Early Warning of Water Breakthrough in Ultra-Deep Fault-Controlled Condensate Gas Reservoirs in Shunbei Area, Tarim Basin

doi:10.7657/XJPG20250413

Abstract

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

CLC Number:

TE344

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.

Figures/Tables 8

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Table 1.

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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