Effect of Viscosity of Alkaline/Surfactant/Polymer (ASP) Solution on Enhanced Oil Recovery in Heterogeneous Reservoirs

Hou, J.; Zhang, S.; Dong, M.; Yue, X.; Yang, J.

doi:10.2118/2004-147

Cited by 8 publications

(9 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Experiment in Daqing showed that viscosity was largely reduced by addition of alkali [60]. Alkali can reduce polymer viscosity seriously, depending on polymer concentration, molecular weight, and alkali type [60]. NaOH could reduce polymer viscosity by 41% (polymer concentration 1800 ppm) [60].…”

Section: Alkali and Corrosionmentioning

confidence: 99%

“…The surfactants is using in 80 ∘ C reservoir ASP flooding field tests in Henan oilfield. Experiment in Daqing showed that viscosity was largely reduced by addition of alkali [60]. Alkali can reduce polymer viscosity seriously, depending on polymer concentration, molecular weight, and alkali type [60].…”

Section: Alkali and Corrosionmentioning

confidence: 99%

“…Alkali can reduce polymer viscosity seriously, depending on polymer concentration, molecular weight, and alkali type [60]. NaOH could reduce polymer viscosity by 41% (polymer concentration 1800 ppm) [60]. The higher alkali concentration, the lower ASP viscosity.…”

Section: Alkali and Corrosionmentioning

confidence: 99%

“…The viscosity and viscoelasticity of high alkaline system are vulnerable. Later, Hou et al [60] found that there existed a minimum viscosity value of ASP solution for ultralow IFT systems to fully work towards improving residual oil recovery. This minimum viscosity is defined as critical displacement viscosity.…”

Section: Alkali and Corrosionmentioning

confidence: 99%

See 3 more Smart Citations

ASP Flooding: Theory and Practice Progress in China

Guo

Wang

et al. 2017

Journal of Chemistry

View full text Add to dashboard Cite

In low oil price era, it seems that ASP flooding has little market. However, ASP progress in China shows that ASP flooding is good technology to help oil companies thrive and make profit. Since 2014, ASP flooding has entered industrial application in Daqing oilfield. ASP flooding production in 2015 is 3.5 million ton, 9% of the oilfield’s total production of Daqing oilfield. There are 22 ASP flooding blocks in Daqing, containing 7231 wells and 3 are new blocks in 2016. Obviously, more and more ASP flooding is being carried out. Another large ASP flooding field test in high temperature (80°C) in Henan oilfield has got staged incremental oil recovery of 7.7%. Latest theory and application in ASP flooding in China are reviewed to help ASP flooding go from success to more application. Weak alkali is better than strong alkali ASP flooding. Relation between viscosity and IFT is discussed. This paper also explains why weak alkali ASP flooding is promoted in Daqing after 12 field tests on strong alkali one. ASP flooding can be a great help to survive low oil price.

show abstract

Section: Alkali and Corrosionmentioning

confidence: 99%

Section: Alkali and Corrosionmentioning

confidence: 99%

Section: Alkali and Corrosionmentioning

confidence: 99%

Section: Alkali and Corrosionmentioning

confidence: 99%

See 2 more Smart Citations

ASP Flooding: Theory and Practice Progress in China

Guo

Wang

et al. 2017

Journal of Chemistry

View full text Add to dashboard Cite

show abstract

“…Compared with the earlier pilot tests, the industrial test scale in Daqing Oilfield is much larger, which includes generally dozens of injection wells (or injectors) and production wells (or producers), while a pilot test mostly contains 4 injection wells and 9 production wells. e screening of ASP flooding involves multiple factors [23,24,26,47,49], especially the geochemical properties of the reservoir [50][51][52][53][54][55], properties of crude oil [56][57][58][59], properties of the formation water and the inject water [60][61][62][63], and the interaction between ASP system and the stratum minerals as well as oil-water [25,51,53,60,61,[64][65][66][67][68][69][70][71]. To make it easier for readers to understand the differences between the two field tests and to make it convenient to provide a reference for the implementation of ASP flooding in other potential reservoirs, we compared the geology and reservoir properties of the two field tests in detail in this paper.…”

Section: Comparison Of Test Blocksmentioning

confidence: 99%

Alkali Effect on Alkali-Surfactant-Polymer (ASP) Flooding Enhanced Oil Recovery Performance: Two Large-Scale Field Tests’ Evidence

Sun

Guo

et al. 2020

Journal of Chemistry

View full text Add to dashboard Cite

Alkali-surfactant-polymer (ASP) flooding is very promising chemical enhanced oil recovery (EOR) technology which can make an incremental oil recovery factor (IORF) of 30% original oil in place (OOIP). How to choose alkali in ASP flooding remains a question for a long time. As the world’s only and largest ASP flooding application place, Daqing Oilfield has always adhered to the strategy of parallel development of strong alkali ASP flooding (SASP) and weak alkali ASP flooding (WASP), but SASP is in a dominant position, indicated by more investments and more project numbers. This leaves an impression that SASP is better than WASP. However, WASP is drawing more interest than SASP recently. Moreover, as the ASP flooding in Daqing went from field tests to commercial applications since 2014, how to comprehensively consider the benefit and cost of ASP flooding has become a new focus at low oil prices. This paper compares two typical large-scale field tests (B-1-D SASP and B-2-X WASP) completed in Daqing Oilfield and analyzes and discusses the causes of this difference. The injection viscosity and interfacial tension (IFT) for the two field test areas are substantially equivalent under the conditions of Daqing Oilfield, and WASP is better than SASP when reservoir geological conditions are considered. WASP exhibits the same IORF of 30% as SASP while having a much better economic performance. For the SASP field test, the injected strong alkali NaOH makes the test behave unlike a typical strong ASP flooding due to the presence of CO2 in the formation fluid, which well explains why IORF is much higher than all the other SASPs but scaling is less severe than others. This paper confirms that under Daqing Oilfield reservoir conditions, it is the alkali difference that caused the performance difference of these two tests, although some minor uncertainties exist. WASP is better than the SASP providing the same conditions . In addition, the detailed information of the two ASP field tests provided can give reference for the implementation of ASP flooding in other oilfields. After all, the study of ASP flooding enhanced oil recovery technology under low oil prices requires great foresight and determination.

show abstract