摘要
针对赵凹油田安棚主体区主力油层水窜严重的开发现状，通过室内实验方法，研制了适用于其油藏条件的冻胶泡沫调驱体系，该体系主要包括耐高温起泡剂和冻胶稳泡体系，即由质量分数为0．2％～0．3％的HN-1起泡剂、0．25％～0．35％的KY-6梳形聚合物和0．6％．0．8％的YG103酚醛树脂交联剂复配而成，并优化了冻胶泡沫的注入方式、气液比和注气速度，评价了冻胶泡沫的驱油性能，形成了适用于赵凹油田油藏条件的耐高温冻胶泡沫调驱技术。评价结果表明：酚醛树脂冻胶体系作为耐高温冻胶泡沫的稳泡体系，具有较好的稳泡效果，能够大幅度提高泡沫的半衰期；与分段塞注入方式相比，气液混注方式产生的冻胶泡沫具有更好的封堵性能；冻胶泡沫的最佳气液比为1：1，气液比过高或过低均会导致冻胶泡沫的阻力系数和封堵能力下降；最佳注气速度为0．5mL／min，注气速度过高或过低均会使冻胶泡沫封堵能力下降。驱油实验结果表明，冻胶泡沫调驱体系具有良好的选择性封堵性能，剖面改善率达99％，采收率提高了44．6％。
Aiming at the development contradiction of severe water breakthrough in Anpeng area of Zhao'ao oilfield,the gel foam is selected,including the high temperature resistance foam bubbling agent and the gel foam stabilizing system which is made up of 0.2%-0.3% foaming agent,0.25%-0.35% comb polymer and 0.6%-0.8% phenolic resin crosslinker.The gel foam profile control system is developed,the injection mode,gas-liquid ratio and injection rate are optimized by the physical simulation methods and the high temperature resistance gel foam system adaptable to the high temperature reservoir of Zhao'ao oilfield is developed.The results indicated that the phenolic resin cross-linked polymer has good effect for stabilizing foam as the stabilizing system of the gel foam and could increase the half-life period substantially.Compared to the slug injection mode,the gas-liquid mixed injection mode has better plugging performance;the best gas-liquid ratio is 1∶1,and higher or lower all has an adverse effect on the plugging performance of the gel foam;the best injection rate is 0.5 mL/min,higher or lower also has the same adverse effect on the resistance coefficient and plugging performance of gel foam.The displacement experiment shows that the gel foam profile-control system has good selective plugging performance,which could increase the profile improving rate to 99%,and could increase the oil production by 44.6%.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2013年第4期57-61,115,共5页
Petroleum Geology and Recovery Efficiency
基金
长江学者和创新团队发展计划"复杂油藏开发和提高采收率的理论与技术"(IRT1294)
山东省杰出青年基金"提高采收率与采油化学"(JQ201013)
国家自然科学基金"锆冻胶分散体的制备
表征及其在多孔介质中的运移规律的研究"(51174221)
教育部新世纪优秀人才支持计划"提高采收率与采油化学"(20110226)
关键词
冻胶泡沫
注入方式
气液比
注入速度
赵凹油田
gel foam
injection mode
gas-liquid ratio
injection rate
Zhao'ao oilfield
