岩性油气藏 ›› 2021, Vol. 33 ›› Issue (5): 7080.doi: 10.12108/yxyqc.20210507
罗浩渝1, 陈军2, 章学岐1, 孟祥霞2, 赵凤全1, 吴少军1, 郭璇2
LUO Haoyu1, CHEN Jun2, ZHANG Xueqi1, MENG Xiangxia2, ZHAO Fengquan1, WU Shaojun1, GUO Xuan2
摘要: 库车坳陷南斜坡白垩系巴西改组已发现2个岩性油气藏,展现出了该地区白垩系岩性油气藏勘探的潜力。为了进一步拓展白垩系巴西改组岩性勘探领域,通过岩心观察、测井相、地震相、砂地比和古地貌等综合分析,明确巴西改组上、中、下3段的物源均来自东南方向的哈拉哈塘南部和英买力南部,沉积体系为河控浅水三角洲。巴西改组中、下段分布在哈拉哈塘东南部,发育河控浅水三角洲内前缘-浅湖亚相,上段在研究区均有分布,为退积型沉积,发育河控浅水三角洲内前缘-外前缘-浅湖亚相。研究区白垩系的构造为南高北低,在南部物源的空间匹配关系下,认为退积型河控浅水三角洲内前缘顶部的席状砂,外前缘侧翼的水下分流河道和外前缘倾末端的席状砂是岩性油气藏勘探的有利相带。巴西改组上段是岩性勘探的首选目的层,英买力南部和yd7-ym46-dh26井环带是其有利地区。该成果可为库车坳陷南斜坡白垩系巴西改组下一步岩性油藏的勘探提供依据。
中图分类号:
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