涪陵北部长兴组礁滩相沉积模式与勘探领域  

Reef Sediment Distribution and Exploration Fields of Changxing Formation in Fuling Block,Southeast Sichuan Basin

作　　者：李宇平[1] 

机构地区：[1]中国石化勘探分公司,四川成都610041

出　　处：《西南石油大学学报（自然科学版）》2015年第4期29-34,共6页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：国家科技重大专项(2011ZX05005-003;2011ZX05013-006)

摘　　要：在前期区域沉积相研究和露头调查基础上,以四川盆地涪陵区块周边钻井层序地层纵向叠置、演变关系入手,建立地震解释模型开展骨干地震剖面解释,利用层序地层骨架地震剖面开展长兴组地震相、沉积相解释,并建立了储层发育相带模型,从而明确了该区长兴组主要勘探领域及其地震响应特征。涪陵区块长兴组发育两个沉积旋回,存在台地边缘高能礁滩相带。长兴组沉积前古地貌存在两个地形坡折,一为台地边缘向陆棚过渡坡折,一为台地内部阶地坡折。两处地形坡折控制了两排高能礁滩相带发育,是该区主要勘探领域。According to the analyses on features of regional sequence stratigraphy overlapping and evolution relationship in sedimentary facies and outcrops, studies from perpendicular surrounding wells in Fuling Area in Sichuan Basin, the seismic interpretation model is firstly built up to carry out seismic interpretation of regional great seismic profile, then by using regional great sequence stratigraphy seismic profile, interpretation on seismic facies and sedimentary facies are carried out and faciesdevelopment mode of reservoirs is built up, thus the exploration ranges of Changxing Formation and their seismic responding features are clear. There develop two sedimentary cycles in Changxing Formation as well as high energy reef-beach facies belts at the margin of platform. There existed two terrain slope laps before Changxing Formation deposited, the one lap is from platform margin to shelf transiting area, the other one is the lap located in the inner part of platform. The two laps control two rows of the development of high-energy facies belts of reef-beach, which are main targets for gas exploration.

关 键 词：长兴组 层序地层 生物礁滩 勘探领域 四川盆地 

分 类 号：TE132[石油与天然气工程—油气勘探]