摘要
凝析气顶油藏气顶油环协同开发须厘清油气界面的移动规律。假设凝析气顶油藏呈椭圆锥状,利用物质平衡原理,综合考虑气顶反凝析、水蒸气含量、岩石压缩性等因素的影响,推导出计算凝析气顶油藏油气界面移动距离的新方法。应用实例表明,当气顶出现反凝析后,油气界面的移动速度开始不断增大;当忽略反凝析、岩石压缩性或水蒸气含量时,油气界面纵向移动距离的计算值均偏小,且反凝析现象对油气界面纵向移动距离的影响最大,其次为岩石压缩性,水蒸气含量影响最小;新方法得到的油气界面纵向移动距离与压力梯度法的结果吻合较好。
It is important to study the moving law of oil-gas contact in oil reservoir with condensate gas cap in the interest of developing the gas cap and oil rim concurrently. Considering factors of retrograde condensation,water vapor content and rock compressibility,a new method of calculating the moving range of oil-gas contact in the oil reservoir with condensate gas cap was derived based on material balance principle and an assumption of elliptic-cone-shaped reservoir. Application case shows that the moving velocity of oil-gas contact increases after the retrograde condensation of gas cap;all the computing results of the vertical moving range of the oil-gas contact are smaller when the factors of retrograde condensation,rock compressibility or water vapor content is neglected;the influence of retrograde condensation on the vertical moving range of the oil-gas contact is larger than that from rock compressibility and water vapor content. The computing result of the new method agrees well with the one obtained by pressure gradient method.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2015年第1期102-105,共4页
Petroleum Geology and Recovery Efficiency
基金
中国石油重大科技专项"哈萨克斯坦碳酸盐岩油气藏气顶和油环协同开发技术研究与应用"(2011E-2504)
关键词
凝析气顶油藏
油气界面移动距离
物质平衡
水蒸气含量反凝析
岩石压缩性
oil reservoir with condensate gas cap
oil-gas contact moving range
material balance
water vapor content
retrograde condensation
rock compressibility
