Treatment of drilling fluid waste during oil and gas drilling: a review

Yang, Jie; Sun, Jinsheng; Ren, Wei; Qu, Yuanzhi

doi:10.1007/s11356-022-25114-x

Cited by 22 publications

(12 citation statements)

References 107 publications

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“…Accidental well leakage might release chemicals in the drilling fluids and later contaminate groundwater. In addition, drilling fluids were eventually discarded as waste products after several production recycles . Previous studies , have reported that the drilling wastewater has a high level of petroleum hydrocarbons.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, drilling fluids were eventually discarded as waste products after several production recycles . Previous studies , have reported that the drilling wastewater has a high level of petroleum hydrocarbons. Certain harmful substances in drilling fluids waste might enter farmland and rivers and cause severe damage to water environment. ,, …”

Section: Introductionmentioning

confidence: 99%

“…Certain harmful substances in drilling fluids waste might enter farmland and rivers and cause severe damage to water environment. 12,15,16 When it comes to groundwater safety, persistent, mobile, and toxic (PMT) substances as well as very persistent and very mobile (vPvM) substances were given priority. 17,18 These substances can persist in groundwater for a long time and transport over long distances to contaminate drinking water wells.…”

Section: ■ Introductionmentioning

confidence: 99%

“…In recent years, the advancements of horizontal drilling and hydraulic fracturing technologies have promoted the extraction of shale gas. − However, shale gas exploration raised concerns on regional water resources due to the usage of large amounts of water and synthetic chemicals for drilling and hydraulic fracturing. − As an essential part of the drilling operation, the drilling fluids contain various organic and inorganic compounds from the solid phase, liquid phase, and chemical treatment agent. ,− Due to reliable shale inhibition and excellent lubricity, oil-based drilling fluids are an essential component in shale gas exploration. , However, oil-based drilling fluids were often considered to be environmentally hazardous due to their high toxicity . Accidental well leakage might release chemicals in the drilling fluids and later contaminate groundwater.…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies , have reported that the drilling wastewater has a high level of petroleum hydrocarbons. Certain harmful substances in drilling fluids waste might enter farmland and rivers and cause severe damage to water environment. ,, …”

Section: Introductionmentioning

confidence: 99%

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Identifying Candidate Persistent, Mobile, and Toxic (PMT) and Very Persistent and Very Mobile (vPvM) Substances in Shale Gas Drilling Fluids by Combining Nontarget Analysis and Machine Learning Model

Wang,

Han,

Jin

2024

Environ. Sci. Technol. Lett.

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Shale gas extraction has raised environmental concerns on regional water resources. Horizontal drilling is a process in which drilling fluids containing complex organic and inorganic chemicals are intensively applied. Accidental spill and improper disposal of drilling fluids and related wastes might pose risks to surrounding groundwater environment. Given regional ground water quality, persistent, mobile, and toxic (PMT) and very persistent and very mobile (vPvM) substances should be of particular attention. However, recent research rarely focused on chemical compositions of drilling fluids, and the harmful PMT/ vPvM substances in drilling fluids remain unknown. In this study, we utilized a nontarget screening strategy to detect and identify the organic compounds in drilling fluids collected in southwest China. Specifically, a total number of 371 compounds were detected in drilling fluids, and the main fraction of the compounds was alicyclic compounds. Later, an original machine learning model developed by us was applied to identify the candidate PMT/vPvM substances among the detected organic compounds. Our study identified 29 candidate PMT/vPvM substances, thus providing a list of prioritized substances for early warning and risk assessment of regional groundwater contamination.

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Section: Introductionmentioning

confidence: 99%