莺山断陷北部沙河子组沉积特征展布规律研究  

Study on distribution of sedimentary characteristics of Shahezi Formation in the North of Yingshan Fault Depression

作　　者：王燕 滕琳 吕瑞雪 杜传伟 罗海宁[2] Wang Yan;Teng Lin;LüRuixue;Du Chuanwei;Luo Haining(Qilu Institute of Technology,Jinan 250200,China;Tarim Oilfield Company PetroChina,Korla 841000,China)

机构地区：[1]齐鲁理工学院,山东济南250200 [2]中国石油塔里木油田分公司,新疆库尔勒841000

出　　处：《能源与环保》2022年第11期53-57,79,共6页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：国家重点研发计划项目(2019YFC0605505);国家自然科学基金项目(41872238);山东省高等学校省级大学生创新创业训练计划项目(S202013998015);齐鲁理工学院科研计划项目(QL19K071)。

摘　　要：针对莺山断陷北部沙河子组沉积相带变化快、钻遇井较少、沉积分布规律及物源认识不清等问题,采用单井相、地震相分析等手段开展研究区沉积特征研究。结果表明,研究区发育湖泊相、辫状河三角洲相、扇三角洲相,其中扇三角洲相包括3亚相9种微相,辫状河三角洲包括2亚相6种微相,湖泊相包括2亚相4种微相。依据地震反射特征,将其地震相划分为3类:①平行、中低振幅、连续;②似平行、中低振幅、中低连续性;③杂乱反射、中低振幅、断续。结合区域构造特征,表明研究区沙河子期主要受三支物源体系控制(西北部、东北部、东南部),最终明确各个砂组沉积演化规律,每个砂层组时期沉积类型存在差异。该研究成果可为莺山断陷北部沙河子组勘探部署提供指导。In view of the problems such as rapid changes in the sedimentary facies belt of Shahezi Formation in the north of Yingshan Fault Depression,few wells encountered during drilling,and unclear understanding of the sedimentary distribution law and provenance,the sedimentary characteristics of the study area were studied by means of single well facies and seismic facies analysis.The results showed that lacustrine facies,braided river delta facies and fan delta facies were developed in the study area,of which fan delta facies included 3 subfacies and 9 microfacies,braided river delta included 2 subfacies and 6 microfacies,and lake facies included 2 subfacies and 4 microfacies.According to the characteristics of seismic reflection,its seismic facies were divided into three categories:①parallel,medium low amplitude,continuous;②quasi parallel,medium low amplitude,medium low continuity;③chaotic reflection,medium low amplitude,intermittent.Combined with the regional structural characteristics,it showed that the Shahezi period in the study area was mainly controlled by three provenance systems(northwest,northeast and southeast).Finally,the sedimentary evolution law of each sand formation was clarified,and there were differences in the sedimentary types of each sand formation period.The research results could provide guidance for the exploration and deployment of Shahezi Formation in the north of Yingshan fault depression.

关 键 词：莺山断陷 沙河子组 沉积特征 物源 地震相 

分 类 号：TE121[石油与天然气工程—油气勘探]