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- Empirical IPR Equations
- Extension of Darcy's Law
- Radial Flow
- Theoretical Pressure-Rate Relationship
- IPR Derived from Reservoir Simulation
- Effect of Depletion on IPR Formulas
- Effect of Stimulation and Damage on IPR Equations
- See Also
- External Links
Several IPR formulas have been developed to represent the inflow behavior of various types of wells. Matching a formula to multi-rate production data (Figure 2) allows determination of the value of the characteristic constants in the equations, which in turn characterize the productivity of the well. The empirical formulas are the primary tools to ...
Darcy's law, which was originally developed for water flow, has been extended to describe flow of hydrocarbon reservoirfluids (compressible and multiple phases). For single-phase oil flow, the proportional constant that relates flow rates to pressure differences in the original Darcy's law is broken down into two independent factors: rock permeabil...
Darcy's law can be applied to an ideal well model producing a constant steady-state production rate. The model assumes cylindrical flow in the reservoir where flow across the formation is horizontal and fluid moves radially toward the wellbore. It also assumes constant pay zone thickness, constant isotropic permeability, and an ideal liquid (homoge...
Darcy's law applied to the ideal well model gives an IPR equation expressed in terms of reservoir parameters. For undersaturated oil (a single-phase homogeneous liquid) in radial reservoir with no-flow outer boundaries, the following equation applies: 1. q o = k h ( p R − P w f ) 141.2 μ o B o [ ln ( r e / r w ) − 0.75 + s ] {\displaystyle q_{\rm...
For the particular case of a solution gas drive reservoir, there is an IPR formula derived by fitting an equation to the results from computer simulations performed for a wide variety of wells with a wide range of reservoir parameters. The formula given in normalized form is 1. q o q m a x = 1 − 0.2 ( p w f p R ) − 0.8 ( p w f p R ) 2 {\displaystyl...
Depletion usually results in deterioration of the IPR (Figure 6). These changes can be predicted quantitatively by calculating the changes of the characteristic constants: j, c, qax A, and B. The exponent n does not change with depletion. If subscript p denotes the present depletion state and subscript fa future state, the present and future charac...
Stimulating a well and reducing its skin factor improve the IPR of a well (Figure 7). Using the subscript 1 to denote a prestimulation or preservice state and the subscript 2 to denote a new post-treatment state, we see the characteristic parameters in IPR equation change with changing skin factor as follows: Undersaturated oil reservoirs: 1. J 2 J...
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Pleasanton, Texas 78064. United States. Call 24/7: 833-759-3557. About. Careers. Equipment. Contact Us. Website by Sovic Creative. With over 50+ years of combined oilfield management experience, Straitline Water Transfer can tackle your toughest challenges. We offer solutions for all phases - drilling, completions, production, and midstream ...
Sep 14, 2015 · The best-fit straight line yielded a slope of 0.0004 psia/(STB/D) 2, which is the turbulence coefficient b. The intercept is the laminar flow coefficient and is determined to be 0.23 psia/STB/D. These values are used in Eq. 5 to determine the maximum oil production rate of 1,814 STB/D when the flowing bottomhole pressure is 0 psig.
The Ohio Department of Natural Resources, Division of Oil & Gas Resources provides an interactive map of the location, status, and type of oil and gas wells across the state of Ohio. The map also includes information on oil and gas fields, groundwater protection, and flood risk (100-year floodplain).
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