配套暂堵实现强凝胶堵剂的选择性堵水实验研究

针对笼统堵水作业时非目的层易被污染问题，利用产水层的高压、高能有利于流体进入低压低渗透非目的层原理，提出堵水作业前配套使用弱凝胶暂堵保护剂，从而实现高强度凝胶类堵剂笼统作业时选择性堵水的目的。同时，还简述了配套暂堵选择性堵水原理、高强度凝胶剂与弱凝胶暂堵剂性能，评价了堵剂与暂堵剂配套使用时相互性能影响以及选择性封堵性能。

A study on selective water shut-off with temporary blocking agent and strong gel in laboratory

The article aims at the problem that non-target stratum is polluted easily when doing the commingled water plugging. Using the theory that high pressure and high energy of water yield formation is propitious for fluid to flow into the non-target stratum of low pressure and permeability, the authors of this paper put forward that the temporary blocking protective agent of weak gel should be made use of before water plugging, and then strive for the realization of the goal of selective water shut-off when doing the commingled water plugging with high-strength gel agent. The article also makes exposition of the principles of temporary blocking selective water shut-off, the characteristics of high-strength gel blocking agent and weak gel temporary blocking agent, and evaluates the interrelationship of blocking agent and temporary blocking agent in property when both are used together and the functions of selective blocking.