天然气地球科学 ›› 2020, Vol. 31 ›› Issue (1): 112.doi: 10.11764/j.issn.1672-1926.2019.11.011
• 天然气地质学 • 下一篇
杨威(),魏国齐,李德江,刘满仓,谢武仁,金惠,沈珏红,郝翠果,王小丹
Wei YANG(),Guo-qi WEI,De-jiang LI,Man-cang LIU,Wu-ren XIE,Hui JIN,Jue-hong SHEN,Cui-guo HAO,Xiao-dan WANG
摘要:
四川盆地志留系小河坝组砂岩认识程度较低、勘探方向不明确。应用野外露头、探井、地震和测井等资料,系统研究四川盆地小河坝组砂岩的沉积、储层、成藏等油气地质特征,评价勘探潜力和方向,得到以下4点认识:①四川盆地小河坝组砂岩以粉砂岩为主,发育2类砂体,分别为前陆盆地三角洲前缘远端砂坝砂体和夹于前三角洲泥岩中的薄层砂体,2类砂体在川东地区大面积分布;②小河坝组砂岩储层整体低孔隙度低渗透率、特致密,后期成岩作用致使储层致密化,局部发育相对较高孔层段,成藏期可能发育较好储层;③小河坝组砂岩储层、龙马溪组优质泥质烃源岩和韩家店组厚层泥页岩盖层,形成一套优质的生储盖成藏组合,川东地区的开江古隆起形成与演化有利于小河坝组砂岩的成藏和保存;④小河坝组砂岩是四川盆地天然气勘探的潜在领域,2类砂体都有一定潜力,其中远端砂坝砂体有利勘探面积约为1×104 km2。成果对提高该领域地质认识、指导天然气勘探,有重要意义。
中图分类号:
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