深部液流转向剂与发展趋势

Deep Fluid Flow Diverting Agent and Its Development Trend

长期注水开发导致我国油田的非均质性问题日益加剧,极大地影响油田生产采收率的提高。针对高含水期油藏在长期水驱冲刷下存在的油藏非均质性和注入水无效、低效循环问题,而且新探明的储量大多存在于低渗透甚至超低渗透储层。因此需要一种可以长期大剂量处理地层且能够缓解地层深部的层内、层间矛盾的技术。在论述了现有的调剖技术的不足之处以及深部液流转向剂的机理的基础上,综述了针对于油田废料二次利用、转向剂地下成胶、抗剪切性能、抗压性能、海上油田转向剂应用及复合转向剂应用等问题的深部液流转向剂的种类和应用实例,并提出当前技术存在的不足之处和进一步改进的建议。

Long-term water flooding development leads to the increasing heterogeneity problem of oilfields in China,which greatly affects the improvement of oil recovery. Because the problems of reservoir heterogeneity and ineffective and inefficient circulation of injection water was prominent under long-term water flooding in high water cut reservoirs,and newly proved reserves mostly exist in low permeability or even ultra-low permeability reservoirs, a new technology that can deal with the formation for a long time need be developed to alleviate the intra-layer and inter-layer contradictions in the depth of the formation. In this paper, the shortcomings of the existing profile control technology were discussed as well as the mechanism of deep liquid flow diverter, the types and application examples of deep liquid flow diverter were summarized, and some suggestions for further improvement were put forward.