欢喜岭南部沙三段浊积扇沉积特征研究
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摘要
辽河坳陷西部凹陷沙三时期浊积扇非常发育,通过对研究区大量的岩心、录井、测井、地震资料分析,并结合前人的研究成果,研究区所处的地理位置、古地貌、构造特征等综合因素,认为该区发育两种类型浊积扇:湖底扇和滑塌扇。根据两种浊积扇体的沉积特征,将它们分为内扇、中扇、外扇三个亚相,其中内扇又可细分为主沟道和主沟道间微相,中扇可细分为辫状沟道、沟道间、沟道前缘三个微相。根据分析,研究区浊积扇辫状沟道和沟道前缘砂体成藏条件优越,易形成岩性或构造-岩性油气藏,对油气勘探的重要意义。
The turbidite fan developed extraordinary in period of the third member of Shahejie in West depression of Liaohe sag, basing on the analyses of a lot of core, logging, log and seismic data , and combining with the privous study done by researchers, the geographic position of the studied area, ancient landform, structural feature, and other comprehensive factors, we thought that this studied area developed two kinds of turbidite fan: sublacustrine fan and slump fan. Based on the sedimentary characteristics of the two kinds of turbidite, The can be divided into three subfacies as inner fan, middle fan and outer fan. Among these, inner fan can be further subdivided into two microfacies as chief channel; plain areas between chief channel, middle fan can be subdivided into three microfacies as braided channel, plain areas between braided channel and front edge of braided channel. The sand bodies of braided channel and front edge of braided channel of turbidite fan have superior condition of forming oil reservoir, which can form lithologic oil reservoir or structural-lithologic oil reservoir easily and these have important value for oil and gas exploration.
The turbidite fan developed extraordinary in period of the third member of Shahejie in West depression of Liaohe sag, basing on the analyses of a lot of core, logging, log and seismic data , and combining with the privous study done by researchers, the geographic position of the studied area, ancient landform, structural feature, and other comprehensive factors, we thought that this studied area developed two kinds of turbidite fan: sublacustrine fan and slump fan. Based on the sedimentary characteristics of the two kinds of turbidite, The can be divided into three subfacies as inner fan, middle fan and outer fan. Among these, inner fan can be further subdivided into two microfacies as chief channel; plain areas between chief channel, middle fan can be subdivided into three microfacies as braided channel, plain areas between braided channel and front edge of braided channel. The sand bodies of braided channel and front edge of braided channel of turbidite fan have superior condition of forming oil reservoir, which can form lithologic oil reservoir or structural-lithologic oil reservoir easily and these have important value for oil and gas exploration.
引文
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[2]李果营,钟建华,饶孟余,等.东辛地区沙三段滑塌浊积扇沉积特征及控制因素[J].特种油气藏,2002,29(5):25-28.
[3]裘怿南,薛叔浩,应凤祥.中国陆相油气储集层[M].北京:石油工业出版社,1997.
[4]吴崇筠,薛叔浩,等.中国含油气盆地沉积学[M].北京:石油工业出版社,1992.
[5]饶孟余,钟建华,王夕宾,等.东营凹陷东部沙三段滑塌浊积砂体沉积特征[J].煤田地质与勘探,2004,32(4):15-17.
[6]翟宁波,向树安.湖北省广北油田潜三段下部湖底扇沉积特征分析[J].山东地质,2002,18(5):17-40.
[7]喻国凡,宁松华,张守昌.辽河西部凹陷南部沙三段储层沉积特征[J].江汉石油学院学报,2002,24(2):12-14.
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