首页|Eco-friendly calcium alginate microspheres enable enhanced profile control and oil displacement

Eco-friendly calcium alginate microspheres enable enhanced profile control and oil displacement

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
Polymer microspheres(PMs),such as polyacrylamide,have been widely applied for enhanced oil re-covery(EOR),yet with environmental concerns.Here,we report a microfluid displacement technology containing a bio-based eco-friendly material,i.e.,calcium alginate(CaAlg)microspheres for EOR.Two dominant mechanisms responsible for EOR over CaAlg fluid have been verified,including the micro-scopic oil displacement efficacy augmented by regulating capillary force(determined by the joint action of interfacial tension and wettability between different phases)and macroscopic sweep volume incre-ment through profile control and mobility ratio reduction.This comprehensive effectiveness can be further impacted when the CaAlg microsphere is embellished ulteriorly by using appropriate amount of sodium dodecyl sulfonate(SDS).The core flooding and nuclear magnetic resonance(NMR)tests demonstrate that CaAlg-SDS microsphere can balance the interphase property regulation(wettability alteration and IFT reduction)and rheology properties,enabling simultaneous profile control and oil displacement.Excessive introduction of SDS will have a negative impact on rheological properties,which is not favored for EOR.Our results show that the involvement of 4-mM SDS will provide the best behavior,with an EOR rate of 34.38％.This cost-effective and environmentally-friendly bio-microsphere-based microfluidic displacement technology is expected to achieve"green"oil recovery in future oilfield exploitation.

Calcium alginate microspheresWettabilityInterfacial tensionRheologyViscoelasticityEnhanced oil recovery(EOR)

Xiao-Han Zhang、Chang-Jing Zhou、Yuan-Xiang Xiao、Bo Hui、Yong-Gang Xie、Yu-Bin Su、Xin-Ru Li、Jie Huang、Mao-Chang Liu

展开 >

International Research Center for Renewable Energy,State Key Laboratory of Multiphase Flow in Power Engineering,Xi'an Jiaotong University,Xi'an,710049,Shaanxi,PR China

Shaanxi Key Laboratory of Advanced Stimulation Technology for Oil & Gas Reservoirs,School of Petroleum Engineering,Xi'an Shiyou University,Xi'an,710065,Shaanxi,PR China

Oil & Gas Technology Research Institute,Chongqing Oilfield Branch Company,PetroChina,Xi'an,710021,Shaanxi,PR China

Suzhou Academy of Xi'an Jiaotong University,Suzhou,215123,Jiangsu,PR China

展开 >

Open Fund of Shaanxi Key Laboratory of Advanced Stimulation Technology for Oil & Gas ReservoirsNational Natural Science Foundation of ChinaKey Research and Development Program of ShaanxiChina Fundamental Research Funds for the Central Universities

KFJJ-TZ-2020-2521040302022 KW-35

2024

10.1016/j.petsci.2023.12.013

石油科学(英文版)
中国石油大学（北京）

石油科学(英文版)

EI
影响因子：0.88
ISSN：1672-5107
年,卷(期)：2024.21(3)