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Brooks-Corey MICP Model Parameters Determination
2016 Student Paper Contest | 30 January 2016 Texas A&M University | College Station, TX Brooks-Corey MICP Model Parameters Determination Department of Petroleum Engineering Texas A&M University College Station, TX (USA) Sarin Apisaksirikul 2016 Student Paper Contest | 30 January 2016 Texas A&M University | College Station, TX Brooks-Corey MICP Model Parameters Determination Sarin APISAKSIRIKUL
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Outline Capillary Pressure Thomeer MICP Model Brooks-Corey MICP Model
Swanson Correlation Equivalence of Brooks-Corey and Thomeer-Swanson Models Method to Determine Brooks-Corey MICP Model Parameters Examples Discussion Conclusion 2016 Student Paper Contest | 30 January 2016 Texas A&M University | College Station, TX Brooks-Corey MICP Model Parameters Determination Sarin APISAKSIRIKUL
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Capillary Pressure Cite Referencesβ¦
2016 Student Paper Contest | 30 January 2016 Texas A&M University | College Station, TX Brooks-Corey MICP Model Parameters Determination Sarin APISAKSIRIKUL
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Capillary Pressure ALWAYS use Equation Editor 3. π π = 2ππππ π π
Washburn (1921): Leverett (1940): π½( π π€ )= π π ππππ π π/π π=10.66 (ππππ π) 2 πΉπ π π 2 π π π€ Purcell (1949): π= π π π€π 2 Timur (1968): Winland (1980): log π
35 =0.732 +0.588logπ β0.864logπ π= π π π π π΄ 1.691 Swanson (1981): π=226 π π 2 πΉ Katz&Thompson (1986): 2016 Student Paper Contest | 30 January 2016 Texas A&M University | College Station, TX Brooks-Corey MICP Model Parameters Determination Sarin APISAKSIRIKUL
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Thomeer MICP Model (1960) πΊ π πΊ πβ =ππ±π© β π π π₯π§ π π π π
ALWAYS use Equation Editor 3. πΊ π πΊ πβ =ππ±π© β π π π₯π§ π π π π
Fg = Pore geometrical factor pc = Capillary pressure pd = Minimum "threshold" pressure at which a continuous phase exists in a porous medium Sb = Percent bulk volume occupied by mercury at a given capillary pressure Sbβ mercury at infinite capillary Cite Referencesβ¦ 2016 Student Paper Contest | 30 January 2016 Texas A&M University | College Station, TX Brooks-Corey MICP Model Parameters Determination Sarin APISAKSIRIKUL
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Brooks-Corey MICP Model (1964)
Cite Referencesβ¦ ALWAYS use Equation Editor 3. l = Pore-size distribution index. Sw* = Effective saturation function. Sw = Wetting phase saturation. Swi = Irreducible wetting phase saturation. pc = Capillary pressure. pd = Minimum "threshold" pressure at which a continuous phase exists in a porous medium. π π = π π
( πΊ π β ) βπ/π πΊ π β = πΊ π β πΊ ππ πβ πΊ ππ 2016 Student Paper Contest | 30 January 2016 Texas A&M University | College Station, TX Brooks-Corey MICP Model Parameters Determination Sarin APISAKSIRIKUL
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Swanson Correlation (1981)
Cite Referencesβ¦ Follow same guidance on x-axis and y-axis as in thesis. ALWAYS use Equation Editor 3. π π =πππ πΊ π π π π¨ π.πππ Air permeability π π =πππ πΊ π π π π¨ π.πππ Brine permeability 2016 Student Paper Contest | 30 January 2016 Texas A&M University | College Station, TX Brooks-Corey MICP Model Parameters Determination Sarin APISAKSIRIKUL
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Equivalence of Brooks-Corey and Thomeer-Swanson Models
Brooks-Corey Model Thomeer-Swanson Model π π = π π
( πΊ π β ) βπ/π Follow same guidance on x-axis and y-axis as in thesis. π π = π π
πβ πΊ π πβ πΊ ππ βπ/π π βπ/π ALWAYS use Equation Editor 3. πΊ π π π = π βπ/π π π
πβ πΊ π πβ πΊ ππ βπ/π πΊ π πΊ π π π π¨ = π
π
πΊ π πΊ π π π =π 2016 Student Paper Contest | 30 January 2016 Texas A&M University | College Station, TX Brooks-Corey MICP Model Parameters Determination Sarin APISAKSIRIKUL
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Equivalence of Brooks-Corey and Thomeer-Swanson Models
ALWAYS use Equation Editor 3. πΊ π π π π¨ =πππ π π π
π π+π (π+ π π ) (πβ πΊ ππ )π ( πΊ π ) π¨ =ππππ(πβ πΊ ππ ) π π+π πΊ ππ =πβ ( πΊ π ) π¨ ππππ π+π π ( π π ) π¨ = π π
π π+π βπ/π π= π π + π π π π« + π π π π« π + π π π π« π + π π π π« π π
π + π
