Cleanup characteristics and mechanisms of reversible invert emulsion drilling fluid

Ren, Yifeng; Jiang, Guancheng; Li, Fengxia; Zhou, Hua; An, Yuxiu

doi:10.1016/j.petrol.2015.06.021

Cited by 16 publications

(3 citation statements)

References 36 publications

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“…Compared to waterbased drilling fluids, oil-based drilling fluids can provide excellent lubrication, stabilize water-sensitive clays, reduce leak-off, and form thinner filter cakes; besides, they can be applied in deep reservoirs with characteristics of high pressure and extreme temperature [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

“…To mitigate formation damage due to the water-in-oil drilling mud, it has been found that lowering pH value can invert the emulsions into the oil-in-water form, which can aid in the removal of emulsion blockage [3,5], while choosing nonionic surfactants can reduce the adsorption on rock surface and thus prevent the wettability alteration [13]. To mitigate formation damage due to the fracturing gel, it has been found that lowering pH value can also remove gel residuals and clean up such damage [32,33].…”

Section: Introductionmentioning

confidence: 99%

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Formation Damage due to Drilling and Fracturing Fluids and Its Solution for Tight Naturally Fractured Sandstone Reservoirs

Liang

Yao

et al. 2017

Geofluids

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Drilling and fracturing fluids can interact with reservoir rock and cause formation damage that impedes hydrocarbon production. Tight sandstone reservoir with well-developed natural fractures has a complex pore structure where pores and pore throats have a wide range of diameters; formation damage in such type of reservoir can be complicated and severe. Reservoir rock samples with a wide range of fracture widths are tested through a multistep coreflood platform, where formation damage caused by the drilling and/or fracturing fluid is quantitatively evaluated and systematically studied. To further mitigate this damage, an acidic treating fluid is screened and evaluated using the same coreflood platform. Experimental results indicate that the drilling fluid causes the major damage, and the chosen treating fluid can enhance rock permeability both effectively and efficiently at least at the room temperature with the overburden pressure.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Formation Damage due to Drilling and Fracturing Fluids and Its Solution for Tight Naturally Fractured Sandstone Reservoirs

Liang

Yao

et al. 2017

Geofluids

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“…For waste oil-based drilling fluid, the research in China is mainly focused on the field of oily cuttings treatment, such as thermal desorption technology, high efficient oil removal agent for oily drilling cuttings, mechanical and biological treatment, etc. [7][8][9][10]. These technologies are tested and used in YiBin, SiChuan province and SuGeli gas field [11].…”

Section: Introductionmentioning

confidence: 99%

Resource recovery and harmless treatment of waste oil-in-water drilling fluid

Tang

2017

Environmental Engineering Research

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Destablization and demulsification is a difficult task for the treatment of waste oil-in-water drilling fluid because of its "three-high" characteristics: emulsification, stabilization and oiliness. At present, China is short for effective treating technology, which restricts cleaner production in oilfield. This paper focused on technical difficulties of waste oil-in-water drilling fluid treatment in JiDong oilfield of China, adopting physical-chemical collaboration demulsification technology to deal with waste oil-in-water drilling fluid. After oil-water-solid three-phase separation, the oil recovery rate is up to 90% and the recycled oil can be reused for preparation of new drilling fluid. Meanwhile, harmless treatment of wastewater and sludge from waste oil-in-water drilling fluid after oil recycling was studied. The results showed that wastewater after treated was clean, contents of chemical oxygen demand and oil decreased from 993 mg/L and 21,800 mg/L to 89 mg/L and 3.6 mg/L respectively, which can meet the requirements of grade one of "The National Integrated Wastewater Discharge Standard" (GB8978); The pollutants in the sludge after harmless treatment are decreased below the national standard, which achieved the goal of resource recovery and harmless treatment on waste oil-in-water drilling fluid.

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Investigation of magnetite-based invert emulsion mud at high pressure high temperature

et al. 2021

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Cleanup characteristics and mechanisms of reversible invert emulsion drilling fluid

Cited by 16 publications

References 36 publications

Formation Damage due to Drilling and Fracturing Fluids and Its Solution for Tight Naturally Fractured Sandstone Reservoirs

Formation Damage due to Drilling and Fracturing Fluids and Its Solution for Tight Naturally Fractured Sandstone Reservoirs

Resource recovery and harmless treatment of waste oil-in-water drilling fluid

Investigation of magnetite-based invert emulsion mud at high pressure high temperature

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