济阳坳陷车西洼陷沙二、三段地层界线的厘定  

Determination of formation dividing boundary line between Es_2and Es_3 in Chexi Sag,Jiyang Depression

作　　者：梁东河[1] 王如良[1] 宋传春 

机构地区：[1]胜利石油管理局地质录井公司,山东东营257064 [2]胜利油田有限公司博士后流动站,山东东营257000

出　　处：《大庆石油地质与开发》2004年第3期23-25,共3页Petroleum Geology & Oilfield Development in Daqing

摘　　要：由于车西洼陷沙二段下部至沙三上部第一套油页岩之间的地层沉积特征变化不大,岩电均无明显标志层,横向上可对比性差,导致长期以来沙二、三段的地层划分没有统一意见,而且不断地改上、改下。富台油田沙三上油气层的首次发现,使油气控制因素成为突出问题,综合研究分析认为油气的分布与沙二、沙三段的接触关系有关,其接触关系为一区域性不整合面,其位置在高阻油页岩之上50～170m附近,而不在高阻油页岩顶部。根据古生物、岩性、测井、地震及区域地层对比等资料,分析了沙二、三段之间的接触关系、性质及分布位置,厘定了沙二、沙三段的地层界线,确定了接触关系性质及其分布位置,解决了长期以来沙二、三段地层的划分问题,确定了油层的归属。The formation sedimentary characteristics of the first set of shale between the lower part of Es_2 and the upper part of Es_3 (don’t) vary a lot. There is no apparent reference mark layer on lithological- electrical relationship,and the comparability is very poor. So there is no unique conclusion about determining the dividing line between Es_2 and Es_3 for a long time. Since the first discovery of oil and gas bearing zone in upper Es_3 in Futai Oilfield, the controlling factors of oil and gas are becoming very important. Through having comprehensive research, it is thought that the oil and gas distribution is related to the contact relationship between Es_2 and Es_3. This contact relationship is unconformity in the whole area, its position is from 50 to 170 meters above the high resistivity shale, rather than in the top of the shale. According to Palaeontology, lithological characteristics, well logging, seismic and regional formation correlation information etc., a series of problems, including contact relationship, distribution and dividing line between Es_2 and Es_3 as well as the source of oil, get to be solved.

关 键 词：车西洼陷 沙二段 沙三段 地层界线 分层依据 

分 类 号：TE121.34[石油与天然气工程—油气勘探]