低渗透裂缝性油藏调剖技术及应用

Profile control technology of low-permeability fractured reservoir and its application

针对低渗透裂缝性油藏水驱含水率上升快、效率低、开采难度大的特点。利用室内物理模拟实验。研究超高分子聚合物、高分子细粉聚合物与交联剂有机铬在不同配比条件下的成胶情况，评价沸石颗粒调剖特性，优选出成胶特性及携液能力较好的液固复合型调剖体系，并在大庆肇州油田州13合作开发区州164断块北部州30-28注水井进行调剖试验，分析州30-28井周围4口生产井的生产情况．结果表明，该液固复合体系调剖剂具有优良的封堵能力，注人井吸液剖面得到明显改善，周围油井见到了较好的增油降水效果，展现出良好的应用前景；推荐调剖体系聚合物为高分子细粉聚合物。相对分子质量为1700×10^4。固体质量分数为90％，质量浓度为1000～1400mg／L；m（聚合物）：Tn（Cr^3＋）：30：1和60：1；沸石颗粒粒径为40～200目，质量分数为0．6％～4．8％．

In view of characteristic of exploitation of low-permeability fractured reservoir of difficult and low water-flood efficiency,water-cut rises sooner at the same time,this paper uses physical simulation experiment to study the plastic condition of high polymers and polymers,mixed with the gum unites organic chromium in different proportions,evaluates the zeolite profile control characteristics and optimizes gelling characteristics and the ability to carry fluid to implement the good liquid-solid composite profile control system,which has been for the pilot test in test wells located in the northern states block 164 of Daqing Oilfield State 13 Zhaozhou cooperation zones,and has analyzed production situation of the 4 effect wells around the state 30-28 wells.The results show that the liquid-solid composite profile control agent has a better profile modification.Entry profile for water injecting wells has been obviously improved,which shows a good application prospect.The recommendation of the pilot system polymer is the high and fine dust polymer,the relative molecular mass for 1 700×104,the solid quality score is 90%,the mass concentration scope is 1 000~1 400 mg/L;m(polymer): m(Cr3+)=30∶1~60∶1;The zeolite pellet,the particle size scope is 40~200 item,the quality score scope is 0.6%~4.8%.