\begin{tabular}{lcc} (i) You are currently in read-only mode. After signing in, you can create, edit, and share documents. & Sign in \\ Encroachment angle & - & \( 180^{\circ} \) \\ Radius, ft & 4000 & 80,000 \\ Flow regime & semisteady-state & unsteady-state \\ Porosity & - & 0.20 \\ Thickness, ft & 200 & 30 \\ Permeability, md & 1.2 & 50 \\ Viscosity, cp & 3800 & 0.36 \\ Original pressure & 3600 & 3800 \\ Current pressure & 1.300 & - \\ Original volume factor & 1.303 & 1.04 \\ Current volume factor & 3000 & 1.04 \\ Bubble-point pressure & & - \\ \hline \end{tabular} The field has been on production for 1120 days and has produced 800,000 STB of oil and 60,000 STB of water. Water and formation compressibilities are estimated to \( 3 \times 10^{-6} \) and \( 3.5 \times 10^{-6} \mathrm{psi}^{-1} \), respectively. Calculate the original oil in place.
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The reservoir volume can be calculated using the formula: V = π * h * r^2 where h is the thickness of the reservoir and r is the radius of the reservoir. For the semisteady-state regime, the thickness is 200 ft and the radius is 4000 ft. So, the reservoir Show more…
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Given the following data on an oil reservoir: Aquifer Geometry Encroachment angle Radius, ft Flow regime Porosity Thickness, ft Permeability, md Viscosity, cp Original pressure Current pressure Original volume factor Current volume factor Bubble-point pressure circle semi-circle 180 80,000 unsteady-state 0.20 30 50 0.36 3800 4000 semi-steady-state 200 1.2 3800 3600 1.300 1.303 3000 1.04 1.04 The field has been on production for 1120 days and has produced 800,000 STB of oil and 60,000 STB of water. Water and formation compressibilities are estimated to be 3 x 10-6 and 3.5 x 10-6 psi-1, respectively. Calculate the original oil-in-place.
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Example 3-1: A 5000 ft x 1200 ft x 75 ft horizontal reservoir contains oil that flows along its length. The reservoir rock porosity and permeability are 0.18 and 15 md, respectively. The oil FVF and viscosity are 1 RB/STB and 10 cp, respectively. The reservoir has a well located at 3500 ft from the reservoir left boundary and produces oil at a rate of 150 STB/D. Discretize the reservoir into five equal blocks using a block-centered grid and assign properties to the gridblocks comprising this reservoir. Solution 1- Using a block-centered grid, the reservoir is divided along its length into ______ equal blocks 2- N = 3- Δx = 4- Gridblocks i = 5- Each gridblock has the dimensions of Δy = ______ and Δz = ______ and 6- Properties of kx = ______ and φ = 7- The flow area of each grid block are equal and located halfway between the gridblock points: for example area between grid block 1 and 2 is A1+1/2 and that between 3 and 4 is A3+1/2 and each Ai+1/2 = 8- gridblock 4 hosts a well with qsc = 9- Fluid properties are B = ______ and μ =
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