论文部分内容阅读
过去的三年里,在阿巴科尔(Arbuckle)油田已成功地应用凝胶聚合物降低产水,进行了250多井次堵水,延长了一些井的寿命,并且增加了产量。本文对7口井的效果进行介绍,它们均使用铬醋酸盐-聚丙烯酰胺胶凝剂降低产水。施工之前录取了压力数据,以便估计油藏的渗透性。在施工期间录取井底压力数据有助于深入了解充填期间凝胶的动态。凝胶处理后录取压力恢复数据,用来判断堵水引起的油相和水相渗透率降低的幅度。分析堵水后的生产数据,以判断增油量与堵水相关的产量反应。每口井的产水量均下降,并且在7～13个月内降低值均保持稳定。增油量随着注入裸眼井的凝胶体积的增加而增加。试验结果表明,如何从那些只能进行少量凝胶堵水的井中识别出可能接纳大量凝胶的井,其结果有助于改进堵水设计和确定能够成功进行堵水的候选井。
In the past three years, gelled polymers have been successfully used in the Arbuckle field to reduce water production, shut down more than 250 wells, extend the life of some wells, and increase production. This article describes the effects of seven wells, both of which use chromium acetate-polyacrylamide gelling agents to reduce water production. Pressure data were recorded prior to construction to estimate the reservoir’s permeability. Taking bottomhole pressure data during construction helps to gain insights into the dynamics of the gel during filling. Recorded pressure recovery data after gel treatment are used to determine the magnitude of the decrease in oil and water phase permeability caused by plugging. Analyze the production data after the water blockage to determine the yield response related to plugging. The water production in each well declined, and the decrease was stable in 7-13 months. The amount of oil increases as the volume of gel injected into the openhole increases. The results of the experiments show how to identify wells that may receive large quantities of gels from wells that can only be subjected to a small amount of gel plugging, and as a result, can help to improve the plugging design and identify candidate wells for successful plugging.