The research progress in the alkali-free surfactant-polymer combination flooding technique

Zhu, Yongfa; Zhang, Yi; Jialing, Niu; Liu, Weidong; Hou, Qingfeng

doi:10.1016/s1876-3804(12)60053-6

Cited by 82 publications

(62 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally, alkali injection also generates in situ surfactants from the naphthenic acids of crude oil (Johnson 1976). However, application of alkali is not free of problems and challenges such as scaling and production of highly stable emulsions (Zhu et al 2012).…”

Section: Alkali-surfactant Floodingmentioning

confidence: 99%

Review of surfactant-assisted chemical enhanced oil recovery for carbonate reservoirs: challenges and future perspectives

et al. 2017

View full text Add to dashboard Cite

Section: Alkali-surfactant Floodingmentioning

confidence: 99%

Review of surfactant-assisted chemical enhanced oil recovery for carbonate reservoirs: challenges and future perspectives

et al. 2017

View full text Add to dashboard Cite

“…Due to the problems mentioned above, several surfactant-polymer flooding free of alkali pilot tests have been carried out in some China's oil fields, such as Shengli, Dagang and Henan (Zhu et al 2012). The key for the surfactant-polymer flooding is to find a well-performed surfactant that could reduce the interfacial tension between oil and water to ultra-low values.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of didodecylmethyl hydroxyl sulfobetaine and its evaluation for alkali-free flooding

Shi

Song²,

Ren

et al. 2014

J Petrol Explor Prod Technol

View full text Add to dashboard Cite

In this paper, didodecylmethyl hydroxyl sulfobetaine was synthesized by reaction of didodecylmethyl amine with sodium 2-hydroxy-3-chloro propanesulfate. The interfacial tensions between Dagang crude oil and solution of the surfactants, solution of surfactant-polymer mixtures were measured. The effects of surfactant concentration and aging time on the interfacial tension were investigated. It is found that the synthesized betaine surfactant could reduce the interfacial tension to ultra-low without alkali, alcohol and the other additives in the absence of or presence of polymer. The surfactant-polymer system could lower the interfacial tension to ultra-low, even was aged for more than 2 weeks. The sand-pack flooding tests indicated that, with 0.2 wt% of the betaine and with 1,500 mg/L of polymer, 16.89 % of an additional OOIP (original oil in place) was recovered from a sand pack. This result suggested that the didodecylmethyl hydroxyl sulfobetaine might be a good surfactant candidate for enhanced oil recovery.

show abstract

“…Among them, four production Wells originally used for first polymer flooding wells locate in the main streamline of polymer flooding well pattern and the water cut rises from 92.6% before the field test to 95.7%, another 12 wells originally used for water flooding wells locate in the distributary streamline of polymer flooding well pattern and the water cut of four central wells decreases from 96.5% before the field test to 90.5% and the water cut of another 8 edge wells decreases from 95.5% before the field test to 92.4% (Seen in Fig.13). A better development effect has been seen in the production wells located at distributary streamline, its average single well accumulative oil increase is 1788t more than that of production wells located at main streamline, so remaining oil distribution are the main factor influencing on the development effect after polymer flooding [25][26][27][28][29] .…”

Section: Remaining Oil Distribution After Polymer Flooding Is a Majormentioning

confidence: 99%

High Concentration Polymer Flooding Field Test With Well Infilling to Change Fluid Flowing Direction After Polymer Flooding

Gao

Jiang

Zhang

et al. 2016

Day 2 Tue, March 22, 2016

View full text Add to dashboard Cite

There are about half reserves remaining underground after polymer flooding, which are huge reserves for further tapping. So how to enhance oil recovery greatly after polymer flooding has been a major technical challenge in china or abroad. According to the data of 20 pressure coring wells after polymer flooding, the places where remaining oil locate are precisely described in this paper and on the basis of laboratory research and numerical simulation and geological study, a new method has been developed that combines well pattern restructuring for changing fluid flowing direction and high concentration polymer flooding so as to tap remaining oil which scatters highly and enriches relatively in distributary streamline after polymer flooding. Field test which used this new method has been carried out at B2D block in Daqing oilfield after polymer flooding. In order to get optimum mobility control, a reasonable formula of high concentration polymer system is optimized and the molecular weight and concentration of polymer are respectively 25 million and 2500 mg/L. Some good responses have been obtained in this field test. The injection pressure has increased by 4.3 MPa and the fluid absorption thickness ratio has increased by 26.3% and water cut drop maximum of central well has reached 16% and its incremental oil recovery is 5%. Based on this field test, it can be concluded that whether a field test after polymer flooding can get a good development effect, well pattern infilling is a premise and remaining oil distribution is a major influential factor and reasonable mobility ratio and injection-production ratio are important safeguards. High concentration polymer flooding with well infilling to change fluid flowing direction is a very effective technology to enhance oil recovery after polymer flooding. This technology has gain very good technological and economic effect, its final incremental oil recovery is 6.77% predicted by numerical simulation and its internal rate of return is 21.9%. This technology has wide application prospects and can be widely applied in blocks of Daqing oilfield after polymer flooding.

show abstract

The research progress in the alkali-free surfactant-polymer combination flooding technique

Cited by 82 publications

References 6 publications

Review of surfactant-assisted chemical enhanced oil recovery for carbonate reservoirs: challenges and future perspectives

Review of surfactant-assisted chemical enhanced oil recovery for carbonate reservoirs: challenges and future perspectives

Synthesis of didodecylmethyl hydroxyl sulfobetaine and its evaluation for alkali-free flooding

High Concentration Polymer Flooding Field Test With Well Infilling to Change Fluid Flowing Direction After Polymer Flooding

Contact Info

Product

Resources

About