摘要
柴达木盆地南八仙油气田发育两套含油气层系深层的E31油气藏和浅层的N22—N1油气藏。7个样品的油、气高压物性实验结果揭示了凝析油气藏的相态特征和相态分布规律。浅层油气藏属于饱和烃类体系,油气藏类型包括油藏、油环凝析气藏、凝析气顶油藏和凝析气藏;深层油气藏属于未饱和烃类体系,油气藏类型包括湿气藏、凝析气藏和油藏。研究表明,由于深、浅气藏流体组分及温度、压力条件不同,烃类相态也就不同。深入了解地下流体相态特征并确定油气藏类型对于高效合理地开发油气藏、提高油、气采收率具有重要的意义。
Two oil/gas-bearing series of strata, i.e. the deep E_31 oil/gas reservoir and the shallow N_22-N_1 oil/gas reservoir, are developed in Nanbaxian oil and gas field, the Qaidam Basin. The PVT experimental data of 7 oil and gas samples reveal the phase behaviors and distribution of the condensate oil/gas reservoirs. The shallow oil/gas reservoirs contain saturated hydrocarbons and the reservoir types include oil reservoir, condensate gas reservoir with oil rim, oil reservoir with condensate gas cap and condensate gas reservoir. While the deep oil/gas reservoirs contain unsaturated hydrocarbons and the reservoir types are wet gas reservoir, condensate gas reservoir and oil reservoir. A thorough understanding of the phase behaviors of subsurface fluids and oil/gas reservoir types is of great significance not only to the highly efficient and rational development of the oil/gas reservoirs but also to the enhancement of oil recovery factor.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2006年第5期17-20,共4页
Natural Gas Industry
基金
国家重点基础研究项目"柴北缘逆冲带油气富集规律与目标选择"(编号:2004BA616A-04-07)资助。
