作　　者： ; ; ; ; ;

机构地区： 中国石油大学北京

出　　处： 《特种油气藏》 2010年第2期48-51,共4页

摘　　要： 伊通盆地莫里青断陷主要油藏类型为岩性油气藏,通过统计试油证实为油层的砂体的深度和储集物性分析认为,莫里青断陷古近系双阳组岩性油气藏成藏主控因素为围岩生烃条件和砂体物性条件:围岩供烃门限深度为2700m,双一段及双二段下部暗色泥岩能够大量排烃,为其中的岩性圈闭提供油气,断陷中部78%的岩性油藏在此深度之下;砂体达到聚烃门限需要孔隙度大于10%,渗透率大于0.8×10-3μm2,96%的油层物性在此门限值之上。解剖双阳组典型岩性油气藏认为,只有两主控因素均达到门限时,圈闭内才可能聚集油气成藏,当两主控因素条件较好时,可能形成含油气性较好的岩性圈闭油气藏。 Lithologic hydrocarbon reservoirs dominate the Moliqing rift in Yitong basin. Analysis of the reservoir depth and petrophysical properties statistically confirmed by oil testing has indicated that the controlling factors of lithologic hydrocarbon reservoirs in Paleogene Shuangyang formation of Moliqing rift are hydrocarbon generation condition of surrounding rock and petrophysical properties of sands. Surrounding source rock threshold is at 2 700 m,so that the dark mudstones in Shuang 1 and lower Shuang 2 members were capable of hydrocarbon expulsion at a large quantity to provide hydrocarbon for the lithologic traps,of which,78% are below this depth. The threshold of hydrocarbon accumulation required reservoir porosity over 10% and permeability over 0.8×10-3μm2,and 96% of the reservoirs are such candidates. Meticulous study of the typical lithologic reservoirs in Shuangyang formation indicates that only when both of the thresholds are satisfied can hydrocarbon accumulate in the traps; when both of the thresholds are favorable,there might formed lithologic reservoir with good oil-bearing property.

关 键 词： 门限深度 储集物性 双阳组 岩性油气藏 主控因素 伊通地堑 莫里青断陷

领　　域： [石油与天然气工程]