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Areal displacement in a waterflood

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Proceedings Papers

Paper presented at the SPE Western Regional Meeting, March 26–30, 2001
Paper Number: SPE-68806-MS
.... Laboratory data is important to know the range of the displacement efficiency, and as pointed out by Dake 2 , waterflooding is conducted on hillsides, not at a pore scale level. The volumetric sweep efficiency is commonly estimated by the product of vertical sweep efficiency and areal sweep efficiency. Both...
Proceedings Papers

Paper presented at the SPE Latin America and Caribbean Petroleum Engineering Conference, May 17–19, 2017
Paper Number: SPE-185535-MS
..., is discussed by Perez et al. (2017) . Areal sweep efficiency η a is also highly improved by polymer injection which is very sensitive to cell size. In fact, in order to obtain a representative measurement of η a improvement by polymer injection, we need to consider firstly the displacement front...
Proceedings Papers

Paper presented at the Petroleum Industry Application of Microcomputers, June 23–26, 1987
Paper Number: SPE-16489-MS
... impact. Introduction Waterflood prediction techniques may be categorized into five main groups: reservoir heterogegeity techniques, areal sweep methods, displacement process models, numerical methods, and empirical models. The first three types of techniques were conceived before computers were widely...
Proceedings Papers

Paper presented at the SPE/DOE Symposium on Improved Oil Recovery, April 22–26, 2006
Paper Number: SPE-99569-MS
... at lower HPV of water injected. Specifically, the ultimate 3D efficiency of 1.6 occurs at 0.31 HPV of water injected for 3D compared to 0.46 for 2D. We define areal sweep in 3D as the area swept by water that has (on average) the same waterflood displacement efficiency as 2D, i.e. HPV water injected in 3D...
Proceedings Papers

Paper presented at the Middle East Oil Show and Conference, March 15–18, 1997
Paper Number: SPE-37696-MS
... permeability characteristics of the rock as well as the viscosities of the displacing and displaced fluids. The extend to which a reservoir is swept by a displacing fluid is separated into areal and vertical sweep efficiencies. The areal sweep efficiency accounts for the nonlinearity of the flow patterns...
Journal Articles
J Can Pet Technol 45 (07).
Paper Number: PETSOC-06-07-04
Published: 01 July 2006
... for infill horizontal and vertical wells placed in these projects during the past 15 years. Introduction In waterflood recovery projects, recovery at any point in time is a product of displacement efficiency, conformance (vertical sweep efficiency), and areal sweep efficiency. Whereas conformance can...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, September 26–28, 2016
Paper Number: SPE-184503-STU
... for improvement. Laboratory core floods essentially measure displacement efficiency, which is 52 to 63% in this case. Field recovery efficiency will be reduced by areal and vertical sweep efficiencies. However, in Figure 11 , laboratory flood recovery from the well #14 core are plotted against waterflood results...
Journal Articles
SPE J. 8 (01): 52–62.
Paper Number: SPE-1849-PA
Published: 01 March 1968
... displacement sweep efficiency enhanced recovery areal sweep efficiency viscosity chemical flooding methods breakthrough mobility ratio displacing fluid polymer solution waterflooding hele-shaw model connate water bank porous media flood water equation injection Areal Sweep Efficiency...
Proceedings Papers

Paper presented at the SPE Middle East Oil and Gas Show and Conference, March 18–21, 2019
Paper Number: SPE-194767-MS
... Abstract The recovery from fractured reservoirs is usually low. The areal heterogeneity is one result of the fractured reservoir. Low salinity waterflooding (LSWF) and preformed particle gel (PPG) have recently drawn great interest from the oil industry. LSWF can only increase displacement...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 9–12, 2005
Paper Number: SPE-97198-MS
... in a quarter 5-spot model was studied by Habermann[8] and Mahaffey et al.[9] As the mobility ratio increases, the areal sweep efficiency decreases. Effect of mobility ratio on immiscible displacement areal sweep efficiency have been studied by others.[10] Recently, Cinar et al.[11] have studied areal...
Proceedings Papers

