Advance Water-Flooding to Reduce the Stress Sensitivity Affect on Low Permeability Reservoir Development

2011 ◽  
Vol 361-363 ◽  
pp. 520-525
Author(s):  
Jun Feng Yang ◽  
Han Qiao Jiang ◽  
Han Dong Rui ◽  
Xiao Qing Xie
Keyword(s):  
Physical Simulation ◽  
Physical Property ◽  
Stress Sensitivity ◽  
Water Flooding ◽  
Low Permeability ◽  
Formation Pressure ◽  
Exponential Relationship ◽  
Low Permeability Reservoir ◽  
Reservoir Development ◽  
Water Cut

Physical simulation experiments were made to research on the stress sensitivity on physical property of low permeability reservoir rocks. The experimental results shown that effective pressure had good exponential relationship with reservoir permeability. Combining with materaial balance method, reservoir engineering and rational deducation was made to reserach on water-flooding timing of low permeability reservoir development. Several production targets were obtained by these method, such as formation pressure, water and oil production, water cut and so on. The results shown that advanced water-flooding was very important in low permeability reservoir development to reduce the bad impact of stress sensitivity on formation permeability and maintain formation pressure.

A Study of Influential Factors of Advance Water Injection in Extra-Low Permeability Reservoir

2014 ◽  
Vol 487 ◽  
pp. 255-258
Author(s):  
Jin Gang He ◽  
Kao Ping Song ◽  
Jing Yang ◽  
Bao Gang Sun ◽  
Si Chen ◽  
...  
Keyword(s):  
Pressure Gradient ◽  
Early Stage ◽  
Retention Rate ◽  
Water Injection ◽  
Stress Sensitivity ◽  
Influential Factors ◽  
Low Permeability ◽  
Formation Pressure ◽  
Low Permeability Reservoir ◽  
Start Up

This paper study on the permeability, start-up pressure gradient and stress sensitivity of advance water injection in extra-low permeability reservoir in Fuyu Oil layer of Daqing Oilfield. Experimental results show that the reasonable formation pressure level should be at about 120% in the advance water injection experiment, advanced water injection in the the early stage have higher oil production, the water breakthrough, earlier than synchronous water injection has certain inhibitory effect of water cut rise; Under the premise of advance water injection can overcome the start-up pressure, the lower the level of the reservoir permeability, the higher improve recovery efficiency of the proportion; permeability retention rate increase by about 22% with 5×10-3μm2 core and effectively overcome the stress sensitivity of low permeability reservoir damage; Advanced water injection can overcome stress sensitivity and restoring formation pressure, all that influence the start-up pressure gradient, which significantly reduce the start-up pressure gradient.

Influencing Factor Study of CO2-Assisted Gravity Drainage in Extra-Low Permeability Reservoir

2013 ◽  
Vol 734-737 ◽  
pp. 1400-1405
Author(s):  
Huang Wang ◽  
Xin Wei Liao ◽  
Meng Meng Li ◽  
Ning Lu ◽  
Yu Li Lv ◽  
...  
Keyword(s):  
Influencing Factors ◽  
Oil Recovery ◽  
Influencing Factor ◽  
Water Flooding ◽  
Gravity Drainage ◽  
Low Permeability ◽  
Well Placement ◽  
Low Permeability Reservoir ◽  
Reservoir Development ◽  
Factor Study

CO2flooding is an important method of enhancing oil recovery (EOR) in extra-low permeability reservoir, which can resolve the problems of water flooding effectively. The EOR theory and influencing factors of CO2-assisted gravity drainage were studied in this paper. The influencing factors, such as reservoir dip, injection volume, injecting position, well placement and reservoir effective thickness were analyzed and optimized based on the theoretical numerical model which had been established according to Tuha Niuquanhu inclined reservoir parameters. This research indicates that CO2-assisted gravity drainage can effectively EOR if appropriate parameters were adopted. The results of this paper can offer suggestions to similar reservoir development.

scholarly journals Experimental Study of the Feasibility of Air Flooding in an Ultra-Low Permeability Reservoir

2016 ◽  
Author(s):  
Guohui Qu ◽  
Yuanlin Meng ◽  
Anqi Shen ◽  
Yuxin Guo ◽  
Yikun Liu ◽  
...  
Keyword(s):  
Experimental Study ◽  
Oil Recovery ◽  
Physical Property ◽  
Water Flooding ◽  
Low Permeability ◽  
Low Temperature Oxidation ◽  
Temperature Oxidation ◽  
Low Permeability Reservoir ◽  
Relationship Of ◽  
The Relationship

The development effect of water flooding in ultra-low permeability reservoir was poor due to its poor physical property and high shale content, the experimental study of air flooding which help to complement producing energy was carried out. Based on the Accelerating Rate Calorimeter experimental results, the crude oil of N block in L oilfield can produce low-temperature oxidation reaction, which was the basic condition of air flooding. Three groups of experiment natural cylinder core were designed for oil displacement, water flooding and air flooding were used respectively, and the relationship of differential pressure, oil recovery, injection capacity with injection volume was investigated. It has been showed on the result that the recovery efficiency improved sharply than water flooding, the effect of depressurization and augmented injection was obvious, and the air displacement was validation.

