松辽盆地十屋断陷前积反射特征及意义  

Progradation reflection characteristics and significance in Shiwu fault depression,Songliao Basin

作　　者：刘朋波[1,2] 蒲仁海[1,2] 刘娟霞[3] 

机构地区：[1]西北大学大陆动力学国家重点实验室,陕西西安710069 [2]西北大学地质学系,陕西西安710069 [3]大港油田勘探开发研究院,天津300280

出　　处：《石油地球物理勘探》2010年第1期115-121,共7页Oil Geophysical Prospecting

摘　　要：十屋断陷深陷带火石岭组—沙河子组周围地层中发现了来自北西、正北、南东方向4套前积反射。通过精细解释每个前积体内部各朵叶的平面展布及其相互关系,并根据砂岩厚度正演模拟研究认为,除了第Ⅰ套来自陡坡的前积体可能有水下重力流成因之外,其余3套前积体均以浊积扇成因为主,单个朵叶砂岩厚度为10～15m左右,每个前积体砂体厚度可达40～50m。浊积扇砂岩夹于暗色泥岩之中,后期深陷带东侧抬升,强烈的断裂活动对深层前积体影响较弱,可能形成良好生储盖组合与岩性油气藏。Four sets of progradation reflection which came from NW,North and SE were found from the Huoshiling formation to Shahezi Formation strata in Shiwu fault depression deep belt.By carefully interpreting the distribution and their relationship of the duo leaves inside every prograding body and based on the studies of sandstone thickness forward modeling,it is believed that the first set of progradation reflection which is from steep slope is underwater gravity flow cause,the other three sets of progradation reflection are turbidite fan cause,every duo leave sandbody is about 10 to 15 meters thick and every progradation reflection sandbody is about 40 to 50 meters thick.The turbidite fan sand bodies are embedded in the dark mudstone,east side of the deep depression raised up,the dramatic faulting activities did not affect deep progradation reflection bodies too much,so the excellent source-reservoir-seal assemblage and lithology reservoirs might develop.

关 键 词：反射特征 十屋断陷 松辽盆地 砂岩厚度 岩性油气藏 生储盖组合 沙河子组 精细解释 

分 类 号：P618.130.2[天文地球—矿床学]