Screening and Field Application of FPSO Fungicide in an Oilfield in Bohai
In view of the problem of comprehensive control of SRB bacteria faced by an oilfield in Bohai,9 fungicides were selected,and the long-chain alkylguanidine salt fungicide SJ-03 was preferred,and the on-site evaluation results showed that when the concentration of the additive was 30mg/L,the bactericidal rate of the long-chain alkylguanidine salt fungicide SJ-03 reached 100%,and the bactericidal and bactericidal effect of SJ-03 was better than that of other agents.Compatibility experiments showed that the addition of fungicides did not have a significant effect on the dehydration rate and dehydration volume of crude oil.The on-site application effect showed that after the impact injection of fungicide SJ-03 at a certain concentration,the content of SRB bacteria was always maintained below 6/mL during the monitoring cycle,indicating that the bactericide SJ-03 had obvious bactericidal and bacteriostatic ability of SRB bacteria in the water system,and the oil-containing OIW in the water process tank outlet,buffer tank inlet,buffer tank outlet and water injection outlet point was relatively stable overall,and there was no large-scale fluctuation,so the change of fungicide would not affect the production process of the platform.
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