注水指示曲线在塔河碳酸盐岩油藏深抽中的应用及认识

2014年 36卷 第s1期
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Application of water injection indicative curves in deep pumping of carbonate reservoirs in Tahe Oilfield
丁磊 张世亮 海涛 姚俊波
Ding Lei Zhang Shiliang Hai Tao Yao Junbo
中国石化 西北油田分公司 塔河采油二厂, 新疆轮台 841604
Tahe No.2 Oil Production Plant, SINOPEC Northwest Company, Luntai, Xingjiang 841604, China
塔河缝洞型碳酸盐岩油藏单井注水替油技术已成为塔河油田减缓产量递减的最为经济有效的手段.以注水指示曲线特征分析为突破口,解析不同的注水指示曲线特征所代表的物理意义.同时根据低渗储层的渗流公式推导出第2套储集体开始供液的条件,结合现有机采工艺技术条件,通过深抽把动液面抽到注水拐点压力代表的动液面以下,达到放大生产压差,让远井第2套储集体供液的目的.通过现场实践应用,取得了较好的增油效果.
The technique which injects water to replace oil in single well is an effective and economic way to slowdown production decline in the carbonate fractured-vuggy reservoirs in the Tahe Oilfield. The physical meanings of the different characteristics of water injection indicative curves were analyzed. According to the seepage formula of low-permeability reservoirs, the fluid-supplying condition of the 2nd set of reservoir was calculated. Combined with present pumping techniques, we used deep pumping to drawdown dynamic liquid level to the height which had smaller pressure than the inflecting point of water injection. In this way, production pressure difference was enlarged, which caused the liquid supplying of the 2nd set of reservoir in far wells. The technique was applied in field works and had achieved good effects.
碳酸盐岩; 注水指示曲线; 拐点压力; 深抽;
carbonate rock; water injection indicative curve; inflecting point pressure; deep pumping;
https://doi.org/10.11781/sysydz2014S1077