Paper presented at the International Petroleum Exhibition and Technical Symposium, March 17–24, 1982
Paper Number: SPE-10024-MS
... DISPLACEMENT, AREAL AND VERTICAL SWEEP EFFICIENCIES The fraction of oil that will be removed by waterflooding is a function of the following efficiency factors: 1. Areal sweep efficiency, Ea 2. Invasion or vertical sweep efficiency, Ei Unit displacement efficiency, Ed Figure 6 depicts these three efficiencies...
Proceedings Papers

Paper presented at the International Meeting on Petroleum Engineering, November 1–4, 1988
Paper Number: SPE-17609-MS
.... The impact fractures have on sweep increases as the mobility ratio increases. As a result, fractures which do not have a significant impact on waterflood sweep can have a signif- icant effect on sweep in an adverse mobility ratio displacement. 3. Areal sweep efficiency is affected by which well or wells...
Proceedings Papers

Paper presented at the Latin American and Caribbean Petroleum Engineering Conference, May 31–June 30, 2009
Paper Number: SPE-123087-MS
... under waterflood or with active aquifers. This causes a triple hit on the recovery factor: Poor displacement efficiency Poor areal sweep Poor vertical sweep This is made worse by reservoir heterogeneity. The commonly used concepts of productivity index (PI) and injectivity index (II...
Proceedings Papers

Paper presented at the SPE Oil and Gas India Conference and Exhibition, April 4–6, 2017
Paper Number: SPE-185412-MS
... enhancement of areal sweep and distribution of injection pattern using horizontal injectors. Studies indicate that an effective waterflood leads to additional oil recovery and improved reservoir pressure. Oil recovery envisaged before and after initiation of waterflood was established for Block-I& II...
Proceedings Papers

Paper presented at the SPE Latin America/Caribbean Petroleum Engineering Conference, April 23–26, 1996
Paper Number: SPE-36133-MS
... resulting in low areal sweep efficiency. Due to the lower mobility of water, when compared with oil mobility, the injected gas cannot displace oil from the low permeable zones which have not been swept during the waterflooding. The displaced oil forms a high viscosity bank in front of the injected gas...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 4–7, 1981
Paper Number: SPE-10113-MS
... is an extension and generalisation of the 'stream tube-model. It assumes the flow and saturation distribution In the areal plane to be give by a known simple fluid-fluid displacement in which displacing and displaced fluid are separated by a sharp interface. The mobility ratio of this sharp-interface pattern...
Journal Articles
J Can Pet Technol 24 (06).
Paper Number: PETSOC-85-06-06
Published: 01 November 1985
... expected recovery from a waterflood is as follows. Recoverable Oil = OOIP x Ev x EAXED (1) he Ev = Vertical Sweep Efficiency EA = Areal Sweep Efficiency ED = Displacement Sweep Efficiency OOIP = Original Oil in Place Since EA is the factor that this analysis is trying to determine, the other factors, E,, E...
Journal Articles
J Pet Technol 23 (07): 805–813.
Paper Number: SPE-2929-PA
Published: 01 July 1971
... the vertical efficiency, is usually combined with a method for approximating areal sweep. Experience has shown that such a model can successfully simulate and predict the performance of pattern waterfloods. However, such a model may not be applicable when the well patterns are not uniform or when...
Proceedings Papers

Paper presented at the International Petroleum Technology Conference, November 14–16, 2016
Paper Number: IPTC-18834-MS
... maturity. The recovery factor (Er) is the product of microscopic (Ed), areal (Ea), and vertical (Ev) displacement efficiency as shown in Eq. (1). The available special core analysis (SCAL) data are a main input into the calculation of microscopic displacement efficiency, while the areal and vertical...
Proceedings Papers

Paper presented at the Latin American and Caribbean Petroleum Engineering Conference, May 31–June 30, 2009
Paper Number: SPE-121854-MS
... - Infantas field had in 2006, 107 producers and 21 injectors active wells and has been waterflooded since 1957. This paper illustrate the methodology used and the results obtained in the estimation of the areal and vertical efficiencies of the waterflooding process using the analytical method of Craig...

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