辫状河三角洲-滨浅湖沉积微相及对油气分布的控制——以二连盆地阿南油田为例
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摘要
根据沉积背景和沉积环境标志的研究,发现阿南地区存在多个煤层、发育直立的植物根茎化石和泥裂构造,地震相中前积结构发育,前缘相中反韵律的分流河口砂坝发育,在半深湖泥岩中浊积岩发育,属典型的辫状河三角洲沉积体系。依据对岩石、测井和地震等微相标志的研究,在阿尔善组和腾格尔组中,划分出了9种微相,其中,滩砂和分流河口砂坝微相油气最为富集,其次为席状砂、浊积岩、水下分流河道、远砂坝和水下溢岸微相。
The sedimentary setting and environmental mark study shows that there exist multi-zone coal measures with vertical plant root fossils as well as mud-cracked structure. The seismic facies study indicates that the developed structures include prograding configuration, rhythm-inverted distributary mouth bar on braided delta front and turbidite in bathyal lake mud, belonging to typical braided delta system. Based on the study of lithofacies, log facies and seismic facies, Aershan and Tengger formations can be divided into nine microfacies. In terms of the oil abundance, from high to low, these microfacies are successively beach sand, distributary mouth bar, sand sheet, turbidite, submerged branch channel, distal bar and underwater splay sand.
The sedimentary setting and environmental mark study shows that there exist multi-zone coal measures with vertical plant root fossils as well as mud-cracked structure. The seismic facies study indicates that the developed structures include prograding configuration, rhythm-inverted distributary mouth bar on braided delta front and turbidite in bathyal lake mud, belonging to typical braided delta system. Based on the study of lithofacies, log facies and seismic facies, Aershan and Tengger formations can be divided into nine microfacies. In terms of the oil abundance, from high to low, these microfacies are successively beach sand, distributary mouth bar, sand sheet, turbidite, submerged branch channel, distal bar and underwater splay sand.
引文
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[5]聂明龙,孙柏年,刘振旺,等.焉耆盆地本布图东地区储集层特征与分布预测[J].新疆石油地质,2005,26(6):644-646.
[6]赵国良,穆龙新,计智锋,等.苏丹M盆地P油田退积型辫状三角洲沉积体系储集层综合预测[J].石油勘探与开发,2005,32(6):125-128.
[7]薛春燕,姚素平,胡文王宣,等.安塞油田延长统媒岩石学特征及沉积环境[J].新疆石油地质,2005,26(6):632-636.
[8]杨松岭,高增海,赵秀歧.塔里木盆地东河砂岩层序特征与分布规律[J].新疆石油地质,2002,23(1):35-37.
[2]GallowayWE.Silicjiegouslopeand base ofslope depositional systems:component facies,straigraphic architecture,and classification[J].AAPGBulletin,1998,82(4):569-595.
[3]薛良清,GallowayWE.扇三角洲、辫状河三角洲与三角洲体系的分类[J].地质学报,1991,65(2):141-153.
[4]裘亦楠,肖敬修,薛培华.湖盆三角洲分类的探讨[J].石油勘探与开发,1982,9(1):1-11.
[5]聂明龙,孙柏年,刘振旺,等.焉耆盆地本布图东地区储集层特征与分布预测[J].新疆石油地质,2005,26(6):644-646.
[6]赵国良,穆龙新,计智锋,等.苏丹M盆地P油田退积型辫状三角洲沉积体系储集层综合预测[J].石油勘探与开发,2005,32(6):125-128.
[7]薛春燕,姚素平,胡文王宣,等.安塞油田延长统媒岩石学特征及沉积环境[J].新疆石油地质,2005,26(6):632-636.
[8]杨松岭,高增海,赵秀歧.塔里木盆地东河砂岩层序特征与分布规律[J].新疆石油地质,2002,23(1):35-37.
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