Low Permeability Fractured Reservoir Drive CO2 Plugging Technology

2013 ◽  
Author(s):  
Wang Feng ◽  
Zhang Yingan ◽  
Yu Chuntao ◽  
Jin Xuechao
Keyword(s):  
Low Permeability ◽  
Fractured Reservoir

An Experimental Study on Adaptability of a Novel Living Polymer Used in Low Permeability Fractured Reservoir

2013 ◽  
Vol 631-632 ◽  
pp. 140-144
Author(s):  
Li Li
Keyword(s):  
Oil Recovery ◽  
Volume Expansion ◽  
Concentration Ratio ◽  
Produced Water ◽  
Water Injection ◽  
Low Permeability ◽  
Fractured Reservoir ◽  
Injection Volume ◽  
Swelling Rate ◽  
Injection Property

In this paper, the produced water in Daqing oilfield was detected, includes the viscosity and concentration ratio of living polymer (LH-1), interfacial tension and swelling rate of particle polymer (LHP-1). And its adaptability in low permeable fracture core was also tested. The results show that the injection property is good if the living polymer (LH-1) and the particle polymer (LHP-1) are used together, the volume-expansion particle polymer can effectively plugging the high permeable layer in bottom of the reservoir and improve water injection profile. The best injection volume of LH-1is 0.32 PV, and enhances oil recovery rate is 18.4%.

Characteristics of Fracture and Fractured Reservoir of Hailaer Basin Budart Group

2013 ◽  
Vol 316-317 ◽  
pp. 826-829
Author(s):  
Cui Ju Feng ◽  
Wei Lin Yan
Keyword(s):  
Oil And Gas ◽  
Low Permeability ◽  
Fractured Reservoir ◽  
Fracture Density ◽  
High Angle ◽  
Pore System ◽  
Reservoir Evaluation ◽  
Angle Fracture ◽  
Conventional Logs ◽  
Huge Challenge

The output of fracture pool is over half of the entire outout of oil and gas,and fracture pool is one of the important fields of oil inhancing yield in 21st Century. Fractured reservoir evaluation is always a huge challenge for the oil exploration and development. Budart Group of Sudert district in Hailaer Basin is a reservoir that has very low porosity、very low permeability、double pore system and it is rich of fracture. The paper summarized Hailaer Basin Budart Group reservoir’s characteristics, especially fractures’s characteristics in conventional logs,fracture’s parameters,such as fracture density,dip,width and filling and illustrate the response of low angle fracture and high angle fracture in logs.

Numerical Simulation Study on Advanced Water Injection for Fuyang Ultra-Low Permeability Fractured Reservoir

2013 ◽  
Vol 421 ◽  
pp. 286-289
Author(s):  
Hui Hui Kou ◽  
Xian Gui Liu ◽  
Han Min Xiao ◽  
Ling Hui Sun ◽  
Dong Dong Hou ◽  
...  
Keyword(s):  
History Matching ◽  
Large Scale ◽  
Water Injection ◽  
Sedimentary Facies ◽  
Oil Field ◽  
Water Flooding ◽  
Small Scale ◽  
Low Permeability ◽  
Fractured Reservoir ◽  
Production Ratio

According to the features of low porosity and low permeability fracture as well as small scale of channel development, frequent sedimentary facies changes of planar sandstone, poor connectivity, large variation of sequence thickness and great development difficulties for oil layer in Fuyang Oilfield. In this paper, on the basis of fully considered of fracture features, built a more accurate 3-D geological model. And on the basis of the history matching, determined the formation pressure maintenance level under different injection-production ratio and rational water-flooding timing by the simulation of the different programs in the process advanced water injection development. The results show that: the reasonable injection-production ratio of Fuyang oil layer is 1.4, and the rational water-flooding timing is three months after advanced water injection. This provides theoretical guidance for the large-scale development of Fuyang oil layer, and also provides the technical basis for the developing of the other low permeability fractured oil field by advanced water injection.

scholarly journals Study on Oil-water Two-phase Migration Mechanism of Low Permeability Fractured Core based on the Online NMR Testing

2021 ◽  
Vol 2076 (1) ◽  
pp. 012015
Author(s):  
Xiaomin Zheng ◽  
Ning Li ◽  
Dong Li ◽  
Nan Li
Keyword(s):  
Technology Policy ◽  
Water Injection ◽  
Low Permeability ◽  
Recovery Ratio ◽  
Fractured Reservoir ◽  
Two Phase ◽  
Fracture Width ◽  
Migration Mechanism ◽  
Oil Water ◽  
And Migration

Abstract Understanding the dynamic migration mechanism of oil-water two-phase is the key to improve the effect of water injection development in low permeability fractured reservoir. Based on artificial fracturing of core and basic physical parameter testing, the online NMR displacement experiments of cores with different fracture widths are conducted to analyze the oil-water dynamic distribution characteristics and migration mechanisms. The experimental results show that when water breaks through at the outlet, oil volume in the small pores is basically unchanged. In the large pores it decreases to a certain extent, while in the fracture it decreases greatly. When the displacement is over, oil volume in the small pores still changes little, while it decreases greatly in the large pores, and it is almost zero in the fracture. With the decrease of fracture width, the recovery ratio when waterflooding front breaks through and the final recovery ratio after displacement increase gradually. The contribution proportion of recovery ratio in the fracture decreases as a whole, while in the large pores it increases gradually, and in the small pores it decreases slightly. The research results lay a foundation for the optimal design of fracture parameters and the adjustment of water injection development technology policy in low permeability fractured reservoir.

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