Title:
METHOD FOR REDUCING VISCOSITY LOSS BY MEANS OF REGULATING AND CONTROLLING MICROBIAL COMMUNITY STRUCTURE COMPOSITION IN POLYMER PREPARED FROM WATER PRODUCED BY OILFIELD
Document Type and Number:
WIPO Patent Application WO/2021/254098
Kind Code:
A1
Abstract:
A method for reducing viscosity loss by means of regulating and controlling microbial community structure composition in a polymer prepared from water produced by an oilfield. An ecological viscosity loss stabilizer mother liquor is prepared by means of using (by mass fraction) 15-25% of a nitrate, 1-5% of a nitrite, 1-2% of a stabilizer, 0.1-0.5% of nutrient elements, and the balance of tap water or water produced by an oilfield for polymer preparation. By means of adding a nitrate and a nitrite, the ecological niche of denitrifying bacteria can be improved, the ecological niche of sulfate-reducing bacteria is reduced, and the community composition of microorganisms in an injection allocation system is changed, so that the number of sulfate-reducing bacteria in the injection allocation system is decreased, the viscosity loss of a polymer is reduced, and the effective viscosity of the polymer is ensured. Furthermore, the sulfate-reducing bacteria in the injection allocation system can be effectively inhibited, and no harm is caused to beneficial bacteria in an oilfield system.
Inventors:
WEI LI (CN)
ZHANG XINXIN (CN)
LI CHUNYING (CN)
WEI DONG (CN)
OUYANG JIA (CN)
PAN CHUNBO (CN)
ZHAO YUNFA (CN)
ZHANG XINXIN (CN)
LI CHUNYING (CN)
WEI DONG (CN)
OUYANG JIA (CN)
PAN CHUNBO (CN)
ZHAO YUNFA (CN)
Application Number:
PCT/CN2021/095391
Publication Date:
December 23, 2021
Filing Date:
May 24, 2021
Export Citation:
Assignee:
HUACHEN ENVIRONMENTAL PROT ENERGY GUANGZHOU CO LTD (CN)
International Classes:
C09K8/582; C09K8/588
Domestic Patent References:
| WO1994019287A1 | 1994-09-01 |
Foreign References:
| CN111662700A | 2020-09-15 | |||
| CN102153997A | 2011-08-17 | |||
| CN103764949A | 2014-04-30 | |||
| US20130160994A1 | 2013-06-27 |
Other References:
YIN ZICHAO, XU PENG;ZHANG SIYAO;WANG HAO;ZHANG XIUXIA;WANG WEIDONG: "Technology of Sulfide Control for Wastewater Treatment of Oil Field", WATER PURIFICATION TECHNOLOGY, vol. 36, no. 3, 25 March 2017 (2017-03-25), XP055881640, ISSN: 1009-0177, DOI: 10.15890/j.cnki.jsjs.2017.03.016
YIN ZICHAO: "Research on Sulfide Control of Oilfield Wastewater and the Stability of Polymer Solution", CHINESE SELECTED DOCTORAL DISSERTATIONS AND MASTER’S THESES FULL-TEXT DATABASES (DOCTORAL), ENGINEERING SCIENCE & TECHNOLOGY I, no. 7, 15 July 2019 (2019-07-15), XP055881638
YIN ZICHAO: "Research on Sulfide Control of Oilfield Wastewater and the Stability of Polymer Solution", CHINESE SELECTED DOCTORAL DISSERTATIONS AND MASTER’S THESES FULL-TEXT DATABASES (DOCTORAL), ENGINEERING SCIENCE & TECHNOLOGY I, no. 7, 15 July 2019 (2019-07-15), XP055881638
Attorney, Agent or Firm:
HARBIN HUAXIA SONGHUAJIANG INTELLECTUAL PROPERTY AGENCY CO. LTD (CN)
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