Integrated Approach to Identify and Control the Water-Injection Induced Fractures in the Low-Permeability Reservoir

2018 ◽  
Author(s):  
Wang Jinfang ◽  
Zheng Xingfan ◽  
Wang Zhengmao ◽  
Li Baozhu ◽  
Li Yong
Keyword(s):  
Water Injection ◽  
Integrated Approach ◽  
Low Permeability ◽  
Low Permeability Reservoir ◽  
Induced Fractures ◽  
And Control

Parametric Study of Channeling Flow in Low Permeability Reservoir with Mudstone Interlayer

2012 ◽  
Vol 524-527 ◽  
pp. 1190-1195
Author(s):  
Jian Jun Liu ◽  
Quan Shu Li ◽  
Gui Hong Pei
Keyword(s):  
High Pressure ◽  
Water Injection ◽  
Injection Pressure ◽  
Element Model ◽  
Low Permeability ◽  
Low Permeability Reservoir ◽  
Injection Process ◽  
Well Spacing ◽  
Pressure Water ◽  
Channeling Flow

Channeling flow frequently occurs during the high pressure water injection of low permeability reservoir. The injection process is complex and covers so many parameters of which the contribution to channeling flow is necessarily to be studied. In this paper, numerical simulation is combined with sensitivity analysis method to calculate the significance of the weight of parameters to the channeling flow. First the values of different parameters are produced by using Latin hypercube method; second, by using these parameters, finite element model have been established and simulated, and the quantity of channeling flow has been calculated; then Spearman rank relation is applied to measure the relation of parameters and channeling flow. The results states that, in 10 years continuous injection, the well spacing and injection pressure have significant impact on the channeling flow. This states that during the application of high pressure water injection, the pressure and well spacing should be controlled especially.

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.

scholarly journals A Novel Nanodrag Reducer for Low Permeability Reservoir Water Flooding: Long-Chain Alkylamines Modified Graphene Oxide

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Hong Chen ◽  
Lin Xiao ◽  
Yuan Xu ◽  
Xiang Zeng ◽  
Zhong-Bin Ye
Keyword(s):  
Graphene Oxide ◽  
Water Injection ◽  
Injection Pressure ◽  
Water Flooding ◽  
Oxide Surface ◽  
Low Permeability ◽  
Reservoir Water ◽  
Water Contact ◽  
Low Permeability Reservoir ◽  
Modified Graphene Oxide

Chemical modification of graphene oxide (GO) by grafting hydrophobic chains on the surface has drawn much attention nowadays in the academic world, and it was suggested that modified GO could lead to new functionalized materials with specific structure and different properties. In this paper, modified GO (M-GO) were synthesized by chemically grafting alkylamines with varying chain lengths on the graphene oxide surface. Successful grafting of alkylamines was confirmed using Fourier transform infrared (FTIR) spectra, X-ray diffraction (XRD), thermogravimetric analysis (TGA), scanning electron microscope (SEM), and Raman spectroscopy measurements. In addition, we investigated the properties of M-GO as nanodrag reducer in low permeability reservoir water flooding. Water contact angle (CA) measurements revealed that the hydrophobic nature of GO depended on the chain length of the grafted alkylamines. And flooding experiments showed that the hexadecylamine- and octadecylamine-modified GO had an ability to reduce water injection pressure and improve water-phase permeability of the low permeability reservoirs during water flooding. So the M-GO would have potential applications in oilfield exploitation.

scholarly journals Effect evaluation and influencing factors of stratified water injection in low permeability reservoir

2021 ◽  
Vol 292 ◽  
pp. 01014
Author(s):  
Xin Bai ◽  
Shiyan Hao ◽  
Chunfen Guo ◽  
Shenglin Yao
Keyword(s):  
Influencing Factors ◽  
Oil Recovery ◽  
High Efficiency ◽  
Water Injection ◽  
Low Permeability ◽  
Injection Timing ◽  
Effect Evaluation ◽  
Low Permeability Reservoir ◽  
Drive Control ◽  
Injection Effect

The main production layers in Danba oil area of Yanchang oilfield are Chang 4 + 5 and Chang 6 oil layers, which are the main development areas for increasing reserves and production. In view of the unclear influencing factors of water injection effect and the disunity of effect evaluation in the study area, the stratified water injection effect evaluation and influencing factors of low permeability reservoir are studied by means of production data statistical analysis and numerical simulation. The results show that the effect of water injection in the study area is affected by five factors: intraformational heterogeneity, interlayer heterogeneity, interlayer pressure difference, fracture and water injection timing, the results show that the water injection effect is obvious in the study area by using the five indexes of water drive reserves producing degree, water storage rate, water drive index, oil recovery rate and water drive control degree. The research results provide ideas for the study of high-efficiency separate layer water injection in low permeability reservoir, and provide guidance for the next step of potential mining.

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