Characterization and Role of Reservoir Heterogeneity in Performance of Infill Wells in Water Flood and Miscible Projects

Singhal, A.K.; Springer, S.J.

doi:10.2118/2004-265

Cited by 3 publications

(2 citation statements)

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“…The author claims that while the procedure is quick, accuracy declines as heterogeneity rises [22] Wences et al economic analysis (net present value, mobile saturation calculation, the ideal number of extra wells drilled and their locations, compared with primary, secondary, and EOR processes) is used to direct the activities of a reservoir modeling group to determine the best plan to recovery (which could be waterflooding, gas injection or WAG). Using this method significantly reduced both the level of uncertainty and the number of sensitivity analyses that were needed [23].…”

Section: Fig 2 Integration Between Optimization and Reservoir Simulationmentioning

confidence: 99%

Comparison Different Techniques of Optimum Location for Infill Well Drilling

Al-adliy,

Al-mahdawi,

Mohammed

et al. 2024

IJCPE

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Increasing oil production from a reservoir can be achieved by decreasing the distance between the injector and the producer through a process known as infill drilling, which involves a pattern water flood. The main objective of this study is to provide a comprehensive overview of the optimal infill well location and the research and applications available to enhance the oil recovery factor, leading to increased economic profits. one effective empirical approach used in this study is based on decline curve analysis, which analyzes the production history of the well to determine the final economic recovery. Additionally, a numerical method that combines numerical simulation and optimization techniques has been proven to be successful in determining optimal infill drilling locations. The research results show that the volumetric computation of oil in place is a useful method for estimating the number of infill wells needed, but it does not consider heterogeneity and continuity. On the other hand, the numerical simulation and optimization techniques can quantify the remaining mobile oil post-infill drilling and establish optimal pattern configurations for maximum recovery at their centers.

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Section: Fig 2 Integration Between Optimization and Reservoir Simulationmentioning

confidence: 99%

Comparison Different Techniques of Optimum Location for Infill Well Drilling

Al-adliy,

Al-mahdawi,

Mohammed

et al. 2024

IJCPE

View full text Add to dashboard Cite

show abstract

“…Reservoir heterogeneity significantly affects both the oil production of a reservoir and the performance of injection wells in water flooding or miscible flooding projects [2,3]. However, so far few satisfactory techniques are available currently to characterize, quantify and predict the heterogeneity influence due to the complexity of an oil reservoir and the fluids in it [3].…”

Section: Introductionmentioning

confidence: 99%

Quantitative Models of Development Laws for Heterogeneous Sandstone Reservoirs by Water Flooding

Wang¹,

Liu²,

Wang³

2012

TOPEJ

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Abstract:The Lorenz curve is used to estimate the heterogeneity of an oil reservoir. The corresponding permeability distributions in a series of concept reservoir models with a uniform average permeability but different heterogeneities are obtained and characterized by inverse calculation of the Lorenz curve. Then the development laws of a reservoir in relation to its heterogeneity are studied in method of numerical simulation. The results show that reservoirs with a V k (permeability variation coefficient is defined in appendix) which characterizes the heterogeneity less than 0.2 have almost the same development rule. It is also found that the permeability profile is consistent with the water-cut profile in both positive and reverse rhythm reservoirs where injected water channels in high permeable layers. Furthermore, the water-cut profile of a reverse rhythm reservoir is more uniform than that of a positive rhythm reservoir. In addition, results also show an exponential relation between water-free recovery and variation coefficients in positive rhythm heterogeneous reservoirs. From the simulation results of reservoir models with different oil-water viscosity ratios, it is found that during the development process, the water-free recovery firstly decreases rapidly with an increasing oil/water viscosity ratio less than 30:1 before it decreases slightly. Besides, a modified logistic function is built to present the relation between ultimate recovery and variation coefficient for positive rhythm reservoirs. The ultimate recovery firstly decreases slightly before the permeability variation coefficient increases up to 0.4, and then decreases sharply. However, the inflexion of variation coefficient in a reverse rhythm one is 0.6. An algebraic equation is also built to describe the water cut change with the recovery factor of recoverable oil reserves. The water-free recovery is higher in a reverse rhythm reservoir than that in a positive rhythm reservoir especially in a reservoir with a relative small oil/water viscosity. However, the ultimate recovery of a reverse rhythm reservoir is higher than that of a positive rhythm reservoir. Also, during development process, the water-cut increases faster in a positive rhythm reservoir than in a reverse rhythm reservoir especially for medium heterogeneous reservoirs.

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Effect of Viscosity of Alkaline/Surfactant/Polymer on Enhanced Oil Recovery in Heterogeneous Sands

et al. 2013

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New development in technology and the rise in world oil prices give promises that substantial portion of otherwise neglected oil can be recovered. Reservoir heterogeneity significantly affects both the oil production and the performance of injection wells in water flooding or miscible flooding projects, thus the influence of heterogeneity on the oil exploitation process has been a concern in petroleum engineering. Numerous laboratory experimental studies and field tests on Alkaline/Surfactant/Polymer (ASP) flooding have been done. In this research, the relationship between the viscosity of an ASP solution and oil recovery in heterogeneous porous models were studied. Twenty-four ASP flood tests were conducted using artificial models. These models were made to have different permeability variation coefficients so that ASP floods in homogeneous and heterogeneous reservoir can be compared Local materials in place of industrial materials were used. Four ASP solutions were prepared and used in the ASP flood tests. The effect on tertiary oil recovery as viscosity increased was investigated. For heterogeneous models, it was found that increasing the ASP viscosity from 1.00cp to about 2.56cp increased and improved oil recovery. Further increase in viscosity to about 3.6cp had no much effect on recovery, because increasing the alkaline concentration reduced the visco-elastic effect of the viscosity of the solution.

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Characterization and Role of Reservoir Heterogeneity in Performance of Infill Wells in Water Flood and Miscible Projects

Cited by 3 publications

References 0 publications

Comparison Different Techniques of Optimum Location for Infill Well Drilling

Comparison Different Techniques of Optimum Location for Infill Well Drilling

Quantitative Models of Development Laws for Heterogeneous Sandstone Reservoirs by Water Flooding

Effect of Viscosity of Alkaline/Surfactant/Polymer on Enhanced Oil Recovery in Heterogeneous Sands

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