低压低产稠油藏高含水井复合增效配套技术现场应用分析

On site Application Analysis of Composite Efficiency Enhancement Supporting Technology for High Water Content Wells in Low-pressure, Low Yield, and Thick Oil Reservoirs

摘要

低压低产稠油藏进入高含水开发阶段后，油井普遍表现出地层能量不足、原油流动阻力大、优势水流通道发育、油水产出结构失衡和机采系统效率下降等问题，单一降黏、单一堵水或单纯调参措施难以持续改善开发效果。为提高高含水井剩余油动用程度，本文以某稠油区块12口低产高含水井现场治理为对象，围绕“动态诊断—复合降黏—选择性堵水—能量补充—机采优化—效果评价”的技术路线展开分析。现场应用表明，实施复合增效配套技术后，试验井平均日产液由18.6 t/d降至15.9 t/d，平均日产油由1.42 t/d提高至2.36 t/d，综合含水率由92.4%降至85.1%，动液面平均回升46 m，单井系统效率由18.7%提高至26.5%，阶段增油效果较为明显。研究认为，低压低产稠油高含水井治理不能仅依赖井筒措施，而应将油藏压力恢复、近井降黏解堵、深部调剖控水和举升制度优化纳入统一体系，形成适应稠油高含水后期开发的复合增效模式。

Abstract

After entering the high water cut development stage, low-pressure, low yield and thick oil reservoirs generally exhibit problems such as insufficient formation energy, high resistance to crude oil flow, development of advantageous water flow channels, imbalance of oil-water production structure, and decreased efficiency of the mechanical production system. Single measures such as viscosity reduction, water plugging or parameter adjustment are difficult to continuously improve the development effect. In order to improve the utilization of remaining oil in high water content wells, this article takes the on-site treatment of 12 low yield and high water content wells in a certain heavy oil block as the object, and analyzes the technical route of “dynamic diagnosis composite viscosity reduction selective water plugging energy supplementation machine production optimization effect evaluation”. On site applications have shown that after implementing the composite efficiency enhancement supporting technology, the average daily liquid production of the test well decreased from 18.6 t/d to 15.9 t/d, the average daily oil production increased from 1.42 t/d to 2.36 t/d, the comprehensive water content decreased from 92.4% to 85.1%, the average dynamic liquid level rose by 46 m, and the single well system efficiency increased from 18.7% to 26.5%. The stage oil increase effect is relatively obvious. Research suggests that the treatment of low pressure, low yield, heavy oil, and high water content wells should not rely solely on wellbore measures, but should incorporate reservoir pressure recovery, near wellbore viscosity reduction and plug removal, deep profile control and water lifting system optimization into a unified system, forming a composite efficiency enhancement model suitable for the later development of heavy oil with high water content.

关键词

低压低产 / 稠油藏 / 高含水井 / 复合增效 / 降黏堵水

Key words

low pressure and low yield / thick oil reservoir / high water content well / composite efficiency enhancement / reduce viscosity and block water

参考文献

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