顺北超深断控凝析气藏见水预警

doi:10.7657/XJPG20250413

摘要/Abstract

摘要：

随着凝析气藏的开发，地层压力不断下降，水侵使地层气水两相流中气相渗透率变小，导致气井产能大幅下降，严重时气井产水快速上升导致水淹，影响整个气田的合理开发和储量评估。针对超深断控凝析气藏在开发过程中见水预警的问题，通过实验模拟法、经验公式法和生产统计法，综合判断顺北超深断控凝析气井生产水气比应小于0.56×10^-4 m³/m³，如果生产水气比大于此值，则判断气井有可能早期见水。通过对顺北凝析气藏水样全分析报告中各离子含量的研究，将Br^-含量和I^-含量2项指标加入斯蒂夫蝶形图中，建立顺北超深断控凝析气藏典型图版来预警气井见水，为凝析气藏合理开发提供依据，经现场应用验证了该方法的可靠性。

关键词: 顺北地区, 超深层, 凝析气藏, 生产水气比, 见水预警, 水分析

Abstract:

During the development of condensate gas reservoirs, formation pressure decline leads to water invasion, which reduces gas-phase permeability in the gas-water two-phase flow system of the formation. As a result, the gas well productivity declines significantly, and in severe cases, rapid water production escalation causes water flooding, impacting the rational development and reserves estimation of the gas field. To address the early warning of water breakthrough in ultra-deep fault-controlled condensate gas reservoirs, by integrating empirical formulas, experimental simulation, and production statistics, it is determined that the produced water-gas ratio of the ultra-deep fault-controlled condensate gas wells in the Shunbei area should be less than 0.56×10?? m3/m3. Exceeding this threshold suggests a risk of premature water breakthrough. By analyzing ion contents in water samples from the condensate reservoirs in the Shunbei area, two key indicators such as Br? and I? concentrations were incorporated into the Stiff pattern diagram. A representative chart for early warning of water breakthrough in the ultra-deep fault-controlled condensate gas reservoirs in the Shunbei area was established, providing a basis for making development strategies. The field application has verified its reliability.

Key words: Shunbei area, ultra-deep straum, condensate gas reservoir, water-gas ratio, early water breakthrough warning, water analysis

中图分类号:

TE344

李柏林, 王贺. 顺北超深断控凝析气藏见水预警[J]. 新疆石油地质, 2025, 46(4): 492-497.

LI Bolin, WANG He. Early Warning of Water Breakthrough in Ultra-Deep Fault-Controlled Condensate Gas Reservoirs in Shunbei Area, Tarim Basin[J]. Xinjiang Petroleum Geology, 2025, 46(4): 492-497.

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井名	原始地层压力/ MPa	地层温度/ ℃	凝析水气比/ （10^-4 m³·m^-3）	井名	原始地层压力/ MPa	地层温度/ ℃	凝析水气比/ （10^-4 m³·m^-3）
S4-10H井	80.56	164.65	0.06~0.40	S4-7H井	91.98	167.86	0.03~0.43
顺44X井	90.40	163.09	0.03~0.39	S4-8H井	90.82	163.57	0.03~0.39
S4-5H井	90.30	164.07	0.04~0.39	顺46X井	87.98	165.43	0.04~0.40
S4-6H井	85.00	175.47	0.06~0.50	S4-12H井	88.52	166.61	0.04~0.37
S4-11H井	77.00	173.23	0.09~0.47	顺47X井	73.15	167.01	0.10~0.42
顺45X井	88.83	170.35	0.04~0.45	S4-13H井	85.33	165.41	0.05~0.41
S4-4H井	94.00	170.29	0.03~0.36	顺42X井	86.76	152.74	0.04~0.31
顺41X井	91.64	158.46	0.03~0.35	S4-3H井	83.10	164.25	0.05~0.39
S4-2H井	90.00	169.96	0.04~0.40	S4-1X井	86.13	161.38	0.04~0.37