论文详情
凝析气田注氮气解水锁工艺探讨
石油实验地质
2015年 37卷 第S1期
阅读：138
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Title
Eliminating water lock by nitrogen injection in condensate gas field
Authors
Yan Keju
Zeng Wei
Zhang Hui
Wu Jian
单位
中国石化西北油田分公司雅克拉采气厂, 新疆库车 842017
Organization
Yakela Gas Production Plant, SINOPEC Northwest Company, Kuqa, Xinjiang 842017, China
摘要
注氮气解水锁工艺是目前塔北地区凝析气田增产的一项创新试用措施。通过对注氮气解水锁工艺的原理进行阐述,结合工程实际中已施工4口井的概况和效果,对该工艺过程中常见的注入气量的确定、选井标准、施工压力曲线特征和何时结束施工等问题进行了分析和探讨。得出了有油气、有能量、有隔夹层、是水锁、是低孔低渗、无堵塞和无漏失的凝析气井适宜进行注氮气解水锁作业,突破阶段后泵压上升至高于地层压力可结束施工等结论。
Abstract
The technology of eliminating water lock by nitrogen injection is an innovative trial measure in the northern Tarim condensate gas fields. This paper described the principle of the technology, and discussed some problems such as nitrogen injection volume, well selection criterion, characteristics of construction pressure curve and when to end construction combined with practical engineering case and effect of 4 wells. It is concluded that condensate gas wells with more oil and gas, energy, interlayer, water lock, low porosity and low permeability, no plug and no leakage loss are suitable for eliminating water lock by nitrogen injection. We should end construction when pump pressure is higher than formation pressure.
关键词：
水锁;
注氮气量;
选井标准;
凝析气田;
塔里木盆地北部;
Keywords:
water lock;
volume of nitrogen injection;
well selection criteria;
condensate gas field;
northern Tarim Basin;
DOI
https://doi.org/10.11781/sysydz2015S1114
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