Effects of Microbial Degradation over Heavy Oil and Oilfield Test

2012 ◽  
Vol 524-527 ◽  
pp. 49-55
Author(s):  
Zhao Yong Jiang ◽  
Ting Shan Zhang ◽  
Xiao Hui Chen ◽  
Guang Zhi Lan
Keyword(s):  
Oil Recovery ◽  
Microbial Degradation ◽  
Heavy Oil ◽  
Freezing Point ◽  
Recovery Ratio ◽  
Heavy Oils ◽  
High Recovery ◽  
Oil Exploitation ◽  
Recovery Cost ◽  
Enhance Oil Recovery

Heavy oils are abundant in resins and asphaltenes, and they have the characters of high freezing point, low flowing ability, difficult oil recovery and high recovery cost. Microbial degradation can effectively improve the properties of heavy oils and enhance oil recovery ratio. According to distinctive properties of heavy oils from different oilfields, identical microbial assemblies are sifted and incubated. Then the assemblies are used to degrade the heavy oils in oilfield. The results indicated that microbes selected could degrade resins and asphaltenes in heavy oils. Oilfield tests in Qinghai and Xinjiang Oilfield proved that microbial degradation is evident in enhancing recovery ration and is feasible and economical in heavy oil exploitation.

Environmentally-Friendly Production and Recovery Processes for Heavy Oils

2021 ◽  
Author(s):  
Celal Hakan Canbaz ◽  
Cenk Temizel ◽  
Yildiray Palabiyik ◽  
Korhan Kor ◽  
Luky Hendrandingrat ◽  
...  
Keyword(s):  
Oil Recovery ◽  
Heavy Oil ◽  
Oil And Gas ◽  
Steam Injection ◽  
Developed Countries ◽  
Green Energy ◽  
Heavy Oils ◽  
Recovery Processes ◽  
Injection Process ◽  
Environmental Footprints

Abstract Oil Industry is going green and there is no solid and comprehensive publication that outlines the use of green energies and methods in oil recovery. Thus, this paper is going to close that gap. As there are more environmental restrictions especially in developed countries, inclusion of green energy methods in petroleum recovery processes is very important for the future of these reserves. We will focus on extra/heavy oil as conventional oil is simpler to produce and doesn't need EOR processes that may come with environmental footprints. The objective of this study is to investigate and outline the ‘green’ production and recovery processes of heavy oil recovery in environmentally-sensitive locations where greenhouse gas emissions, type of energy used to extract oil and gas (e.g., generation of steam using natural gas vs solar), environmental impact of surface facilities, transportation of produced oil and gas and other associated materials/chemica ls required for recovery (e.g. solvents for steam injection process) are critical for the operations as well as economics.

Enhance Oil Recovery for Steam Flooding: Low-Temperature Oxidative Decomposition of Heavy Oil with Air Injection

2015 ◽  
Vol 29 (10) ◽  
pp. 6242-6249 ◽  
Author(s):  
Changjiu Wang ◽  
Huiqing Liu ◽  
Zhanxi Pang ◽  
Jing Wang ◽  
Changyong Chen ◽  
...  
Keyword(s):  
Low Temperature ◽  
Oil Recovery ◽  
Heavy Oil ◽  
Air Injection ◽  
Oxidative Decomposition ◽  
Steam Flooding ◽  
Enhance Oil Recovery

Current Situation and Prospect of Microbial Residual Oil Gasification

2013 ◽  
Vol 295-298 ◽  
pp. 21-25
Author(s):  
Dong Xing ◽  
Yong Feng Li ◽  
Li Wei ◽  
Jing Wei Zhang
Keyword(s):  
Oil Recovery ◽  
Microbial Degradation ◽  
High Water ◽  
Oil Reservoir ◽  
Recovery Efficiency ◽  
Residual Oil ◽  
Environment Friendly ◽  
New Research ◽  
Enhance Oil Recovery ◽  
Gasification Technology

Most Oilfield of China has been a stage of Oil recovery with high water, microbial residual oil gasification technology as the oilfield's reserves technology has a good application prospect, especially the use of microorganisms for gasification of residual oil. The study has far-reaching significance, and it mainly turns the difficult mining oil reservoir into natural gas (mainly methane) through microbial degradation. It is the most effective, economical and environment-friendly way to enhance oil recovery efficiency and to extend the reservoir life. This paper summarized the relevant principles of oil microbial degradation and gasification, microbial enhanced oil recovery and Residual oil gasification at home and abroad, and come up with a few new research ideas.

scholarly journals Using Polymer Alternating Gas to Enhance Oil Recovery in Heavy Oil

2018 ◽  
Vol 113 ◽  
pp. 012182 ◽  
Author(s):  
Yongzhi Yang ◽  
Weirong Li ◽  
Tiyao Zhou ◽  
Zhenzhen Dong
Keyword(s):  
Oil Recovery ◽  
Heavy Oil ◽  
Enhance Oil Recovery

Degradation of Polyacrylamide: A Review

2013 ◽  
Vol 800 ◽  
pp. 411-416 ◽  
Author(s):  
Luo Yi ◽  
Ke Zhi Li ◽  
De Xin Liu
Keyword(s):  
Oil Recovery ◽  
Waste Water Treatment ◽  
Economic Effects ◽  
Water Soluble ◽  
Chemical Degradation ◽  
Oil Well ◽  
Well Production ◽  
Paper Making ◽  
Oil Exploitation ◽  
Enhance Oil Recovery

Water-soluble polyacrylamide is commercially available in different domains of industry, such as water purified, paper making, pharmacy, agriculture and oil exploitation. Especially polyacrylamide is used for polymer displacement, which can enhance oil recovery through increasing the sweeping efficiency. Good economic effects are achieved by the industrial application of polymer in various oil fields. However, some problems of the oil-well production and the waste water treatment come forth with the present of polyacrylamide in the production fluid. It is maybe an efficient mean to solve it with the degradation of polyacrylamide. So, this paper reviews the lately development on the research of the degradation of polyacrylamide, especially including ultrasonic degradation, thermal degradation, biodegradation and chemical degradation.

Mechanisms of Enhancing Recovery of the Superficial Heavy Oil Reservoir

2012 ◽  
Vol 550-553 ◽  
pp. 468-471
Author(s):  
Fu Sheng Zhang ◽  
Jian Ouyang ◽  
De Wei Wang ◽  
Xin Fang Feng ◽  
Li Qing Xu
Keyword(s):  
Oil Recovery ◽  
Heavy Oil ◽  
Water Flooding ◽  
Chemical Agent ◽  
Oil Reservoir ◽  
Displacement Efficiency ◽  
Oil Displacement ◽  
Oil Displacement Efficiency ◽  
Heavy Oil Reservoir ◽  
Enhance Oil Recovery

The core displacement experiments show that displacement system containing chemical agent can enhance oil recovery by over 20% comparing to water flooding. Mechanisms by which chemical agent enhance oil recovery of heavy oil reservoir water flooding are: (1) improving mobility ratio by significantly decreasing viscosity of heavy oil, volumetric sweep efficiency is improved; (2) increasing capillary number by significantly decreasing oil-water interfacial tension, oil displacement efficiency is increased; (3) changing wettability of the rock surface from oil-wet to water-wet by significantly reducing the contact angle between displacement liquid and sandstone surface, capillary force is changed from the resistance force to the motive force, the residual oil is expelled from the small pores and the wall of pores, oil displacement efficiency is significantly increased.

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