Distribution of Sulfide in an Oil-water Treatment System and a Field Test of Treatment Technology in Daqing Oilfield

Abstract

In recent years, the sulfide in oil-water treatment system of Daqing Oilfield has brought serious problems, to induce electric dehydrator trip and waste oil recycle difficultly and eventually so severe as to prevent further oil productions. The treatment difficulty of wastewater with sulfide will increase, the oily wastewater after treatment will be deteriorated and induce the formation plugging. Meanwhile, the equipments and pipelines will also be seriously corroded. The authors studied the generation and distribution of sulfide in oil water treatment system in Daqing Oilfield and the field test was conducted in the dewatering and wastewater treatment system based on microbiological method. The results showed that the dynamic microcontrol technology could effectively prevent the generation and accumulation of aging oil, avoid frequent electric dehydrator trip, and decrease the labor quantity to ensure the normal production and meet the dehydration standards. The application of this method would bring better profit and environmental benefits for Daqing Oilfield.

Preparation of oil‐water separation network based on the novel strategies of SiO2 ceramic micro‐nano structure and PDMS modification

“…How to efficiently separate oil water mixtures while reducing technical costs and environmental pollution is currently one of the global challenges that need to be addressed. The existing traditional oil water separation methods are approaching maturity in terms of technology and process, such as gravity sedimentation 4 and liquid-liquid swirling flow methods 5 that utilize the density difference between oil and water to separate oil water mixtures, and gas floatation, 6,7 adsorption, 8 and agglomeration methods that achieve oil water separation using carriers or media that can directionally remove oil phases. 9 These methods can achieve better separation results, but they also have different shortcomings.…”

Microflow Mechanism of Oil Displacement by Viscoelastic Hydrophobically Associating Water-Soluble Polymers in Enhanced Oil Recovery

“…Additionally, the polymer should have a strong anti-mechanical degradation ability as a result of the completion involving wire-wrapped and screen gravel-packed sand. Moreover, the long-term stability of the displacing fluid in the formation is important because of the large well spacing in offshore fields [13,14,15]. Therefore, HAWP can overcome the above shortcomings to satisfy these requirements.…”

Based on the Basis Module Library Reuse of Oil Field Simulation Training System Development Research and Application

“…At present oil companies mainly take traditional training methods to train the oil field workers, including three ways: self-study, intensive classes and on-site to observe guidance [2]. With the rapid development of the petroleum industry, the oil companies' requirements of the staff training are getting higher and higher, especially for dangerous jobs or the advanced training without experimental conditions, and the limitations of the traditional training methods also reduce the quality of training and training efficiency [3]. In recent years, virtual reality technology-based training (referred to as virtual training) has rapidly developed in the domestic petrochemical industry, it is mainly used in power systems, oil recovery systems, downhole operating system, drilling systems in the oil industry, it has become an inevitable trend to use the virtual training technology into the oilfield construction [4].…”