Development and application of nanopolymer microspheres for chemical profile control and water plugging in high water bearing reservoirs
In order to effectively improve the efficiency of water injection development in high water bearing reservoirs of low permeability reservoirs and improve oil recovery,a new type of nanopolymer microsphere JHQ-1 suitable for chemical profile control and water plugging in high water bearing reservoirs to improve oil recovery was prepared by lotion polymerization using styrene St,sodium styrenesulfonate SSA,composite emulsifier FR-1,initiator AIBA and polymerization inhibitor ZJ-702 as raw materials,and its expansion performance and oil displacement effect were evaluated.The results show that JHQ-1 has strong temperature and salt resistance.When the salinity of saline water reaches 10×104mg·L-1,the expansion ratio can still reach 37.2 times after aging at 90℃ for 16 hours.JHQ-1 has a good oil recovery effect.When the mass concentration of JHQ-1 injected is 3000mg·L-1 and the injection amount is 0.5PV,the recovery rate of the core can increase by more than 20％.The new nano-polymer microsphere JHQ-1 has achieved good on-site application results in the profile control and water plugging construction of target high water bearing oil fields.The daily oil production of three oil wells has significantly increased after measures,while the water content has significantly decreased,indicating good construction effects.
low permeability reservoirshigh water bearing reservoirnanopolymer microsphereschemical pro-file control and water pluggingimprove oil recovery rate
万方数据
维普
