二连盆地白北凹陷白垩系下统地震相特征  

Seismic Facies Characteristics of Lower Cretaceous in Baibei Sag,Erlian Basin

作　　者：郑立巍 董书宁 吕敏 石平舟 邱文波 陈刚 侯江 ZHENG Li-wei;DONG Shu-ning;L Min;SHI Ping-zhou;QIU Wen-bo;CHEN Gang;HOU Jiang(College of Geology and Environment,Xi an University of Science and Technology,Xi an 710054,China;Yanchang Petroleum Group Exploration Company,Yan an 716000,China;Xi'an Research Institute of China Coal Technology&Engineering Group Corp,Xi an 710054,China;School of Geoscience and Technology,Southwest Petroleum University,Chengdu 610500,China)

机构地区：[1]西安科技大学地质与环境学院,西安710054 [2]陕西延长石油(集团)油气勘探公司,延安716000 [3]中煤科工集团西安研究院有限公司,西安710054 [4]西南石油大学地球科学与技术学院,成都610500

出　　处：《科学技术与工程》2020年第26期10727-10733,共7页Science Technology and Engineering

基　　金：陕西延长石油(集团)有限责任公司科技攻关项目(ycsy2011ky-B-78)。

摘　　要：为使用地震相特征解译沉积分布规律,寻找优质储层。通过对地震剖面振幅、连续性、同相轴特征的研究分析,将白垩系下统地震相分为中弱振幅低连续性楔形充填、中弱振幅中连续性楔形充填、中振幅中高连续性楔形充填、杂乱反射充填、强振幅中高连续性席状充填、中振幅中连续性席状充填等6种反射构型,并给出相应的识别标志、平面分布范围。分析认为:中弱振幅低连续性楔形充填多发育在西部次洼周缘及南部斜坡带;中弱振幅中连续性楔形充填呈北西-南东向展布;中振幅中高连续性楔形充填由盆地边缘向内部延伸;杂乱反射充填处于紧邻断裂带下降盘一侧;强振幅中高连续性席状充填分布于凹陷湖盆中心区域;中振幅中连续性席状充填主要分布于湖盆中心区域,展布面积相对于强振幅中高连续性席状充填更大。To interpret the law of sedimentary distribution and look for high-quality reservoirs by using the characteristics of seismic facies,through the analysis of the characteristics of amplitude,continuity and in-phase axis of seismic section,the lower Cretaceous seismic facies were divided into six types:medium-weak amplitude and low continuity wedge filling,medium-weak amplitude medium-continuity wedge filling,medium-high amplitude medium-high continuity wedge filling,random reflection filling,strong amplitude,medium-high continuity sheet filling There were six reflection configurations such as continuous sheet filling in medium amplitude,and the corresponding identification marks and plane distribution range were given.Analysis show that the medium-weak amplitude and low-continuity wedge filling is mostly developed in the western subdepression periphery and the southern slope belt,the medium-weak amplitude medium-continuous wedge filling extends from the edge of the basin to the interior,and the chaotic reflection filling is located on the side of the falling plate of the fault zone,and the medium-high continuous wedge filling with strong amplitude is distributed in the center of the sag lake basin.The continuous sheet filling in the middle amplitude is mainly distributed in the central area of the lake basin,and the distribution area is larger than that in the medium and high amplitude.

关 键 词：二连盆地 白北凹陷 白垩系 地震相 

分 类 号：TE122.2[石油与天然气工程—油气勘探]