The Application of Induction Logging Adaptive Deconvolution Processing in Water Flooded Recognition

2013 ◽  
Vol 734-737 ◽  
pp. 452-457
Author(s):  
Ke Zeng ◽  
Mei Ling Zhang ◽  
Lei Feng ◽  
Ke Na Yang
Keyword(s):  
Processing Method ◽  
Oil Field ◽  
Water Flooding ◽  
Low Permeability ◽  
Oil Reservoir ◽  
Induction Logging ◽  
Longitudinal Resolution ◽  
Low Porosity

The adaptive deconvolution processing is a kind of processing method for different background conditions. The reservoir of FuYang group in Yushulin oil field has the typical uneven feature with low porosity and low permeability. After the oil reservoir flooded by ejecting water, the zones without water and the zones with water interlaced with each other, that makes the induction logging curves with lower longitudinal resolution hardly reflect actual water-flooding condition. This paper takes adaptive deconvolution processing method selecting background conductivities according to the measurement points’ conductivities, which improve the resolution of induction logging data significantly. The processing value of resistivity is similar with the true formation resistivity.This method is better on identifying the water flooded condition of the oil reservoir.

Study of Oil Displacement Performance of Hydroxyl Sulfobetaine Surfactant

2013 ◽  
Vol 853 ◽  
pp. 223-228
Author(s):  
Pu Yue ◽  
Fan Zhang ◽  
Hui Li Fan
Keyword(s):  
Interfacial Tension ◽  
Crude Oil ◽  
Mass Fraction ◽  
Volume Fraction ◽  
Oil Field ◽  
Water Flooding ◽  
Actual Condition ◽  
Oil Reservoir ◽  
Oil Film ◽  
Oil Displacement

In this paper, new alkali-free hydroxyl sulfobetaine surfactant designed for the target oil reservoir in our laboratory was used. The interfacial tension property, emulsifying capability, peeling the oil film between surfactant/polymer binary oil-displacing system and the target crude oil and the viscosity of the system were investigated systematically. Finally, oil-displacement capacity of the binary oil-displacing system on the target reservoirs natural cores was discussed. The experimental results indicated under the actual condition of the target oil reservoir with total salinity ranging from 4694mg/L to 24270mg/L and temperature being 50°C, the surfactant/polymer binary oil-displacing system with surfactant mass fraction ranging from 0.025% to 0.2% and polymer mass fraction of 0.15% could reach ultra-low interfacial tension with the target crude oil rapidly. The surfactant/polymer binary system above mentioned could emulsified crude oil easily and the volume fraction of WinsorIII middle phase microemulsion could be up to 53.06%. It also could peel the oil film adhered to oil-wet quartz plate quickly and increase the viscoelastic of surfactant/polymer binary oil-displacing system slightly. The displacement experiments made by using natural core in the target oil field indicated that oil recovery was improved by 15% after water flooding. All these results showed that hydroxyl sulfobetaine surfactant had a good potential for flooding in EOR.

Effective use Model of Low Permeability Oil Reservoir

2013 ◽  
Vol 753-755 ◽  
pp. 53-57
Author(s):  
Liang Dong Yan ◽  
Zhi Juan Gao ◽  
Feng Gang Dai
Keyword(s):  
Fluid Flow ◽  
Pressure Gradient ◽  
Seepage Flow ◽  
Oil Field ◽  
Low Permeability ◽  
Oil Reservoir ◽  
Reservoir Fluid ◽  
Start Up ◽  
Well Pattern ◽  
Effective Use

The throat of low permeability oil reservoir is narrow and small, the reservoir fluid flow resistance is big, and with the start-up pressure gradient, compare with medium and high permeability reservoir fluid flow, the characteristics are obviously different in performance for non-darcy flow at low speed. This kind of oil field reservoir started in the process of mining scope is small, the degree of use and the development effect is low. To solve these problems, this paper established considering start-up pressure gradient of the new unstable seepage flow mathematical model of non-darcy radial flow which the analytical solution and the productivity equation is deduced, established the effective radius of the use of low permeability reservoirs, and systemicly researched the calculation method of area well pattern of different types of non-darcy seepage.

The Research of Layer System Subdivision and Adjustment Methods in YSL Block of the Low Permeability Reservoirs

2013 ◽  
Vol 274 ◽  
pp. 153-156
Author(s):  
Rong Hua Li ◽  
Jun Ting Zhang ◽  
Cheng Lin Zhang ◽  
Huan Huan Zhang ◽  
Peng Qu
Keyword(s):  
Water Injection ◽  
Oil Field ◽  
Thin Layers ◽  
Water Flooding ◽  
Low Permeability ◽  
Layer System ◽  
Oil Distribution ◽  
Major Adjustment ◽  
Low Permeability Reservoirs ◽  
Oilfield Development

Layer system subdivision and adjustment is applied in oilfield development to ease the contradiction in inner-layer and interlayer and implement separated layer water flooding well, which is a major adjustment measure to improve developing effects. YSL is a typical low-permeability oil field, whose petrophysics is poor, and which exist many problems, such as apparent contradictions between layers, and poor development effects through separated zone water injection and so on. In this article, the thickness of barriers, injection profile, permeability contrast and remaining oil distribution are analyzed comprehensively. So a reasonable method is also proposed. Much weakness that factors are not comprehensive in adjustment method and that the problems in the development process are not accurately reflected is overcome, which exists in the past methods. The adjustment means can utilize poor thin layers better, reduce invalid water injection and ease the contradictions between layer, and oilfield development effects are improved eventually. It is a reference and guidance for other blocks or oilfield which exist the same problems.

