GYPSUM DEPOSITS UNDER OIL AND GAS PRODUCTION AT VERKHNECHONSKOE OIL/GAS CONDENSATE FIELD
The article presents the factual data on gypsum deposits in oil producing wells at Verkhnechonskoe oil and gas condensate deposit. The places of gypsum deposits in the downhole pumping equipment are located. The studies devoted to the selection of gypsum solvent that have been conducted in the chemical analytical laboratory of the oil field are described. The article provides a stage-by stage description of the technology of treating wells with caustic soda solution for salt removal. Having analyzed possible causes of gypsum deposits the authors reveal the main reason for gypsum deposition and prove it by modeling. They specify the wells at Verkhnechonskoe oil and gas condensate deposit that are located in the risk zone of gypsum deposit.