RESEARCH AND APPLICATION OF ENHANCED NITROGEN FOAM WATER CONTROL TECHNOLOGY FOR OFFSHORE SUPER HEAVY OIL THERMAL RECOVERY
In response to the impact of insufficient filling of crude oil during reservoir formation,and the N oilfield had irregularly developed high water saturation reservoirs underground,resulting in problems such as inter well gas channeling and high water content/recovery water rate during the first round of huff and puff,an enhanced foam channeling sealing and water control system for offshore thermal recovery was studied and formed.The resistance factor is 136.8 at 350℃.The enhanced foam in the parallel double pipe experiment can effectively block the low permeability pipe and use the crude oil in the high permeability pipe.After the application of this technology in Well N1 of N Oil-field,there was no steam channeling between wells during the second round of heat injection.Com-pared with the first round,the peak daily oil production of Well N1 increased by 14 m3,the water cut in the same period decreased by 7％,and the uniformity of steam absorption in the horizontal section increased by 28.7％.Strengthening the nitrogen foam can achieve efficient and balanced production of super heavy oil reservoirs.
offshore heavy oil thermal recoverysteam channelingstrengthening nitrogen foamsteam channeling control
万方数据
维普
