Useful Recycling and Safe Disposal Technology of Waste Oil Based Drilling Fluids and Its Application

Duan, Hao; Wang, Rongsha; Yue, Yong; Wu, Baichun; Liu, Guangquan; Xu, Yu

doi:10.2523/iptc-16623-ms

Cited by 2 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From the perspective of protecting the ecological environment of Bohai Bay, it is imperative to achieve zero discharge of drilling fluid and drilling cuttings involved in all offshore oil and gas drilling (GB4914, 2008). At present, the treatment methods of drilling fluid all over the world include injection, solidification treatment, mud-to-cement fluid (MTC), solid-liquid separation, distillation heat treatment and biodegradation treatment (Xing, 2004;Zhang, 2007;XueYuzhi and LiGongJean, 2008;Xu et al, 2009;Zou et al, 2011;Agwa et al, 2012;Xie et al, 2013;Xu and Dong, 2014;Mao et al, 2016;Jinzhi et al, 2017;Li et al, 2017;Lei et al, 2018;He et al, 2020). Among them, solid-liquid separation is more thorough for the pollution treatment, which is suitable for offshore waste drilling fluid treatment.…”

Section: Introductionmentioning

confidence: 99%

Construction and Application of Flocculation and Destability System of Biodrill-A Drilling Fluid in Bohai Oilfield

Ma¹,

Zhang²,

Yang³

et al. 2021

Front. Energy Res.

View full text Add to dashboard Cite

To protect the marine ecological environment of Bohai Bay, the waste drilling fluid in Bohai oilfield have to be treated. In the light of the composition characteristics of Biodrill-A drilling fluid, the compounding method of the inorganic–organic flocculants was adopted to assist the flocculation and solid–fluid separation of Biodrill-A drilling fluid. Through the orthogonal test design, the main factors impacting the flocculation effect on Biodrill-A drilling fluid were found to the concentration of inorganic flocculant CaCl2 and the flocculation pH value. The optimal flocculation treatment was further obtained through single-factor optimization. Specifically, when the inorganic flocculant CaCl2 concentration was 0.9 w/v%, the organic flocculant concentration was 0.01 w/v%, the flocculation pH was 8, and the flocculation time was 7 min. Eventually, the final dewatering rate could reach 84.02%. In the optimized compound flocculants, the inorganic flocculant CaCl2 reduced the zeta potential of clay particles by electric neutralization to decrease the repulsion among particles, and the organic one could absorb and wrap the clay particles through bridging curling and electric neutralization after flocculation destabilization. Both inorganic and organic flocculants facilitated the large flocs and particles of clay particles. The field test showed that the inorganic–organic flocculants were suitable for the on-line flocculation treatment process based on centrifugal machine. The waste drilling fluid was reduced by 82%, and the water content of the separated solid phase was as low as 25.7%.

show abstract

Section: Introductionmentioning

confidence: 99%

Construction and Application of Flocculation and Destability System of Biodrill-A Drilling Fluid in Bohai Oilfield

Ma¹,

Zhang²,

Yang³

et al. 2021

Front. Energy Res.

View full text Add to dashboard Cite

show abstract

“…OBM have similar structure, but instead of water, it is constituted by an inverted emulsion of water-in-oil [11]. Water-in-oil emulsions are commonly employed as oil drilling fluids during drilling operations, therefore preventing emulsion breakage is imperative to maintain its viability and safety [12].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Evaluation of a Comb-Like Emulsifier with High Temperature Tolerance for Oil-Based Drilling Fluid

Deng¹,

Jiang²,

He³

et al. 2017

IJCEA

View full text Add to dashboard Cite

Abstract-This paper investigated a comb-like emulsifier based on amines, fatty acid and maleic anhydride. The emulsion properties and character of the emulsifier were studied by FT-IR. Meanwhile the emulsification properties of the prepared emulsion were evaluated, in terms of separation stability, electrical stability, emulsion stability and thermal stability. Then the resistance properties of synthesized emulsifier to salinity, calcium and water were studied. The results indicated that the structure of comb-like emulsifier was confirmed by FTIR analysis. Optimization of synthesis condition investigations demonstrated that reaction temperature was fixed at 165 ℃ and reaction time was fixed at 16h. For the high-temperature resistance of comb-like emulsifier behaviors, the emulsion-breakage voltage of comb-like emulsifier achieved 821V subsequent to rolled at 220℃ for 16h, while the EZ-MUL surfactant was 353V in the same condition. Overall, the oil-based drilling fluid prepared by the synthesized emulsifier, with excellent resistance of calcium chloride and water properties, was superior to EZ-MUL surfactant as the primary emulsifier. Besides the oil-based drilling fluid, which prepared by the comb-like emulsifier, has excellent rheological and filtration properties under complex conditions. The successful combination of high temperature resistance and emulsion stability makes the comb-like emulsifier potentially applicable in deep well, ultra-deep well and unconventional hydrocarbon resources exploration.Index Terms-Comb-like emulsifier, high temperature tolerance, drilling fluid, electrical stability.

show abstract

Useful Recycling and Safe Disposal Technology of Waste Oil Based Drilling Fluids and Its Application

Cited by 2 publications

References 0 publications

Construction and Application of Flocculation and Destability System of Biodrill-A Drilling Fluid in Bohai Oilfield

Construction and Application of Flocculation and Destability System of Biodrill-A Drilling Fluid in Bohai Oilfield

Synthesis and Evaluation of a Comb-Like Emulsifier with High Temperature Tolerance for Oil-Based Drilling Fluid

Contact Info

Product

Resources

About