油气藏中水膜的厚度

The thickness of water film in oil and gas reservoirs.

根据Ｇｅ等人的实验结果，归纳出气相中无离子水在强亲水性矿物表面的水膜分离压等温线，代入推广的Ｙｏｕｎｇ－Ｌａｐｌａｃｅ公式，得到实际油气藏中水膜厚度上限的计算公式。计算结果表明，油气藏中水膜的厚度比根据束缚水饱和度和岩石的比表面积计算的结果小得多，比所在毛管半径也小得多，从而对以往的计算方法以及关于水膜厚度会成为储集层中有效孔隙半径下限值的推论提出了置疑。提出了研究油气藏中水膜厚度的方法。表１参１４（邹冬平摘）

On the basis of Gee's experimental results, it is given the isotherm equation of the disjoining pressure of the water film for fresh water on the strong water wet minerals. In combination with augmented Young Laplace equation, the equation for the upper limit value of the thickness of the water film in the oil and gas reservoirs is derived. The results calculated show that conclusions based on the irreducible saturation and specific surface area of reservoir rocks could be misleading and the water films is unlikely to become the critical value of available pore radius in the reservoirs.