas Production Plant,PetroChina Changqing Oilfield Company,Wushenqi 017300,China;State Key Laboratory of Petroleum Resources and Prospecting,College of Geosciences,China University of Petroleum(Beijing),Beijing 102249,China)

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]北京大学地球与空间科学学院,北京100871 [3]中国石油长庆油田公司,西安710021 [4]西安石油大学地球科学与工程学院,西安710065 [5]西北大学大陆动力学国家重点实验室/地质学系,西安710069 [6]中国石油长庆油田公司第三采气厂,内蒙古乌审旗017300 [7]油气资源与探测国家重点实验室(中国石油大学(北京)),北京102249

出　　处：《石油勘探与开发》2021年第1期106-117,共12页Petroleum Exploration and Development

基　　金：国家重点基础研究发展计划(973计划)项目(2014CB239000);中国石油科学研究与技术开发项目(YJXK2019-16)。

摘　　要：基于47口井取心资料及130口井测井资料,综合分析鄂尔多斯盆地陇东地区三叠系延长组长82亚段浅水三角洲主要砂体类型,明确累计厚度大于20 m的厚层砂体分布特征,并划分厚层砂体成因类型。根据研究区厚层砂体的形态和发育位置可将其分为两类:第一类厚层砂体呈“宽条带状”分布于平均高水位线及平均低水位线之间;第二类厚层砂体沿平均低水位线两侧分布,呈不规则“坨状”。基于沉积物体积分配原理和可容空间变化规律,陇东地区长82亚段厚层砂体成因类型可分为高可容空间叠置分流河道砂体型和低可容空间叠加复合砂体型。Based on the cores from 47 wells and logging data of 130 wells,the main types of sand bodies in the shallow water delta of the Chang 82 sub-member in the Triassic Yanchang Formation,Longdong Area,Ordos Basin were comprehensively analyzed,the distribution characteristics of sand bodies more than 20 m thick were identified,and the genetic types of the thick sand bodies were sorted out.In this region,thick-bed sand bodies can be divided into two types according to the shape and position:type 1 is the sand body in wide strip and is distributed between the average high water mark and the average low water mark;type 2 is distributed on both sides of the average low water mark and is in irregular lump shape.Based on the principle of the volume distribution of sediments and the change rule of accommodation space,the genetic models of two types of thick-bed sand bodies in the Chang 82 sub-member are high-capacity stacked distributary channel sand body model and low-capacity spatial overlay compound sand body model,respectively.

关 键 词：鄂尔多斯盆地 陇东地区 浅水三角洲 砂体分布规律 砂体成因类型 三叠系延长组 长82亚段 

分 类 号：TE122.3[石油与天然气工程—油气勘探]