Microsphere Injection in Porous Media with Large Pore/Particle Size Ratio
High water cut has become a worldwide challenge for oil production.It requires extensive efforts to process and then dispose;this entails expanding water handling facilities and incurring high power con-sumption costs.Polymeric microsphere injection is a cost-effective way to deal with excessive water pro-duction from subterranean formations.This study reports a laboratory investigation on microsphere injec-tion in a large volume to identify its in-depth fluid diversion(IFD)capacity in a porous media with large pore/particle size ratio.The performance of microsphere injection was evaluated using etched glass micro-models that were made based on a pore network of a natural carbonate rock.Water flooding was conduc-ted to displace oil at reservoir temperature(95℃),followed by one pore volume of microsphere injection.Three microsphere samples with median particle size of 0.05,0.3,and 20 μm were used to investigate the impact of particle size of the microspheres on oil production.Although the microspheres were much smal-ler than the pores,additional oil production was obtained,which increased with increasing microsphere concentration and particle size.As a comparison,microsphere solutions were injected into oil-wet and wa-ter-wet micromodels after water flooding.It was observed that the oil production in oil-wet micromodel was much higher than that in water-wet model.The wettability of micromodels affected the distribution patterns of the remaining oil after water flooding and further dominated the performance of the micro-sphere injection.The study supports the applicability of microsphere injection in oil-wet heterogeneous carbonate systems.
High water-cut microsphere injection etched glass micromodel pore/particle size ratio wetta-bility heterogeneous carbonate reservoir conformance control oil recovery production
Dongqing Cao Ming Han Jinxun Wang Amar J.Alshehri
Aramco Beijing Research Center,6/F,Wangjing Kechuang Building,No.4 Wangjing East Road,Chaoyang Distr Aramco Beijing Research Center,6/F,Wangjing Kechuang Building,No.4 Wangjing East Road,Chaoyang Distr Saudi Aramco,Dhahran,31311,Saudi Arabia
国内会议
青岛
英文
1-9
2018-06-20（万方平台首次上网日期，不代表论文的发表时间）