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中亚碳酸盐岩气井选择性堵水技术
Selective water shutoff technology for carbonate gas wells in central Asia
【摘要】 针对中亚裂缝型碳酸盐岩气藏出水突进难以控制的问题,采用KB系列选择性堵剂,利用其易注入性、油水选择性、不动管柱和笼统注入等特点,结合过油管封隔工具,精准封隔出水层段,实现对产水层段的笼统处理。通过现场成功应用,目标井从停产状态转变为持续生产状态,堵水前后,在相同条件下,水产量下降84.1%,气产量下降28%,堵水率是堵气率的3倍,选择性堵剂的堵水效果明显。该方法有效控制了裂缝型碳酸盐岩气井出水,恢复了储层产能,为类似气藏的堵水作业提供了可靠的技术支持,具有很高的推广应用价值。
【Abstract】 To address the challenge of uncontrolled water breakthrough in fractured carbonate gas reservoirs in central Asia, the KB series selective plugging agent was utilized. This agent is characterized by high injectivity, oil-water selectivity, applicability without moving tubing, and bulk injection. Combined with oil-tubing packer tools, the water-producing intervals can be sealed precisely, achieving general treatment of the water-producing intervals. Field applications successfully restored shut-in wells to sustained producing ones. Before and after water shutoff treatment, under identical conditions, water production decreased by 84.1%, while gas production declined by only 28%, and the water shutoff efficiency was three times higher than gas shutoff efficiency, demonstrating that the selective plugging agent exhibited superior water shutoff performance. This approach effectively mitigates water influx in fractured carbonate gas wells and revives reservoir productivity, providing a reliable technical solution for similar reservoirs and showing strong potential for broader application.
【Key words】 carbonate gas reservoir; gas well water shutoff; selective plugging agent; water breakthrough; immovable tubing; oil-tubing packer tool;
- 【文献出处】 油气井测试 ,Well Testing , 编辑部邮箱 ,2025年03期
- 【分类号】TE37
- 【下载频次】12