鄂尔多斯盆地马岭地区上三叠统长7油层组油气富集规律

鄂尔多斯盆地马岭地区长7油层组具有良好的油气资源潜力,但随着油气勘探开发的深入,其勘探难度越来越大。致密砂岩型岩性油气藏的成藏富集机理是制约鄂尔多斯盆地延长组长7油层组深入勘探的核心问题。为了更好地指导油气勘探工作,从烃源岩、沉积相、储集层及构造特征等方面入手,总结了该区长7油层组油气藏分布特征和规律,并分析了油气富集成藏的主控因素。结果表明:马岭地区长7油层组主要为岩性油气藏,深湖浊积岩为主要沉积类型,油气富集主要受烃源岩、沉积相及储层等因素的控制。

Hydrocarbon enrichment of Upper Triassic Chang 7 oil reservoir set in Maling area,Ordos Basin

The Chang 7 oil reservoir set has great hydrocarbon potential inMaling area,Ordos Basin.With the development of oil and gas exploration,the exploration difficulty is increasingly growing in Chang 7 oil reservoir set.The accumulation mechanism of lithologic reservoir in tight sandstone gradually becomes the main difficulties for exploration arrangement of Chang 7 oil reservoir set of Yanchang Formation in Ordos Basin.Based on study of the characteristics of source rocks,sedimentary facies,reservoir and structure,the characteristics and rules of reservoir distribution were summarized,and the main controlling factors for hydrocarbon accumulation and enrichment were analyzed.The result shows that Chang 7 oil reservoir set is mainly lithologic reservoir,turbidite facies is the main sedimentary type,and the hydrocarbon accumulation and enrichment is mainly controlled by source rocks,sedimentary facies and reservoir.