Aiming at the treatment of large volume oil produced wastewater, combined technology based on constructed wetland was applied for water in a costal field. During stable operation period, system maintained removal efficiency 50.2% chemical oxygen demand (COD), 100% and 85.1% ammonium nitrogen (NH3-N) under gradient increase salinity along process. Meanwhile, this has good ability to adapt influe...

After more than ten years of water injection development, the cut in main block oilfield B has increased rapidly and production decreased significantly. In view rapid rise comprehensive current oilfield, it is necessary to carry out research on development law reasonable boundary various adjustment indexes, so as clarify different stages The status index change under oil rates provide an accura...

this study investigated the microbial community in a full scale anaerobic baffled reactor and sequencing batch reactor system for oil-produced water treatment in summer and winter. the community structures of fungi and bacteria were analyzed through polymerase chain reaction–denaturing gradient gel electrophoresis and illumina high-throughput sequencing, respectively. chemical oxygen demand eff...

The produced water-containing polymer brings new challenges to oil-water separation in oilfield production, yet separators with coalescing plates remove free water have been playing an active role. In this paper, the flow-field characteristics of polymer-laden a separator are analyzed using computerized mathematical methods investigate effects content 55%, 70%, and 85%, flow rate 3500 m3/d, 480...

Enterobacter mori strain 5-4 is a Gram-negative, motile, rod shaped, and facultatively anaerobic bacterium, which was isolated from a mixture of formation water (also known as oil-reservior water) and crude-oil in Karamay oilfield, China. To date, there is only one E. mori genome has been sequenced and very little knowledge about the mechanism of E. mori adapted to the petroleum reservoir. Here...

Abstract The C oilfield is located in the Bohai Bay Basin, a typical strong bottom water reservoir. Oilfield reservoir and oil–water distribution are complex. At present, has entered high cut development stage, it challenging to stabilize oil control water. with an imperfect well pattern dominant ridge channels, uneven interface uplift, limited drive sweep range, low inter-well production degre...

Abstract In this study, nickel nanoparticles (NiNPs) were synthesized and utilized for removing dispersed oil from oilfield-produced water in Sudan. The synthesis process involved using two concentrations of hydrazine as a reducing agent sodium hydroxide solvent. Physiochemical characterizations, such X-ray diffraction (XRD) transmission electron microscopy (TEM), confirmed the successful prepa...

When an oilfield is developed with a polymer drive, the injected will play role in improving already formed dominant channel between oil and water wells, but after drive block transferred to subsequent development, inefficient circulation field of be wells again. This paper mainly applies dynamic static data, combined analysis adjustment optimization software high water-bearing oilfield, identi...