Mineralogical and geochemical particularity of drill cuttings from oil fields on the example of objects of the Tomsk Region

Alena A. Klimova, Egor G. Yazikov, Ildar R. Shaikhiev

Research output: Contribution to journalArticle

Abstract

The relevance: of the research is in poorly studied mineralogical, elemental composition and toxicity of drill cuttings formed during the construction of wells in oil fields. The main aim: of the research is to identify the geochemical and mineralogical particularity of drill cuttings, to determine the toxicity of this type of waste using modern research methods. Methods: X-ray powder diffraction; inductively coupled plasma mass spectrometry; scanning electron microscope; bioassay. Results: Common minerals, such as quartz, albite, muscovite and calcite, were determined in the studied samples of drill cuttings that indicates a similar composition of the original host rocks. The geochemical specificity of drill cuttings expressed in increased concentration of chemical elements such as Pb, Zn, Cu, was revealed. Mainly, the elements belong to heavy metals of I, II and III hazard class. The value of the total pollution indicator shows that most samples of drill cuttings are of low pollution. However, the samples from existing sludge pits are characterized by medium pollution. The identified mineral phases are represented by oxides of iron, lead, zinc, iron sulfide, barium sulfate. Spherical particles of iron and lead were discovered. In general, drill cuttings samples have not toxic effects on test objects: Daphia magna, Scenedesmus quadricauda, Drosophila melanogaster. At the same time, samples from existing sludge pits have an effect on the test organism Daphia magna. In this way, the studied samples of drill cuttings are low-hazardous, practically non-hazardous waste, and are not potentially toxic.

Original languageEnglish
Pages (from-to)102-114
Number of pages13
JournalBulletin of the Tomsk Polytechnic University, Geo Assets Engineering
Volume331
Issue number2
DOIs
Publication statusPublished - 1 Jan 2020

Keywords

  • Bioassay
  • Drill cuttings
  • Elemental composition
  • Heavy metals
  • Oil field
  • Sludge pits
  • Well pad

ASJC Scopus subject areas

  • Materials Science (miscellaneous)
  • Fuel Technology
  • Geotechnical Engineering and Engineering Geology
  • Waste Management and Disposal
  • Economic Geology
  • Management, Monitoring, Policy and Law

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