鄂尔多斯盆地富县西部长6浊流沉积及其地质意义  

Geological Significance and Turbidity Current Deposits in Western Fuxian County in Ordos Basin

作　　者：侯娟[1] 何文忠[2] 何廷鹏[1] 王导丽[1] 

机构地区：[1]西安石油大学油气资源学院,陕西西安710065 [2]延长石油股份有限公司杏子川采油厂勘探开发科

出　　处：《延安大学学报（自然科学版）》2011年第1期91-94,97,共5页Journal of Yan'an University：Natural Science Edition

基　　金：十一五"国家科技支撑计划(2007BAB17B05)

摘　　要：根据岩心、岩性、粒度、沉积构造及测井相等特征,长6砂体岩性主要为灰色、灰褐色细粒长石砂岩,成分成熟度、结构成熟度都较低;沉积序列以ABCE、ACE、ABE、AE、BCD、BCE不完整的鲍马序列为主,为典型的三角洲前缘滑塌型浊流沉积;长6整体上发育中扇亚相,以浊积水道、浊积水道间沉积微相为主。综合分析认为,研究区油气聚集受沉积相带的控制,呈北东向或南西向展布的浊积水道砂体为长6油层组良好的储集层,是有利的油气聚集场所;但由于不同期次的浊积岩规模的差异和浊积水道的摆动,从长63到长61亚组浊积砂体相互切割、叠置,浊积砂体表现为分布规模大,单个砂体规模小,砂体间连片性差的特征。长6浊积水道深入湖盆中心,紧邻或者直接覆盖于广覆优质长7烃源岩上,充足的烃源岩就近运移聚集于浊积水道砂体中,具备良好油气勘探前景。According to the core,litheology,granularity,construction of Sedimentary and logging facies,it indicates that the main litheology of sand body of chang 6 is grey or beige feldspar of sandstone,it is lower about composition and structure.The main deposition sequence is incomplete bouma sequence,as well as ABCE、ACE、ABE、AE、BCD、BCE,sedimentary facies types is typical slump turbidity current deposits of delta front.The unity chang 6 formaintion develops middle fan,the main deposits is the microfacies of turbidity waterway and between turbidity waterway.Comprehensive analysis,hydrocarbon accumulation of region of interest is controled by sedimentary facie,the sand body of the south west of turbidity waterway is good reservoir of chang 6 formaintion,is range of profitability of hydrocarbon accumulation;but the interval of asynchronous turbidite scale and oscillation of turbidity waterway,turbidity sand body from chang 63 to chang 63 is cutting、overriding with each other,turbidity sand body expresses big scale,but little of individual sandstone bodies,It is bad implicative between turbidity sand body.The turbidity waterway of chang 6 deeps in the heart of lake basin,and boeders or covers on high quality hydrocarbon rock of chang 7,sufficient hydrocarbon rock migrated sand body of turbidity nearlly,it is good prospects for the gas and oil exploration.

关 键 词：鲍马序列 三角洲前缘 滑塌浊积岩 浊积水道 地质意义 

分 类 号：TE121.1[石油与天然气工程—油气勘探]