关键词: 蒸汽吞吐, 边水, 单层开采, 稠油, 剩余油, 挖潜

Abstract: After the XQ⁃45 block entering the multiple rounds of steam huff and puff, it is affected by edge water, faults, reservoir properties and other factors. The remaining oil distribution is complex, and steam huff and puff effect is getting worse. According to the reservoir dynamic data, the 79 wells in this block are divided into different types of heavy oil wells according to the remaining oil saturation parameters. Among them, the number of remaining oil wells affected by edge water is more than 22. As the edge water proceeds along the high⁃permeability layer to the oil well, the water content rises quickly and easily causes flooding. To further improve the effect of steam huff and puff, aim at the unutilized section in the edge water affected oil well, and take the single⁃layer steam huff and puff mode to study the optimization of steam huff and puff parameters affected by edge water. Through extract single⁃well geological model and compare different steam injection programs, the best program is selected: steam injection volume is 100 t/m, the oil steam ratio maintain at 0.2 t/t or more, obtain the maximum amount of oil production. The results show that cycle steam injection volume is 100 t/m, the oil production is the largest in the third cycle, and the sweep radius of steam reaches the maximum. After 5 rounds of steam huff and puff, cumulative steam injection volume is 3 700 t, cumulative liquid production is 4 500 t, cumulative oil production is 738.65 t, and the program implementation effect is getting better.

Key words: Steam huff and puff, Edge water, Single?layer production, Heavy oil, Remaining oil, Tapping potential