井下液面取样器研制及应用

Development and application of downhole liquid level sampler

李靖 张冬丽 樊凌云 邹伟

Li Jing Zhang Dongli Fan Lingyun Zou Wei

中国石化 西北油田分公司 完井测试管理中心, 新疆 轮台 841600

Completion and Test Management Center, SINOPEC Northwest Company, Luntai, Xinjiang 841600, China

许多油气井因地层能量不足或者在生产一段时间后，地层能量逐渐下降，油气产量逐渐减小，在油气田的勘探和开发过程中，了解井筒液面的位置及液性变化情况是判断地层产能、注氮或者酸化、压裂等改善措施的重要途径。如果所获取的地层流体样品质量不高，实验评价不正确，会使后面的工序决策失误。设计一种新型的液面浮力激发的井下液面自动取样器，能够很好地解决以上问题。

Oil and gas productions gradually decreased when formation energy became poor after a period of production in many oil and gas wells. Downhole liquid level and property change are important to judge formation energy and carry out nitrogen injection or acidification. Formation fluid samples with a poor quality and incorrect experimental evaluation will lead to subsequent decision-making mistakes. A new downhole liquid level sampler driven by buoyancy solved the above problem.

https://doi.org/10.11781/sysydz2017S1130