岩性油气藏 ›› 2019, Vol. 31 ›› Issue (3): 19.doi: 10.12108/yxyqc.20190301
• 油气地质 • 下一篇
王桂成, 曹聪
WANG Guicheng, CAO Cong
摘要: 鄂尔多斯盆地延长组长3油层组油藏与其他油层组油藏基本相似,但发现的储量最少。应用下寺湾油田岩心、测井、录井、试油、试采等资料,探讨长3油层组储层发育特征及油气成藏的控制因素。结果表明:下寺湾油田长3油层组构造较平缓,发育近东西向的鼻状构造;属于三角洲平原亚相沉积,其微相类型有分支河道、陆上天然堤、决口扇和沼泽微相,分支河道微相是砂体最发育的相带;储层岩性以细粒长石砂岩为主,主要孔隙类型为粒间孔隙,平均孔隙度为12.4%,平均渗透率为1.28 mD,属于低孔、低渗储层;油藏主要受岩性控制,其次受构造因素影响,属于构造-岩性油藏。该研究成果对长3油层组油气勘探具有指导作用。
中图分类号:
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