THE EFFECTS OF COAGULANTS ON THE PHYSICAL PROPERTIES OF DRILL CUTTINGS

• Published in: Вестник Кемеровского государственного университета no. 4-3; pp. 88 - 92
• Main Authors: L. N. Skipin, D. L. Skipin, V. S. Petukhova, I. N. Kustysheva
• Format: Journal Article
• Language: English
• Published: Kemerovo State University 01.11.2015
• Subjects: filtration capacity, coagulants, ameliorants, drill cuttings, gypsum, phosphogypsum, sulphate iron, blast furnace slag, serpentine
• ISSN: 2078-8975; 2078-8983

A promising solution for the protection of the environment in the petroleum industry is to increase the work on recycling and reclamation of drill cuttings. They are characterized by alkalinity, high hydrophilicity, disturbed structure and low permeability. For the remediation of sludge in the Tyumen Region several coagulants were studied as technical rekultivators: calcium sulfate dihydrate (СaSO4∙2H2O), iron sulfate heptahydrate (FeSO4∙7H2O), serpentine (Mg3∙Si2O5(OH)4), granulated blast-furnace slag, phosphogypsum (СaSO4∙2H2O). It was established that phosphogypsum is the most promising ameliorant-coagulant. The phosphorus content in it is up to 1.5 %. The phytomeliorants’ need for phosphorus at the initial phase will be fully satisfied. Using phosphogypsum converts cuttings into an effective structure-colloidal complex with enough nutrients. Unlike natural gypsum, phosphogypsum is not subjected to cementation. Its transportation and storage does not require additional costs. The need for a coagulant can be provided by industrial enterprises of the Urals Federal District (in the town ofRevda). The use of phosphogypsum will solve three problems: 1) improving the chemical and physical properties of the cuttings; 2) direct disposal of phosphogypsum as industry waste; 3) providing the reclaimed substrate with phosphorus. This is due to phosphogypsum availability and low cost. The coefficient of correlation between the dose and the volume of the filtrate was 0.64.