镰刀湾探区延长组长6油层组沉积体系特征分析  

ANALYSIS ON DEPOSITIONAL MICROFACIES OF CHANG 6 OF YANCHANG FORMATION IN LIANDAOWAN EXPLORATION AREA

作　　者：胡友洲[1,2] 李文厚[1] 李克永[1] 李宏伟[3] 

机构地区：[1]西北大学地质学系,陕西西安710069 [2]长庆油田分公司第一采油厂,陕西延安716000 [3]玉门油田分公司老君庙油田作业区,甘肃玉门735200

出　　处：《陕西科技大学学报（自然科学版）》2011年第2期146-149,共4页Journal of Shaanxi University of Science & Technology

基　　金：国家重点基础研究发展计划(973计划)项目(2003CB214602);长江学者和创新团队发展计划(IRT0559)

摘　　要：通过对镰刀湾探区近200口井的岩心观察及对镰2井、镰18井、化103井等的重点分析,结合野外露头、测井分析、砂体变化等资料,对镰刀湾探区延长组长6油层组沉积微相进行了研究.镰刀湾探区三叠系延长组长6油层组主要发育三角洲沉积体系,并以三角洲前缘沉积为主,研究区北部发育三角洲平原.研究区以三角洲前缘沉积为主,并进一步细分为水下分流河道、水下天然堤、河口坝及分流间湾等;三角洲平原沉积可细分为分流河道、决口扇、河漫滩等微相.Coreing from many wells in the region of interest in Liandaowan exploration area have been observed,data from Lian 2 Well,Lian 18 Well,Hua 103 Well and data from logging.Detail study on depositional microfacies of chang 6 of Yanchang formation in Liandaowan exploration area.In Liandaowan exploration area,delta depositional system was mainly developed,especially delta front,in Chang 6 oil-bearing formation triassic.In the north part of the region of interest,delta plain had an advantage.In the region of interest,delta front deposit was in the main place,and could be further classified into subaqueous distributary channel,subaqueous natural levee,mouth bar and interdistributory bay.Delta plain deposit could be further classified into distributary channel,crevasse splay,alluvial flat and so on.

关 键 词：镰刀湾探区 延长组 沉积微相 三角洲前缘 

分 类 号：TE122[石油与天然气工程—油气勘探]