Especially, it is found that there exists three types of relative permeability of water such as concave, convex to the water saturation ax and the reversed "S" pattern. The super-low permeability reservoir is sensitive to pressure, apparent with millipore undersaturation and water blocks. In this study, a new concept of irriducible undersaturation is brought up. And a new mode to describle the process of imbibition dynamics is used to reveal and confirm the mechanism of pinhole enveloping macropore as following: pendular ring of wetting phase gathers→it fills throat→it truncates nonwejting phase . The expression of pressure distribution and the equation of oil production are deduced under conditions of non-darcy linear seepage and non-linear seepage.

尤其發(fā)現(xiàn)水相相對滲透率曲線存在凹向最新在线观看精品国产福利片、凸向含水飽和度軸及反S形三種形式三级片视频网站进入；特低滲透儲層的壓力敏感性強，微孔隙的欠飽和及水鎖效應(yīng)顯著性爱综合，本文研究中提出欠束縛水飽和度的概念又黄又露又湿又爽的视频，引用一種描述滲吸動態(tài)即濕相液環(huán)聚集→充填喉道→截斷非濕相的演化過程的新方法，更深刻地揭示和證明了&小孔包圍大孔&機理性无码视频网站；推導出了非達西線性滲流和非線性滲流條件下的壓力分布表達式和油井產(chǎn)量方程性久久久久久久久。

enveloping ring：包絡(luò)環(huán)

enveloping algebra 包絡(luò)代數(shù) | enveloping ring 包絡(luò)環(huán) | enveloping surface 包絡(luò)面