Mechanisms of Mass Exchange Between Light Oiland Petroleum Gas in Low-Permeability Reservoir Development Process

2018 ◽  
Vol 54 (4) ◽  
pp. 457-466
Author(s):  
P. A. Gushchinu ◽  
A. N. Cheremisin ◽  
N. G. Glavnov ◽  
P. M. Zobort ◽  
N. A. Svarovskaya ◽  
...  
Keyword(s):  
Mass Exchange ◽  
Development Process ◽  
Low Permeability ◽  
Low Permeability Reservoir ◽  
Reservoir Development

Experimental Study on Stress Sensitivity of Ultra-Low Permeability Sandstones

2013 ◽  
Vol 318 ◽  
pp. 279-283 ◽  
Author(s):  
Hai Yong Zhang ◽  
Shun Li He ◽  
Guo Hua Luan ◽  
Shao Yuan Mo ◽  
Zhi Kai Lv ◽  
...  
Keyword(s):  
Experimental Study ◽  
Stress Sensitivity ◽  
Great Benefit ◽  
Experimental Results ◽  
Low Permeability ◽  
The Real ◽  
Low Permeability Reservoir ◽  
Permeability Variation ◽  
Stress Dependent ◽  
Ultralow Permeability

Ultra-low permeability rocks have plenty of microfractures. The stress-dependent permeability has a significant impact on the seepage. Previous studies are mainly on the permeability variation with stress in low permeability reservoir. But few are involved in ultralow permeability cores. In this paper, the experiment of stress sensitive ultralow permeability cores which are fabricated (both matrix cores and microfracture cores) is conducted. The experimental results shows that the permeability of microfracture low permeability cores which are fabricated increases greatly while the porosity of low permeability cores is little affected. This indicates that the fabricated microfracture cores are in line with that of the real situations of fracture media reservoir. By comparison, the permeability stress sensitive hysteresis degree of microfracture cores is not apparent and the permeability recovery degree is high in the unloading cycle. This study is of great benefit to reveals the stress sensitivity features of ultralow permeability reservoir

Mechanism and Application Effect of Compound Perforation Fracturing Technology in Low Permeability Reservoir

2014 ◽  
Vol 675-677 ◽  
pp. 1500-1504
Author(s):  
Zeng Li Xiao ◽  
Yong Jie Fan ◽  
Jun Bin Chen
Keyword(s):  
Oil And Gas ◽  
Influence Factor ◽  
Physical Property ◽  
Low Permeability ◽  
Gas Field ◽  
Low Permeability Reservoir ◽  
Fracture Pressure ◽  
Compaction Band ◽  
Oil And Gas Field ◽  
The Cost

Compound perforation fracturing technology is a space combination type ultra-deep perforating that can overcome some flaws conventional perforation has, such as shallow penetration and compaction damage. It can remove the compaction band and near wellbore pollution in rock matrix which results from conventional perforation. This paper introduces the theory of effect and influence factor of compound perforation fracturing technology and summarize the advantages for low permeability gas well on the basis of analyzing the mechanism of action about increase production of compound perforation. In order to evaluate the effects of application of this technology in in low permeability reservoir, 11 compound perforation wells and 12 conventional perforation wells were selected which have the similar physical property and the evaluation was conducted in two blocks. The results show that compound perforation can make the formation fracture pressure decrease in 3~5MPa and increase the permeability near the perforation channel. This technology has better effects than the conventional and decrease the cost effectively, improving production in low permeability oil and gas field.

Low Permeability Reservoir Quantitative Analysis of Diagenesis Evolution - Taking Xishanyao Reservoir in Niuquanhu Area as an Example

2015 ◽  
Vol 1092-1093 ◽  
pp. 1410-1415
Author(s):  
Yuan Kang ◽  
Wei Sun ◽  
Ting Shang ◽  
Jian Chao Shi ◽  
Jun Sheng
Keyword(s):  
Quantitative Analysis ◽  
Physical Property ◽  
Low Permeability ◽  
Reservoir Properties ◽  
Thin Sections ◽  
Low Permeability Reservoir ◽  
Quantitative Calculation ◽  
Pore Evolution ◽  
Calculation Results ◽  
The Impact

The Xishanyao reservoir in Niuquanhu area is a typical low permeability reservoir Diagenesis is very important for the physical property of reservoir. Through analyzed data of cast thin sections and scanning electron microscopy (SEM) data, analyzed the impact of main diagenesis on reservoir properties in Niuquanhu area. First, quantitative analyzed the various types of diagenesis on reservoir porosity contribution rate. Second, through restoring the original porosity, quantitative analyzed the pore evolution of reservoir caused by various types of diagenesis. Realized the quantitative analysis of porosity of each diagenesis stage. The quantitative calculation results agree well with the experimental analysis results, the error is 1.09%~1.51%, which showed the rationality of research method and the research results have certain reliability. The study of diagenesis has important significance for fine evaluation and favorable area prediction of Niuquanhu area reservoir.

The Application of Dynamic Development Data in Low-Permeability Reservoir Water Flooded Layer Identification

2015 ◽  
Vol 733 ◽  
pp. 148-151 ◽  
Author(s):  
Mei Ling Zhang ◽  
Fei Guo ◽  
Jian Hua Lin
Keyword(s):  
Analysis Data ◽  
Identification Accuracy ◽  
Water Flooding ◽  
Low Permeability ◽  
Oil Well ◽  
Reservoir Water ◽  
Low Permeability Reservoir ◽  
Development Data ◽  
Single Well ◽  
Sand Bodies

Due to the influence of the environment of measurement and complex pore structure in low-permeability reservoir, we use single-well logging data alone to discriminate the degree of reservoir flooded has multiple solutions. In the water flooding procedures, water well and oil well have formed a dynamic developing unit. And with the water propelling, some sand bodies were flooded by water before the well was drilled. The dynamic information of developed wells in connected sand bodies (such as moisture rate and minimum layer water absorption profile, etc.), can reflect the level of water-flooded in some degree. This paper construct the rules of distinguishing the water flooded layer by dynamic analysis data on the basic of dynamic developing unit, which has prolonged the identification accuracy of water flooded layer degree of low-permeability reservoir efficiently.

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