埕岛地区中浅层河流相砂体输导性研究——以渤海海域埕岛地区新近系为例
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摘要
河流相砂体是埕岛地区中浅层主要的油气输导层和储集层,研究其输导性对油气勘探具有重要意义。研究认为,断层相连是中浅层河流相砂体输导油气的前提,构造背景影响着油气输导方向;河道沉积砂体输导性最好,堤岸沉积砂体次之,泛滥平原沉积的砂体最差。不同岩性中细砂岩输导性最好,中砂岩次之,粉砂岩第三;输导砂体物性下限随着埋深增加而减少;砂体连通性越好,输导性越好。根据砂体宏观连通基本类型,建立了厚砂体直接连通型、微断层连通型和薄砂体或物性较差砂体连通型三种输导模式,并提出中浅层河流相砂体输导性的评价思路。
Fluvial sand body is the main carrier bed and reservoir in middle-shallow layers of Chengdao district. The results indicate whether the channel and source fault are connected is the premise of hydrocarbon migration in Fluvial sand body and the structural background influences the direction of hydrocarbon migration. The transporting capacity of sand body in river channel is the best, embankment is the secondary, floodplain sediment is the worst, the transporting capacity of fine-grained sandstone is the best, sandstone is the secondary and the siltstone was the third. The physical properties of the lower limit of migration sand decreases with the increase of depth, the better connectivity of sand body, the better migration performance of sand body. According to the basic types of sand body macro-connection, three types of sand connection patterns are established, i.e. thick sand body direct connection, micro fault connection, and thin or poor physical property sand body connection, and the migration performance evaluation plan of sand bodies in middle-shallow layers was provided.
Fluvial sand body is the main carrier bed and reservoir in middle-shallow layers of Chengdao district. The results indicate whether the channel and source fault are connected is the premise of hydrocarbon migration in Fluvial sand body and the structural background influences the direction of hydrocarbon migration. The transporting capacity of sand body in river channel is the best, embankment is the secondary, floodplain sediment is the worst, the transporting capacity of fine-grained sandstone is the best, sandstone is the secondary and the siltstone was the third. The physical properties of the lower limit of migration sand decreases with the increase of depth, the better connectivity of sand body, the better migration performance of sand body. According to the basic types of sand body macro-connection, three types of sand connection patterns are established, i.e. thick sand body direct connection, micro fault connection, and thin or poor physical property sand body connection, and the migration performance evaluation plan of sand bodies in middle-shallow layers was provided.
引文
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[2]DREYER T,SCHEIE A,WALDERHUNG O.Minipermeterbased study of permeability trends in channel sand bodies[J].AAPG Bulletin,1990,74(4):359–374.
[3]罗明高,黄健全,唐洪.油气在储层孔喉中的微观运移机理探讨[J].沉积学报,1999,17(2):269–272.
[4]林景晔.砂岩储集层孔隙结构与油气运聚的关系[J].石油学报,2004,25(1):44–47.
[5]张卫海,刘景新,吴智平,等.辽河东部凹陷北部古近系输导体系及其对油气运移的影响[J].石油大学学报(自然科学版),2005,29(5):19–22.
[6]王建伟,宋国奇,宋书君,等.东营凹陷南斜坡古近系油气沿输导层优势侧向运移的控因分析[J].中国石油大学学报(自然科学版),2009,33(5):36–40.
[7]沈朴,张善文,林会喜,等.油气输导体系研究综述[J].油气地质与采收率,2010,17(4):4–8.
[8]赵健,罗晓容,张宝收,等.塔中地区志留系柯坪塔格组砂岩输导层量化表征及有效性评价[J].石油学报,2011,32(6):949–958.
[9]裘亦楠.储层沉积学研究工作流程[J].石油勘探与开发,1990,17(1):85–90.
[10]田景春,李琦,何建军,等.济阳坳陷馆陶组河流相砂体储集性及控制因素研究[J].矿物岩石,1999,19(4):35–39.
[11]张立强,纪友亮,尚刚.吐哈盆地中三叠统辫状河三角洲砂体储集性及控制因素[J].石油大学学报(自然科学版),2001,25(4):5–9.
[12]陈纯芳,赵澄林,李会军.板桥和歧北凹陷沙河街组深层碎屑岩储层物性特征及其影响因素[J].石油大学学报(自然科学版),2002,26(1):4–7.
[13]高岗,沈霞,韩永林.低孔低渗背景下砂体输导物性下限及其对石油运聚的影响[J].高校地质学报,2010,16(3):351–357.
[14]沈朴,刘丽芳,吴克强,等.砂体输导物性下限研究[J].科学技术与工程,2015,15(19):110–114.
[15]杨凤丽,印兴耀,吴国忱.埕岛油田河流相储层地震描述方法[J].石油学报,1999,20(4):24–28.