Selective Water Shutoff Technology Study and Application of W/O Emulsions
A new emulsifier PN-1 was synthesized. The crude oil of Jinzhou oilfield could be well emulsified by PN-1. The activated crude oil forms water/oil emulsion below 80% water-cut. Coreflood experiments were conducted to demonstrate the selective placement of the activated crude oil. Water shutoff operations using this new technique were conducted in Liaohe oil field of CNPC, resulting in 167,000 ton of incremental oil a 295,000 cu m of reduced water. The activated viscous crude was a selective water plugging agent, and could be successfully bullheaded into the formation without damaging non-target oil zones.
B. Bai et al., "Selective Water Shutoff Technology Study and Application of W/O Emulsions," Proceedings of the SPE/DOE Improved Oil Recovery Symposium (2000, Tulsa, OK), Society of Petroleum Engineers (SPE), Apr 2000.
The definitive version is available at https://doi.org/10.2118/59320-MS
SPE/DOE Improved Oil Recovery Symposium (2000: Apr. 2-5, Tulsa, OK)
Geosciences and Geological and Petroleum Engineering
Article - Conference proceedings
© 2000 Society of Petroleum Engineers (SPE), All rights reserved.