同沉积构造坡折带对岩性油气藏富集带的控制作用.PDFVIP

　　　　　　 22 2006 2　　　　 　　　　PET ROLEUM EXPLORATION AND DEVELOPMENT 　　　　　　　Vol.33　No. 1　 :1000-0747(2006)0-1 002-2 04 ——— 1 2 冯有良 , 徐秀生 (1. 中国石油勘探开发研究院;2.胜利石油管理局录井公司) :国家“十五”科技攻关课题“中国东部岩性油气藏地质评价和关键技术研究”(2003BA613A-01) :发育同沉积构 坡折带是断陷盆地的基本特征。根据对渤海湾盆地的凹陷构 发育特征与层序发育形式的研究, 同沉积构 坡折带按成因可划分为两类:同沉积断裂构 坡折带和同沉积背斜构 坡折带。前者根据其平面组合特征划 分为5 种样式:帚状断裂构 坡折带、陡坡平行(断阶)状断裂构 坡折带、缓坡平行(断阶)状断裂构 坡折带、交叉状断 裂构 坡折带和梳状断裂构 坡折带;后者据成因划分为2 种样式:同沉积披覆背斜构 坡折带、同沉积逆牵引背斜构 坡折带。盆缘沟谷与7 种构 坡折带样式的组合不但控制了层序低位域砂岩、砾岩体的发育及其展布方向, 而且控制了 优质烃源岩的发育和油气的运聚特征, 从而控制了岩性油气藏富集带的分布。 图4 参11 :构造坡折 ;盆缘沟谷;砂砾岩体;岩性油气藏富集 ;断陷盆地 :TE122.3　　　:A Syndepositional structural slope-break zone controls on lithologic reservoirs —A case from Paleogene Bohai Bay Basin 1 2 FENG ou-liang , XU Xiu-sheng (1.Research Institute of Petroleum Exp loration Development, PetroChina, Beij ing 100083, China; 2. Geological Logging Comp any of Shengli Petroleum dministration Bureau, Shandong 257000, China) Abstract:Syndepositional structural slop-e break zone is a basic characteristic of rif-t subsidence basin. According to the formation origin, syndepositinal structural slop-e break zone can be divided into syndepositional fault structural slop-e break zone and syndepositional anticline structural slop-e break zone. Five syndepositional structural slop-e break zone patterns are identified according to their fault distributions on the horizontal level, as brush , steep parallel , gently parallel, crossed , and comb-like . Two syndepositinal anticline structural slop-e break zone patterns are also identified as antithetic dragged anticline and drape anticline. The combinations of 7 syndeposit