雅—大凝析气藏异常产水特征及来源初探

雅克拉—大涝坝凝析气藏开发过程中，边水侵入储层前，出现一种介于边水和凝析水之间的异常产水类型：含水高，水气比高（产水量是初始凝析水含量0.084×10^-4 m³/m³的9倍左右），但化验氯根较低。根据生产动态和实验数据，总结了雅—大凝析气藏此类异常产水气井的产水特征以及异常性，初步探讨产水来源主要包括凝析水和粒间水（含束缚水），且粒间水（含束缚水）可能被高速流动的天然气或凝析油以小水珠形式携带至井筒后产出。从而正确认识此气藏的产水规律，进行合理控制。

Features and sources of abnormal water production in Yakela-Dalaoba condensate gas reservoir

During the development of the Yakela-Dalaoba condensate gas reservoir, an abnormal water production type between bottom water and condensate water appears before bottom water invading into reservoir. It is characterized by high water content, high water/ gas ratio (water content is 9 times of initial condensate water content which is 0.084×10-4 m3/m3) and low tested chlorine ion content. Based on dynamic production and experimental data, it is summarized in this paper the water production characteristics and abnormalities of gas wells of the Yakela-Dalaoba condensate gas reservoir. Condensate water and intergranular water (including bound water) are the main sources, and the intergranular water (including bound water) may be carried to wellbore in the form of small droplets by high-speed flow of natural gas or condensate oil. The correct understanding of water production law helps reasonable control.