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川中广安须家河气藏为孔隙-岩性型致密气藏。根据78口试采井数据分析,认为储层的孔喉构成了成藏过程中主要的疏导体系,储层物性及非均质性控制气、水的运聚和分布;构造在气藏后期改造中影响天然气的聚集,较低的构造幅度致使气、水分异差,气井普遍产水。气藏内可划分出富气区、次富气区及气、水同产区3类气水分布区,相应地提出高渗透带、单砂体及微构造控制的3种气、水分布模式。
The Xujiahe Gas Reservoir in Guang’an, Central Sichuan is a tight pore-lithologic gas reservoir. According to the data from the test of 78 wells, it is considered that the pore throats of the reservoirs constitute the main diversion system, reservoir physical property and heterogeneity controlling gas and water migration and accumulation and distribution in the process of hydrocarbon accumulation. Affecting the accumulation of natural gas, resulting in low structural amplitude, water, water, gas wells generally produce water. There are three types of gas and water distribution areas in the gas-rich area, the secondary gas-rich area and the gas-water production area. Three kinds of gas and water distribution models with high permeability zone, single sand body and micro-structure control .