π π π« + π
π π π« π + π
π π π« π + π
π π π« π Coefficient Optimized Value n1 d1 n2 d2 n3 d3 n4 d4 n5 d5 π π« = πβ ( π π ) π¨ π π
πβπ 2016 Student Paper Contest | 30 January 2016 Texas A&M University | College Station, TX Brooks-Corey MICP Model Parameters Determination Sarin APISAKSIRIKUL
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Proposed Method pd Estimate pd using a semi-log plot of pc vs. Sw by extrapolation of the pc plateau trend to Sw = 1. Calculate for [Sb/pc] for the data set. Plot [Sb/pc] versus Sb on a Cartesian plot. Estimate (Sb)A from the Cartesian plot in Step 3 where the [Sb/pc] trend has a maximum (i.e., [Sb/pc]A). Calculate for (pc)A from [Sb/pc]A obtained in step 4 using the point (Sb)A. Solve for l from (pc)A obtained in Step 5 and pd obtained in Step 1. Solve for Swi from l obtained in Step 6. Follow same guidance on x-axis and y-axis as in thesis. (Sb/pc)A (Sb)A Follow same guidance on x-axis and y-axis as in thesis. 2016 Student Paper Contest | 30 January 2016 Texas A&M University | College Station, TX Brooks-Corey MICP Model Parameters Determination Sarin APISAKSIRIKUL
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Example 1 Sample #71 High quality MICP data set.
pd and the Swanson Apex (Sb/pc)A can easily be identified. Both models capture the trend of the MICP data. Follow same guidance on x-axis and y-axis as in thesis. Follow same guidance on x-axis and y-axis as in thesis. 2016 Student Paper Contest | 30 January 2016 Texas A&M University | College Station, TX Brooks-Corey MICP Model Parameters Determination Sarin APISAKSIRIKUL
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Example 2 Sample #132 High quality MICP data set.
pd and the Swanson Apex (Sb/pc)A can easily be identified. The MICP data does not match the Brooks-Corey model at low Sw. Follow same guidance on x-axis and y-axis as in thesis. Follow same guidance on x-axis and y-axis as in thesis. 2016 Student Paper Contest | 30 January 2016 Texas A&M University | College Station, TX Brooks-Corey MICP Model Parameters Determination Sarin APISAKSIRIKUL
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Discussion This method allows the determination of Swi and l directly from the clearly defined parameters such as pd and (Sb/pc)A. This method facilitates Brooks-Corey model matching over the use of regression. Many samples have MICP data deviated from Brooks-Corey model, especially at low Sw. This method helps identify if the MICP data follow Brooks-Corey model or not. Theoretically, l can be ranged from 0 to infinity. Our study found that l is never higher than 10 and unlikely to be higher than 5. We need to work on these β¦ I would like to limit 1 line/bullet. We need to work on grammar and structure of words. 2016 Student Paper Contest | 30 January 2016 Texas A&M University | College Station, TX Brooks-Corey MICP Model Parameters Determination Sarin APISAKSIRIKUL
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Conclusion Capillary pressure critically affects reservoir initial fluid distribution and hydrocarbon recovery during primary or enhanced production. Relationship between capillary pressure, saturation, rock properties (porosity, permeability) exists. Brooks-Corey MICP model is widely accepted model to relate capillary pressure and wetting phase saturation. Brooks-Corey MICP model parameters are obtained by model matching using regression. Time consuming Subjective, many possible realizations Our proposed method facilitates the Brooks-Corey MICP model parameters determination. Direct calculation from the well defined parameters of displacement pressure and Swanson Apex. We need to work on these β¦ I would like to limit 1 line/bullet. We need to work on grammar and structure of words. 2015 Student Paper Contest | 31 January 2015 Texas A&M University | College Station, TX Complexity of Permeability Determination in Shale Gas Reservoirs Sarin APISAKSIRIKUL
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Brooks-Corey MICP Model Parameters Determination
2016 Student Paper Contest | 30 January 2016 Texas A&M University | College Station, TX Brooks-Corey MICP Model Parameters Determination Department of Petroleum Engineering Texas A&M University College Station, TX (USA) Sarin Apisaksirikul 2016 Student Paper Contest | 30 January 2016 Texas A&M University | College Station, TX Brooks-Corey MICP Model Parameters Determination Sarin APISAKSIRIKUL
