EVALUATION OF PETROLEUM POTENTIAL OF UPPER TRIASSIC SPONGE PATCH REEFS IN NORTHWESTERN SICHUAN
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摘要: 笔者对四川盆地西北部上三叠统卡尼阶汉旺组中已暴露的海绵点礁群作了详细的野外观察及室内岩石学、古生态、含油性等初步研究。国内海绵礁产气已在川东南和鄂西南有先例,国外礁产油、气的例子也不少。黄汲清先生从大区域论证四川盆地找油找气的方向时,也提到了这些点礁群。这些点礁群又位于川西北目前石油勘探的目的层内。因此,对川西北上三叠统海绵点礁群的含油性研究是十分必要的。Abstract: A sponge patch reef complex is found within the strata of Carnian Hanwang Formation.The reefs existed in the Tethysian ocean.They are not of organic skeletal reefs,but of sponge-baffled bioherms.Based on the study of geological and geochemical features of the reef complex,and physical properties of potential reservoir rock,it is proposed that the buried part of the reef group is of hydrocarbon potential,and this is a clue to search for oil and gas in northwestern Sichuan Basin.
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[1] 贝丰,川西北上三叠统马鞍塘组、小塘子组有机质的研究及生油潜能估价,石油与天然气地质,第1卷第1期,1980. -
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