摘要
元坝气田位于超深层负向构造弱变形区,断层不发育。在分析研究区输导要素和输导特征的基础上,建立输导体系模型,分析油气输导过程,并研究输导体系对油气成藏的控制作用。元坝气田输导体系主要为长兴组白云岩孔隙型储集体与裂缝(层间缝、节理缝等)构成的网状复合输导体系,具有立体输导、近源聚集的优势,从而使由下伏吴家坪组烃源岩和侧向的大隆组烃源岩生成的油气有效实现上、下供烃和侧向供烃。长兴组礁滩相白云岩优质储层的发育与分布决定了油气侧向运移的方向和油气藏的分布及规模;裂缝的发育程度控制油气富集的层位。
Yuanba gas field lies in the weak deformation area with super-deep negative structure. The major carrier system is a 3D network complex that consists of porous-type dolomite reservoirs in Changxing formation and fractures(interbedded fracture, joint fissures and so on), which is different from that in Puguang gas field. The multidirectional migration and near-source hydrocarbon accumulation are the favorable conditons of the carrier system. It can help the gas generated from the underlying Wujiaping Formation and lateral Dalong Formation to realize vertical and lateral hydrocarbon migration. The oil and gas accumulation zones are mainly controlled by the height and density of fractures and the distribution ranges and scales of high quality dolomite reservoirs that are characteristic of reef and shoal facies in the Changxing Formation.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2014年第5期40-44,113,共5页
Petroleum Geology and Recovery Efficiency
基金
国家科技重大专项"海相碳酸盐岩层系大中型油气田分布规律与勘探评价"(2011ZX05005)
关键词
输导体系
岩性气藏
礁滩相
长兴组
元坝气田
carrier system
lithologic gas reservoirs
reef and shoal facies
Changxing Formation
Yuanba gas field
