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分散凝胶地面配注工艺是在原注聚试验流程基础上进行的。根据室内研究结果及现场注入情况知,体系成胶性能与聚合物性质、分子量、聚铝比和配制用水矿化度等诸多因素有关;试验区注入CDG后,中心采油井取得日增油24t和含水下降19.8个百分点的好效果。累计增油6664t,不考虑递减,阶段提高采收率6.94%;从室内研究及现场试验认识到,交联剂稀溶液成胶效果好于高铝溶液,CDG溶液充分混合也有利于提高成胶率。在实现交联时间可控制的前提下,CDG配注工艺可将聚合物、交联剂和水的混注简化为聚合物与交联剂水溶液两种物质通过管道输送充分混合注入油层,从而降低地面投入成本。
Dispersed gel ground injection process is based on the original injection test process. According to the indoor research results and field injection conditions, the gelation behavior of the system is related to the properties of the polymer, molecular weight, poly-aluminum ratio and the degree of salinity of formulated water. After the injection of CDG into the test area, A drop of 19.8 percentage points in water has a good effect. Accumulated increase of oil 6664t, without considering the decline, the stage of enhanced recovery of 6.94%; from laboratory studies and field tests to recognize that the crosslinking agent dilute solution gel better than the high-aluminum solution, CDG solution is also fully mixed to help improve the plastic rate. In the premise of controllable cross-linking time, CDG injection process can simplify the mixing of polymer, cross-linking agent and water into two layers of polymer and cross-linking agent aqueous solution, which are fully mixed and injected into the oil layer by pipeline to reduce the surface Input costs.