摘要
通过分析黏土矿物膨胀引发的单位孔隙体积变化,建立孔隙微观结构特征参数动态模型,利用三维孔隙网络技术计算不同黏土含量及水侵时间下的相对渗透率,评价和研究储集层水敏性对相对渗透率的影响。实验证明,涩北气田疏松砂岩气藏在开采过程中,地层水的侵入会造成黏土矿物膨胀,影响流体渗流规律及特征,使相对渗透率曲线整体向右偏移,两相共渗区变小,而且地层水对储集层的影响大于清水的影响。
By analysis of pore volume change caused by clay mineral swelling, the dynamic model for characteristic parameters of pore mi- croscopic structure is developed. The relative permeability under different clay contents and water invading time is simulated using 3D pore network model for the purpose of quantitative evaluation of the influence of water sensitivity on relative permeability. The experiment indicated that in the process of development of loose sandstone gas reservoir in Sebei gas field, the invasion of formation water may cause clay mineral swelling, affecting the fluid percolation and flowing characteristics in the reservoir. The relative permeability curve will shift to the right and the seepage zone of the two-phase fluids will become smaller, and the influence of formation water on the reservoir is greater than that of clean water.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2012年第6期708-711,共4页
Xinjiang Petroleum Geology
关键词
黏土矿物
水敏性
相对渗透率
孔隙网络
微观结构特征参数
clay mineral
water sensitivity
relative permeability
pore network
microscopic structure characteristic parameter
