黑液双液法堵剂的研究

Plugging agent from soda black liquor used in double fluid method

本文对黑液在酸的作用下同时生成凝胶和泡沫进行了研究。由于凝胶的沉积作用和泡沫的Jamin效应，使其在采油工艺中能改变非均质地层中的渗透规律，起到堵水作用，是一种新型的双液法堵剂。在25℃条件下将黑液分别用2．5mol·L－1H2SO4、6mol·L－1HCl和CO2进行处理，当pH值分别达到10．16、9．60、10.08时凝胶沉淀完全。实验结果表明，凝胶的粘度为13．2～26．6mPa·s，泡沫的寿命为32～34min。当pH为13．5～13.9时可使凝胶溶解。

The gel and foam were formed by adding precipitation into black liquor. The deposition of the gel and the Jamin effect of the foam could modify the heterogeneity of the permeability of the strata. At the temperature of 25℃, the black liquor was treated with 2. 5 mol-1·L-1 of H2SO4, 6 mol·L-1 of HCl and CO2, gels could be fully precipitated when pH value reached 10.16,9. 60 and 10. 08 respectively. When pH value was more than 13. 50, the gels were broken.