地层条件下凝析气藏的多相渗流特性  

RELATIVE PERMEABILITY LAW OF MULTIPHASE SEEPAGE UNDER HIGH TEMPERATURE AND PRESSURE IN A GAS CONDENSATE RESERVOIR

作　　者：董平川[1] 江同文[2] 唐明龙[2] 

机构地区：[1]中国石油大学石油工程教育部重点实验室,北京102249 [2]塔里木油田公司勘探开发研究院,新疆库尔勒841000

出　　处：《岩石力学与工程学报》2008年第11期2244-2251,共8页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金资助项目(50574059;50004002);国家"十五"科技攻关项目(2004BA616A02-03-01-02)

摘　　要：在进行凝析气藏的数值模拟、试井分析以及开发动态预测的过程中,需要获取具有代表性的凝析油气、油水和气水相对渗透率曲线。深层高温高压凝析气藏在开采过程中地层流体渗流伴随着复杂的相变,因此,不能用传统的油气相渗曲线来代替实际地层条件下凝析油气相对渗透率的变化规律。在地层常规物性和流体特性分析的基础上,以实际凝析气藏的凝析油、气和地层水为实验流体,用实际凝析气藏的岩石作为多孔介质,在地层温度和压力条件下研究了多相渗流特征,得到了油气、油水和气水多相渗流的相渗曲线,表明地层条件下低孔低渗岩石的油水、油气和气水两相共渗能力较弱,而对于含裂缝或孔洞的高孔高渗岩石,油水、油气和气水两相共渗区较宽,驱替效率较高。这些成果为高温高压凝析气藏的动态模拟与预测提供重要的数据和相渗曲线。It is most important for modeling the flow state to obtain the representative relative permeability curves of condensate oil/gas, oil/water and gas/water, which are the basic curves most commonly used in numerical modeling and well testing analysis. The fluid flow accompanies the phase change during the reservoir development in a gas condensate reservoir with high temperature and high pressure. Therefore, the relative permeability of the traditional testing with analog oil and gas can not be used for replacing the relative permeability obtained under the reservoir. Based on the analysis of the physical properties of the reservoir rocks and fluid properties, the seepage law of the multiphase is researched under the reservoir temperature and pressure with the condensate oil and gas of the Tazhong oil field in Tarim basin; and the relative permeability curves of condensate oil/gas, oil/water and gas/water are obtained. The results show that the two-phase flow of the oil/water, oil/gas and gas/water will not appear in low porosity and permeability rock; and the two-phase flows of the oil/water, oil/gas and gas/water have large flowing areas and high displacement efficiencies in high porosity and permeability fractured reservoir under the reservoir temperature and pressure. These results offer a very important basic data to simulate or predict the performance of a gas condensate reservoir with high temperature and high pressure.

关 键 词：石油工程 凝析气藏 多相渗流 相对渗透率 高温高压 

分 类 号：TE112.23[石油与天然气工程—油气勘探]