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.

Residual Oil Distribution and Stimulation for SZ 36-1 Oilfield in High Water-Cut Stage

2014 ◽  
Vol 675-677 ◽  
pp. 1530-1534
Author(s):  
Biao Li ◽  
Hong Zhang
Keyword(s):  
Oil Recovery ◽  
High Water ◽  
Oil Well ◽  
Residual Oil ◽  
Oil Distribution ◽  
High Water Cut Stage ◽  
High Water Cut ◽  
Reservoir Description ◽  
Water Cut ◽  
Enhance Oil Recovery

SZ 36-1 oilfield has entered high water cut stage, and thus research on the distribution of oil is important for tapping potential in oilfield. In this paper, the distribution of residual oil of SZ 36-1 oilfield was discussed by fine reservoir description and dynamic analysis. The saturation of residual oil at faults, “died oil” between two well, the top of positive rhythm sand body and low (no) permeability interlayer is higher than other situations. We point out that infilling adjustment wells, increasing the oil well productivity and structure adjustment of produced liquid are efficient measures to enhance oil recovery for SZ 36-1 oilfield .

The Current Condition of Novo-Elhovskoe Oil Field Production and Actions on Increase of Residual Oil Recovery Efficiency

2003 ◽  
Author(s):  
Yu.A. Kotenev ◽  
A.V. Chibisov ◽  
A.G. Nugaibekov ◽  
R. A. Nugaibekov ◽  
O.V. Kaptelinin
Keyword(s):  
Oil Recovery ◽  
Oil Field ◽  
Recovery Efficiency ◽  
Residual Oil ◽  
Field Production

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.

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.

A Grey Relationship Method for Predicting Efficiency of Steam Flooding

2011 ◽  
Vol 361-363 ◽  
pp. 441-444
Author(s):  
Wei Zhang ◽  
Zhi Ping Li ◽  
Yu Wang
Keyword(s):  
Oil Recovery ◽  
Accurate Method ◽  
Oil Reservoir ◽  
Good Match ◽  
Absorption Effect ◽  
Steam Flooding ◽  
Correlation Degree ◽  
Heavy Oil Reservoir ◽  
Complex Relationships ◽  
Enhance Oil Recovery

The steam flooding is one common way used to enhance oil recovery of heavy oil reservoir. It is difficult to use conventional treatment on steam flooding analysis because of numerous effective factors, complex relationships and no certain mapping relation among those factors. This paper applies grey relationship method to analyze correlative degree of the factors which effect on steam flooding, and then selects steam absorption effect as the comparative indicator, finally gets a sort of steam flooding effect of different parameters. Each correlation degree has a good match with steam flooding effect, and the higher of correlation degree the better of steam flooding effect. Grey relationship is an effective, fast and accurate method for appraising steam flooding effect.

scholarly journals Response to the Variation of Clay Minerals During ASP Flooding in the Saertu Oilfield in the Songliao Basin

2021 ◽  
Vol 9 ◽  
Author(s):  
Liang Yingjie ◽  
Liang Wenfu ◽  
He Wang ◽  
Li Zian
Keyword(s):  
Clay Minerals ◽  
Oil Recovery ◽  
High Water ◽  
Songliao Basin ◽  
Residual Oil ◽  
Pore Throat ◽  
Asp Flooding ◽  
High Water Cut Stage ◽  
High Water Cut ◽  
Water Cut

In this paper, the variation of clay minerals and their influence on reservoir physical properties and residual oil before and after ASP flooding are analyzed. The results show that the total amount of clay minerals in reservoirs decreases after ASP flooding in the ultra-high-water-cut-stage reservoirs of the Naner Zone in the Saertu Oilfield, Songliao Basin. Therein, the illite content reduces, while the content of illite smectite mixed-layer and chlorite increases. The content of kaolinite varies greatly. The content of kaolinite decreases in some samples, while it increases in other samples. The clay minerals block the pore throat after ASP flooding. As a result, the pore structure coefficient and the seepage tortuosity increase, the primary intergranular pore throat shrinks, and the pore–throat coordination number decreases. Nevertheless, the dissolution of clay minerals reduces the pore–throat ratio and increases porosity and permeability. The variation of clay minerals after ASP flooding not only intensifies the reservoir heterogeneity but also affects the formation and distribution of residual oil. The residual oil of the oil–clay mixed adsorption state is a newly formed residual oil type related to clay, which accounts for 44.2% of the total residual oil reserves, so it is the main occurrence form of the oil in reservoirs after ASP flooding. Therefore, the exploitation of this type of residual oil has great significance to enhance the oil recovery in ultra-high-water-cut-stage reservoirs.

scholarly journals Study On Oil Reservoir Productivity Performance Via Combination of Taguchi and BEM Analyses

2007 ◽  
Vol 3 (1) ◽  
Author(s):  
Mohamad Nasir Mohamad Ibrahim ◽  
Solehuddin Shuib
Keyword(s):  
Oil Recovery ◽  
Influencing Factor ◽  
Reservoir Rock ◽  
Oil Reservoir ◽  
Oil Viscosity ◽  
Reservoir Performance ◽  
Recovery Techniques ◽  
Fluid Properties ◽  
The Right ◽  
Enhance Oil Recovery

The application of Taguchi Robust Design Technique (TRDT) coupled with the Boundary Element Method (BEM) in analyzing the productivity performance of an oil reservoir is presented in this paper. Several reservoir rock and reservoir fluid properties; i.e. permeability, thickness, porosity and viscosity, were chosen in this study. The BEM allows the overall simulation of reservoir performance to be made; whereas the used of TRDT allows us to rank the most influencing factor (property) that affects the productivity performance of the reservoir. Numerical values obtained from the BEM analysis will be used as input data for the TRDT statistical analysis. Results indicated that oil viscosity is the most important factor that affects the productivity performance of the oil reservoir followed by the thickness of the pay zone, the rock permeability and the rock porosity. Results of this study can be used by reservoir engineer in making the right choice of Enhance Oil Recovery techniques that is the most suitable for the reservoir.

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