Contamination of cement slurries with diesel-based drilling fluids in a shale gas well

Li, Ming; Ou, Hongjuan; Li, Zaoyuan; Gu, Tingyue; Liu, Honghua; Guo, Xiaolu

doi:10.1016/j.jngse.2015.08.010

Cited by 34 publications

(13 citation statements)

References 32 publications

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“…Li et al [29] also contradicted their previous work [28] and concluded that OBF does not hinder the hydration process of contaminated cement slurries. An increase in contamination of OBF causes an increase in lubrication and porosity of the contaminated cement slurries, thereby decreasing the strength of the hydrated samples.…”

Section: Case Studymentioning

confidence: 89%

“…An extensive study was carried out by Li et al [28] at the microscopic level to understand the mechanism of OBF contamination of oil well cement. The hydration process of contaminated cement slurries was studied using X-ray diffraction (XRD), Scanning Electron Microscope (SEM), Environmental Scanning Electron Microscope (ESEM), Thermogravimetry (TG) and Energy Dispersive Spectrometer (EDS).…”

Section: Case Studymentioning

confidence: 99%

“…It is evident that the contamination of oil well cement with OBF causes well integrity issues and there is a need to better understand the effect of this contamination. Research studies [25][26][27][28][29][30] have been carried out in recent years to evaluate and quantify the effect of OBF contamination of oil well cement on the long-term integrity of the well. A summary of these recent studies is presented in the following sections, followed by critical analyses and discussions of the same.…”

Section: Introductionmentioning

confidence: 99%

“…Hydration process for contaminated cement slurries(Li et al, 2015).Demulsification and osmotic pressure changed the rheological properties of contaminated cement slurries.Figure 9shows the process of water migration in OBF-contaminated cement slurries.…”

mentioning

confidence: 99%

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A Review of Recent Research on Contamination of Oil Well Cement with Oil-based Drilling Fluid and the Need of New and Accurate Correlations

Arbad

Teodoriu

2020

ChemEngineering

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Drilling fluids and oil well cement are important well barriers. Their compatibility affects the long-term integrity of the well. The mixing of drilling fluid with the oil well cement causes contamination of oil well cement. If the contamination is due to diesel/oil-based drilling fluid (OBF) it adversely affects the rheological and mechanical properties of oil well cement—in other words, the long-term integrity of the well. An initial study on OBF contamination of oil well cement was carried out two decades ago. In recent years, several research projects were carried out on the same topic to understand the reason for changes in the properties of oil well cement with OBF contamination. This literature review shows that using OBF eliminates several drilling problems, as the long-term integrity of the well depends on the amount of OBF contamination in the cement slurry. This paper compares the experiments performed, results and conclusions drawn from selected research studies on OBF contamination of oil well cement. Their shortcomings and a way forward are discussed in detail. A critical review of these research studies highlights the need for new and accurate correlations for OBF-contaminated oil well cement to predict the long-term integrity of wells.

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Section: Case Studymentioning

confidence: 89%

Section: Case Studymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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A Review of Recent Research on Contamination of Oil Well Cement with Oil-based Drilling Fluid and the Need of New and Accurate Correlations

Arbad

Teodoriu

2020

ChemEngineering

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“…During recent years, several methods for oily sludge treatment have been developed, such as land farming, incineration, and solidification/stabilization. Many methods are not economical or practical and are difficult to apply universally [3]. e incorporation of oily sludge in a concrete mixture can provide an alternative treatment for this hazardous waste, providing both economic and environmental benefits [4].…”

Section: Introductionmentioning

confidence: 99%

Recycling of Oily Sludge as a Roadbed Material Utilizing Phosphogypsum‐Based Cementitious Materials

Xiao

Zhang

2019

Advances in Civil Engineering

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Oily sludge is a hazardous waste containing emulsified petroleum hydrocarbons, water, heavy metals, and solid particles. The objective of this work is to employ solidification/stabilization (S/S) techniques to utilize oily sludge as a roadbed material with ordinary Portland cement (OPC), fly ash (FA), and silica fume (SF) as binders and phosphogypsum (PG) as a stabilizer. The efficacy of the S/S process is assessed mainly through an unconfined compressive strength (UCS) test and a toxicity leaching test. Road performance, including water stability, freeze-thaw resistance, and volume stability, is also tested on the solidified samples. The mineralogical compositions, microstructures, and pore structure are characterized through X-ray diffractometry (XRD), scanning electron microscopy (SEM), and mercury intrusion porosimetry (MIP). The results show that the addition of 20% binders (OPC : FA : SF = 1 : 0.7 : 0.8) in combination with phosphogypsum to the oily sludge not only increases the 28-day compressive strength of the solidified samples and remarkably decreases the release of heavy metals but also refines the pore structure and compacts the microstructure. The solidified body had sufficient strength and good water stability performance, freeze-thaw resistance, and volumetric stability. This solidification/stabilization (S/S) process, which combines oily sludge treatment and phosphogypsum resource utilization, significantly enhances environmental protection and renders the solidified product economically profitable.

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Study on Material to Improve the Contamination of Oil-Based Drilling Fluid to Cement Slurry

Dong,

Zhao,

Hou

et al. 2024

Springer Series in Geomechanics and Geoengineering

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Contamination of cement slurries with diesel-based drilling fluids in a shale gas well

Cited by 34 publications

References 32 publications

A Review of Recent Research on Contamination of Oil Well Cement with Oil-based Drilling Fluid and the Need of New and Accurate Correlations

A Review of Recent Research on Contamination of Oil Well Cement with Oil-based Drilling Fluid and the Need of New and Accurate Correlations

Recycling of Oily Sludge as a Roadbed Material Utilizing Phosphogypsum‐Based Cementitious Materials

Study on Material to Improve the Contamination of Oil-Based Drilling Fluid to Cement Slurry

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