论天然气藏测试生产压差确定原则

Discussion on the Principals of Test Pressure Difference Determination of Natural Gas Reservoir

在天然气藏测试过程中 ,若未全面地考虑到地层保护 ,由此产生地层损害是半可逆或者不可逆的。测试生产压差过大产生的危害包括微粒运移、地层出砂、反凝析、早期出水等。分析了在天然气藏测试过程中 ,测试生产压差不合理带来的影响 ,给出了高压天然气藏、凝析气藏与产水气藏测试期间 ,防止储层出砂、凝析液过多析出与水侵入储层的合理生产压差确定的原则。

During the process of natural gas pool testing, formation protection is not fully considered and thus formation damages appear which are semi-reversible or even irreversible. Formation damages resulted from large test pressure difference include particles migration, formation sand production, retrograde condensation and early water production, and so on. This paper presents that test pressure difference should be properly determined to avoid formation damages and gives the basic principle of reasonable pressure difference for avoiding formation sand production, large quantity of retrograde condensation and water influx during the process of natural gas pool testing.