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.

Study on Application of Low Velocity Non-Darcy Flow

2014 ◽  
Vol 1078 ◽  
pp. 129-133
Author(s):  
Xian Kang Xin ◽  
Gao Ming Yu ◽  
Zhuo Li
Keyword(s):  
Heavy Oil ◽  
Percolation Theory ◽  
Oil Field ◽  
Oil Fields ◽  
Low Permeability ◽  
Oil Reservoir ◽  
Low Velocity ◽  
Production Index ◽  
Heavy Oil Reservoir ◽  
The Impact

The seepage underground is rather complicated in the low permeability reservoir and the heavy oil reservoir. One important point to note is that the seepage in these reservoirs does not follow Darcy's law, which brings difficulty to the development of oil field. Study on low velocity non-Darcy percolation theory, the impact on oil production index is analyzed. The key is the summary of the application in order to provide theoretical references for the rational exploitation of the relevant oil fields.

Study of Enhancing Water Adsorbing Index by Nanometer-Sized Silicon Oxide in Water Injection Well

2007 ◽  
Vol 121-123 ◽  
pp. 1497-1500 ◽  
Author(s):  
Hai Wen Wang
Keyword(s):  
Flow Resistance ◽  
Silicon Oxide ◽  
Water Injection ◽  
Injection Pressure ◽  
Paper Analysis ◽  
Injection Well ◽  
Water Flooding ◽  
Low Permeability ◽  
Oil Reservoir ◽  
Phase Permeability

Nanometer-sized silicon oxide can be used in water flooding in oil development because of its super hydrophobic and oleophilic ability. In oil reservoir, these nanomaterials are usually physically adsorbed on the surface of sandstone and improve the wettability and water phase permeability. Therefore flow resistance is reduced and water adsorbing index is increased. Both experiment and application results show that nanometer silicon oxide is an excellent material used for water flooding, water injection pressure and ability of adsorping water in low permeability reservoir. The paper analysis the mechanism of increasing water adsorbing index and discuss the conditions for selecting water injection well.

Low Permeability Reservoir Water Displacing Oil and Water Flooding Characteristic Curve Theory

2014 ◽  
Vol 556-562 ◽  
pp. 4701-4704
Author(s):  
Chun Sen Zhao ◽  
Qing Lin Ren ◽  
Pei Jing Li
Keyword(s):  
Characteristic Curve ◽  
Water Injection ◽  
Oil Field ◽  
Water Flooding ◽  
Practical Significance ◽  
Low Permeability ◽  
Reservoir Water ◽  
Field Development ◽  
Recoverable Reserves ◽  
The Impact

The so-called water flooding characteristic curve refers to the oilfield water injection (or natural water drive) development process, a relationship between curve cumulative oil production, cumulative water production and accumulation of fluid production. These curves have been widely used for water injection development of dynamic and recoverable reserves forecast. After many years of practical application, summed up the four kinds of water drive characteristic curve, they have a good practical significance. Recoverable reserves are important indicators of field development is the main basis for planning and design, the application of waterflooding characteristic curve can be predicted oil recoverable reserves. Four water flooding characteristics discussed above curve is mainly applied in high-permeability oil field, which did not consider starting pressure, but should consider the impact of low permeability oilfield actuating pressure gradient on the moisture content.

Parameters for Assessing Oil Reservoir Water Flooding Additives

2009 ◽  
Vol 131 (3) ◽  
Author(s):  
Nico Reuvers ◽  
Michael Golombok
Keyword(s):  
Fluid Flow ◽  
Shear Rate ◽  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Water Flooding ◽  
Low Permeability ◽  
Oil Reservoir ◽  
Reservoir Water ◽  
Figures Of Merit ◽  
Relative Retardation

This paper is concerned with deriving parameters for assessing the effectiveness of fluid additives to improve water flooding during enhanced oil recovery. We focus particularly on the use of rheological modifiers, which do not show monotonic behavior with the shear rate within the rock pores. We derive figures of merit based on (1) relative retardation in high and low permeability rock, (2) profile flattening, and (3) injectivity index. Only the last of these provides a measure of water flood profile improvement while maintaining sufficient fluid flow and production levels.

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