Effectiveness of demulsifiers for the destruction of highly mineralized water-oil emulsions of the Srednebotuobinsky oil and gas condensate field

Polytechnic Institute (branch) of the North-Eastern Federal University named after M.K. Ammosov in Mirny, 5, build 1, Tikhonova st., 678171, Mirny, Republic of Sakha (Yakutia), Russia

^* Corresponding author: ims.06@mail.ru

Abstract

One of the most serious problems of field oil treatment at the Srednebotuobinsky oil and gas condensate field is an abnormally high content of chloride salts, reaching 350 thousand mg / dm3. The high content of chloride salts significantly complicates the preparation of oil and requires other approaches both in production and in the preparation of extracted raw materials. In this paper, the influence of the drilling fluid used in the Srednebotuobinsky oil and gas condensate field together with the most popular demulsifiers and the effect of acidity on the oil dehydration process are considered. To determine the compatibility of the drilling fluid with the formation water of the field, tests were conducted at various concentrations of the drilling fluid at temperatures. Based on the results of the data obtained, the optimal concentration of Flo-Pro NT drilling fluid from M-I Drilling Fluids Co and ANCO-2000 from ANCOR Drilling Fluids was determined at reservoir temperatures and oil treatment temperatures. Under the conditions selected above, the dynamics of desalination and dehydration of oil from the Srednebotuobinsky field were determined at various dosages of demulsifiers DMO 25126 and Dissolvan 13853 and at various acidities of the medium.