摘要
文章建立了新的降压分解模型来模拟水合物气藏的降压分解过程。新模型把水合物气藏划分为水合物区、分解区和分解完全区,研究了气、水两相流动,并考虑了整个储层温度的变化。预测结果表明,分解前缘处压力降和温度降急剧;分解区和分解完全区的温降比水合物区的温降更快;分解区内往井底方向,水合物饱和度逐渐降低、天然气饱和度是逐渐增大、水饱和度先增加后降低;水饱和度存在波峰并与水合物分解前缘同向移动。
A new blowdown decomposition model is built to simulate the blowdown decomposition process of hydrate gas reservoirs. Hydrate gas reservoir is divided into a hydrate zone, a decomposition zone and a complete decomposition zone in the new model to study the two-phase flow of gas and water and the temperature change of the whole reservoir. The followings are observed in the prediction results: Both pressure and temperature drops are abrupt in the front of the decomposition zone; the temperature drops in the decomposition zone and complete decomposition zone are more rapid than hydrate zone; hydrate saturation lowers gradually, gas saturation increases progressively, while water saturation first increases and then lowers toward the bottom hole in the decomposition zone; and water saturation shows a peak and moves forward in the same direction with the decomposition front of hydrate.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2006年第1期93-94,共2页
Natural Gas Industry
基金
中国石油天然气集团公司创新基金项目"天然气水合物相态行为及动力学研究"资助(编号:04E7047)。
关键词
水合物
气藏
压力降
两相流动
模型
多孔介质
hydrate, gas reservoir, pressure drop, two-phase flow, model, porous media
