Biotesting of modeled drilling mud as an indicator of environmental risk

In the system of environmental monitoring, biomonitoring plays an important and independent role. The essence of the method determining the toxicants' effect consists in the specially selected organisms under standard conditions and recording different behavioral, physiological and biochemical factors. The paper studies the biological influence of modeled drilling mud components. The research results have shown the toxic effect of investigated muds. The obtained data confirm that biotesting can be applied for drilling fluids certification by the complex assessment of hazardous substances

Scanning Electron Microscopy Study of Drilling Cuttings in Tomsk Oblast Sites

The research is focused on determining mineralogical composition of drilling cuttings by scanning electron microscope as well as imaging the sample surface of high resolution that allows studying the structural characteristics of the site. In addition, a number of other techniques permit obtaining information on chemical composition of sample in near-surface layers. The study in drilling cuttings by means of scanning microscopy has revealed the presence of titanium, iron, zirconium oxides, iron sulphide, barium sulphate. The former is a mineral that concentrates rare-earth elements, presumably monocyte, as well as uranium silicate, etc. The results obtained confirm the data of previous X-ray structural analysis, i.e. the study samples consist of alumosilicate matrix. Apart from silicon and aluminium oxides, the matrix includes such elements as Na, K, Mg. Such a composition corresponds to rock-forming minerals: quartz, albite, microcline, clinochlore, muscovite, anorthoclase