Treatment and novel resource-utilization methods for shale gas oil based drill cuttings – A review

Hu, Yang; Diao, Hongli; Zhang, Yi; Xia, Shibin

doi:10.1016/j.jenvman.2022.115462

Cited by 29 publications

(10 citation statements)

References 58 publications

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“…Calculation of chemical descriptors. The stoichiometric equation is used to compute the descriptors of a given formula, including AI mod , (DBE-O)/C, DBE, and NOSC, and is shown in Equation ( 4), ( 5), (6), and (7).…”

Section: ) Analysis Of + Appi Ft-icr Msmentioning

confidence: 99%

“…[1,2] Oil-based mud is a necessary guarantee for smooth shale drilling; [3][4][5] however, with the increasing scale of shale gas exploitation, the use of oil-based mud has increased, leading to a dramatic increase in the production of secondary pollutants, OBDCs. [6,7] In addition, other conventional natural gas drilling processes also produce large amounts of OBDCs. OBDCs are classified in hazardous waste in China.…”

Section: Introductionmentioning

confidence: 99%

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Conversion Mechanism of Organic Matter While Cleaning Oil‐Based Drilling Cuttings Using Surfactant‐Free Microemulsions

Li,

Yue,

Wen

et al. 2023

ChemistrySelect

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Surfactant‐free microemulsions (SFMEs) cleaning technology can effectively separate and recover petroleum pollutants from oil‐based drilling cuttings (OBDCs). The identification of the molecular composition of OBDCs is helpful to accurately grasp the conversion mechanism of organic matter. Therefore, the understanding of the mechanism of petroleum removal at the microscopic molecular level in the cleaning process needs to be further studied. The conversion mechanism of organic matter during the use of SFMEs to clean OBDCs was investigated by positive ion atmospheric pressure photoionization Fourier transform ion cyclotron resonance mass spectrometry (+APPI FT‐ICR MS). The results show that the SFMEs cleaning technology can separate and recover CH and CHO organic matter in OBDCs, but there is still a small amount of organic matter with high molecular weight and unsaturated degree in OBDCs that has not been separated. The majority of this organic matter is CH, accounting for 91 %, and it is mainly polycyclic aromatic hydrocarbons. A total of 255 kinds of organic matter in 110# industrial white oil were detected in the recovered oil after treatment, accounting for more than 99 % of the total, which has a certain recoverable value. This study can provide a theoretical reference for the efficient degradation of OBDCs.

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Section: ) Analysis Of + Appi Ft-icr Msmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Conversion Mechanism of Organic Matter While Cleaning Oil‐Based Drilling Cuttings Using Surfactant‐Free Microemulsions

Li,

Yue,

Wen

et al. 2023

ChemistrySelect

View full text Add to dashboard Cite

show abstract

“…However, oil-based mud (OBM) is required in shale gas exploration and development. This in turn produces a large amount of oil-based cuttings (OBDCs) (the annual output of OBDCs in the Fuling shale gas region in Chongqing alone has reached 4 million tons), which contain petroleum hydrocarbons, heavy metals, and alkaline salt. Improper disposal will pose a serious threat to the ecological environment and the safety of residents. − Therefore, OBDCs have been included in China’s National Hazardous Waste List in 2021 and are strictly controlled.…”

Section: Introductionmentioning

confidence: 99%

Study on Pyrolysis of Shale Gas Oil-Based Drilling Cuttings: Kinetics, Process Parameters, and Product Yield

Liu

Xiao

Dai³

et al. 2023

ACS Omega

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The main reaction range (350–550 °C) of oil-based drilling cutting (OBDC) pyrolysis was studied by a thermogravimetric analyzer and a vacuum tube furnace. The average activation energies calculated by four model-free methods were 185.5 kJ/mol (FM), 184.16 kJ/mol (FWO), 166.17 kJ/mol (KAS), and 176.03 kJ/mol (Starink). The reaction mechanism was predicted by the Criado (Z-master plot) method. It is found that a high heating rate is helpful to predict the reaction mechanism, but it cannot be described by a single reaction model. Under the conditions of target temperature higher than 350 °C, residence time higher than 50 min, laying thickness less than 20 mm, and heating rate lower than 15 °C, the residual oil content is lower than 0.3% and the recovery rate of mineral oil is higher than 98.43%. Solid phase products accounted for more than 70%, reached the maximum 17.04% at 450 °C, and then decreased to 15.87% at 500 °C. Aromatic hydrocarbons, as coking precursors, are transformed from a low ring to a high ring. Recycled mineral oil can reconfigure oil-based mud (OBM). The research results can provide a theoretical basis for process optimization.