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References Huet, C. C Semi-Analytical Estimates of Permeability Obtained from Capillary Pressure. MS thesis, Texas A&M University, College Station, Texas (December 2005). Wu, T Permeability Prediction and Drainage Capillary Pressure Simulation in Sandstone Reservoirs. Dissertation, Texas A&M University, College Station, Texas (December 2004). Thomeer, J.H.M Introduction of a Pore Geometrical Factor Defined by the Capillary Pressure Curve. JPT 12(3): doi: /1324-G. Brooks, R.H., Corey, A. T Hydraulic Properties of Porous Media 3(3), Colorado State University Hydrology Papers. Swanson, B. F A Simple Correlation Between Permeabilities and Mercury Capillary Pressures. Journal of Petroleum Technology 33 (12): doi: /8234-PA. Comisky, J. T., Newsham, K., Rushing, J. A. et al A Comparative Study of Capillary-Pressure-Based Empirical Models for Estimating Absolute Permeability in Tight Gas Sands. Presented at the SPE Annual Technical Conference and Exhibition, Anaheim, California, U.S.A., November. SPE MS. doi: / MS. Rezaee, R., Saeedi, A., Clennell, Ben Tight Gas Sands Permeability Estimation From Mercury Injection Capillary Pressure and Nuclear Magnetic Resonance Data. Journal of Petroleum Science and Engineering : doi: /j.petrol Blasingame, T.A.: βPetrophysics Lecture 4 β Capillary Pressure, β Petroleum Engineering 620 Course Notes, Texas A&M University (2014). Leverett, M Capillary behavior in porous solids. Transactions of the AIME (01): 2016 Student Paper Contest | 30 January 2016 Texas A&M University | College Station, TX Brooks-Corey MICP Model Parameters Determination Sarin APISAKSIRIKUL
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Derivation of the relationship between Swansonβs parameter and the Brooks-Corey model parameters
2016 Student Paper Contest | 30 January 2016 Texas A&M University | College Station, TX Brooks-Corey MICP Model Parameters Determination Sarin APISAKSIRIKUL
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Derivation of the relationship between Swansonβs parameter and the Brooks-Corey model parameters
2016 Student Paper Contest | 30 January 2016 Texas A&M University | College Station, TX Brooks-Corey MICP Model Parameters Determination Sarin APISAKSIRIKUL
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Derivation of the relationship between Swansonβs parameter and the Brooks-Corey model parameters
2016 Student Paper Contest | 30 January 2016 Texas A&M University | College Station, TX Brooks-Corey MICP Model Parameters Determination Sarin APISAKSIRIKUL
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Derivation of the relationship between Swansonβs parameter and the Brooks-Corey model parameters
2016 Student Paper Contest | 30 January 2016 Texas A&M University | College Station, TX Brooks-Corey MICP Model Parameters Determination Sarin APISAKSIRIKUL
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Derivation of the relationship between Swansonβs parameter and the Brooks-Corey model parameters
2016 Student Paper Contest | 30 January 2016 Texas A&M University | College Station, TX Brooks-Corey MICP Model Parameters Determination Sarin APISAKSIRIKUL
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Derivation of the relationship between Swansonβs parameter and the Brooks-Corey model parameters
2016 Student Paper Contest | 30 January 2016 Texas A&M University | College Station, TX Brooks-Corey MICP Model Parameters Determination Sarin APISAKSIRIKUL
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Estimation Function for Pore-Size Distribution Index (l)
Eq. D6: Eq. D7: 2016 Student Paper Contest | 30 January 2016 Texas A&M University | College Station, TX Brooks-Corey MICP Model Parameters Determination Sarin APISAKSIRIKUL
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Brooks-Corey Log-log Plot of Sample #71 and #132
2016 Student Paper Contest | 30 January 2016 Texas A&M University | College Station, TX Brooks-Corey MICP Model Parameters Determination Sarin APISAKSIRIKUL
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