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.