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“…8 However, the environmental concerns and disposal of oil-based fluids is the major limitation of using oil-based fluids. 9 Water-based drilling fluids exhibit improved performance and are extensively employed for the drilling of wellbores. 10,11 The improved performance of water-based fluids can be achieved with the incorporation of various additives such as viscosity modifiers (polymers), 12−14 shaleinhibiting agents 15 (inorganic salts, silicates, surfactants, and ionic liquids), 16−18 fluid loss modifiers (polymers and nanoparticles), 19,20 and lost circulation materials.…”

Section: Introductionmentioning

confidence: 99%

“…Oil-based fluids are considered the as most efficient due to its superior shale rheological, filtration, and inhibition properties . However, the environmental concerns and disposal of oil-based fluids is the major limitation of using oil-based fluids . Water-based drilling fluids exhibit improved performance and are extensively employed for the drilling of wellbores. , The improved performance of water-based fluids can be achieved with the incorporation of various additives such as viscosity modifiers (polymers), − shale-inhibiting agents (inorganic salts, silicates, surfactants, and ionic liquids), − fluid loss modifiers (polymers and nanoparticles), , and lost circulation materials. , The major complications in the drilling process can be faced due to the instability of the wellbore and formation damage .…”

Section: Introductionmentioning

confidence: 99%

Application of Novel Magnetic Surfactant-Based Drilling Fluids for Clay Swelling Inhibition

et al. 2023

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Water-based drilling fluids are widely employed in the oilfield industry for the efficient and smooth drilling of wellbore reservoirs. In this study, a novel drilling formulation was prepared by mixing a magnetic surfactant in the base mud formulation. Several drilling fluid tests were conducted, which include steady shear and dynamic rheology, filtration, clay sedimentation, clay swelling, and particle size distribution analysis. Different analytical techniquesXRD, FTIR, and TGA analyseswere performed to study the interactions of magnetic surfactant with the clay platelets. The experimental results of the surfactant-modified formulations were compared to the base mud formulation. Thermal gravimetric analysis of the surfactant-modified mud showed improved thermal stability compared to the base mud. FTIR analysis results of the base mud and surfactant-modified mud were compared. In the steady shear rheology experiments, the flow curves of the base mud and surfactant-modified mud showed that the addition of surfactant in the base mud affects the shear stress of formulation. The shear stress data of rheology was fitted to the Herschel–Bulkley model, and model parameters trends were assessed with and without the addition of surfactant in the base mud. Shale inhibition tests showed that the incorporation of magnetic surfactant minimized the clay hydration of swelling, thus proving a superior shale inhibitor. The particle size analysis showed that the average particle size of clay particles increased with the increasing concentration of the magnetic surfactant. The linear swelling analysis of clay showed that the rate of swelling was 90% in the surfactant-modified mud as compared to the swelling rate in deionized water. According to the zeta potential, the combination of surfactants significantly affects the electrokinetic behavior of dispersion. Further, the XRD proved that the interlayer spacing of clay increasing while interacting with magnetic surfactant molecules indicates the ability of magnetic surfactant as a shale swelling and hydration inhibitor for water-based drilling formulations.

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Treatment and novel resource-utilization methods for shale gas oil based drill cuttings – A review

Cited by 29 publications

References 58 publications

Conversion Mechanism of Organic Matter While Cleaning Oil‐Based Drilling Cuttings Using Surfactant‐Free Microemulsions

Conversion Mechanism of Organic Matter While Cleaning Oil‐Based Drilling Cuttings Using Surfactant‐Free Microemulsions

Study on Pyrolysis of Shale Gas Oil-Based Drilling Cuttings: Kinetics, Process Parameters, and Product Yield

Application of Novel Magnetic Surfactant-Based Drilling Fluids for Clay Swelling Inhibition

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