耦合注水在河道砂油藏中的探索与实践

Coupling water injection in channel sand reservoirs

何雪芹

He Xueqin

中国石化 西北油田分公司 采油一厂, 新疆 轮台 841600

No. 1 Oil Production Plant, SINOPEC Northwest Company, Luntai, Xinjiang 841600, China

塔河油田河道砂岩性油藏平面非均质性较强，横向分布变化较快，河道中心砂体厚、物性好，向两边减薄尖灭且物性变差。非均质性造成区块采出程度难以进一步提升，井间大量剩余油滞留，虽局部发育小规模边水，但天然能量供给不足，必须注水补充能量。常规连续注水初期有效但容易发生水窜，且水窜后有效治理手段少、治理难度大，为此进行了最优注采方式、合理注采比及合理液量、合理注水周期的研究，并在T5井区三叠系阿四段河道砂油藏进行了耦合注水的实验，效果明显。

Channel sandstone reservoirs in the Tahe oil field have strong plane heterogeneity. Sand bodies are thick and show favorable physical properties in channel center, and become worse to the sides. As a result, oil remains in wells in great quantities. Water injection for energy supply is necessary to enhance production even though small-scale edge water exists locally. Conventional continuous water injection is effective during the early stage; however, it is difficult to govern water breakthrough. Optimized injection way, injection-production ratio, water injection amount and cycle were put forward and proved effective after practicing in channel sand reservoirs in Triassic, T5 well block.

https://doi.org/10.11781/sysydz2016S1036