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The above equation gives the mapping between the elevation and the capillary pressure. The capillary pressure is proportional to the elevation above the free water level and the constant of proportionality is the product of the density difference and the acceleration due to gravity. In this study, eight permeability models are calibrated to a large mercury injection capillary pressure dataset obtained fromtheMiddleEastregion.Thepermeabilitymodelsare:Purcell,Thomeer,Winland Current Filters. entry pressure Feature 2017-04-26 · The Thomeer function has three parameters: the threshold pressure P ct, the pore geometric factor G, and the mercury saturation at infinite capillary pressure S Hg∞. (Thomeer wrote Eq. 15.8 with bulk mercury saturation instead of mercury saturation. In this paper, we developed a novel methodology, based on Thomeer formalism and optimization techniques, for capillary pressure estimation using “standard” log data. With this methodology, capillary pressure will cover a larger volume of the reservoir than the volume covered by the SCAL.

24) gives a good correlation, when using (Fg), that derived from the type curve. Using (Fg) derived from Wu (2004) method, the relation is improved considerably and recorded the highest correlation among the used models (Table 3). The Thomeer hyperbolas so determined are converted to capillary pressure curves. Continuous capillary pressure (P c ) curves of subsurface rock formations adjacent wells are determined based on translation relaxation time (T 2 ) data from nuclear magnetic resonance (NMR) and from wireline well logs, such as resistivity logs, to obtain water saturation (S w ) of the rock in the formations.

Referenser kapitel 1 12 - 1Library

The technique is based on the observation that the location and shape of a capillary pressure curve reflect characteristics of the pore structure of the sample. level is defined as the elevation where the capillary pressure is zero. The above equation gives the mapping between the elevation and the capillary pressure.

Referenser kapitel 1 12 - 1Library

The Brooks-Corey capillary pressure model has been accepted widely in the petroleum and other industries. However the Brooks-Corey model cannot represent capillary pressure curves of some rock samples such as those from The Geysers geothermal field. In fact, few existing capillary pressure models work for these rock samples. Mohamed S. El Sharawy 60 Thomeer (1983) model (Eq.

OnePetro (39) Subsequently, Chapter 4 opens with theory related to capillary pressure and capillary pressure measurements. It also describes capillary pressure models and porosity-permeability models. In Chapter 5, the MICP parametrization workflow used in this thesis is described.
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The resulting fitting parameters (displacement pressure, pore geometric factor, Bulk volume occupied at infinitive pressure) can be used to characterize the pore structure and to build a saturation model. For more information: J. H. M. Thomeer, “Introduction of a Pore Geometrical Factor Defined by a Capillary Pressure Curve,” Transaction of AIME, Vol. 219, No. 2057, 1960, pp. 354-358. 2016-09-07 2011-09-01 Thomeer (1960) developed a method for the analysis of mercury injection capillary pressure (MICP) data, which was used primarily within Shell (Thomeer, 1983; Smith, 1992; Hawkins et al., 1993). He observed that the data from the MICP experiment, for simple rock types, could be represented by a hyperbola when plotted on Log-Log graph paper.

Capillary curves are a set of function of Based on previous research data on the mercury injection capillary pressure ( MICP) for two groups of core plugs excised, several permeability prediction models This function takes into consideration the capillary pressure model and in the Techlog modelling process: Brooks-Corey Lambda Thomeer J Leverett with As computation of water saturation from capillary pressure model) is Thomeer function to obtain mathematical model of water saturation from capillary pressure. penetrometer (a capillary) to intrude the sample, for each pressure.
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Referenser kapitel 1 12 - 1Library

Capillary pressure (P c) is the difference in pressure measured across the interface in the capillary (P c = P nw - P w). This pressure results from the contrast in pressure gradients caused by the different densities of the nonwetting ( ρ nw ) and wetting ( ρ w ) phases (right).

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Referenser kapitel 1 12 - 1Library

Data Interpretation Thomeer Curve Fitting: Rock Typing • Thomeer model is extensively used to fit the Pc curves (hyperbolic function) for saturation height modelling and rock typing • Fitted curves are defined by the pore structure factor (G), threshold pressure (Pd) and the total interconnected pore volume (Sb∞) (Bulk Volume saturation at infinite pressure ~ Porosity) • LR-Senergy Chapter 6 - Common Applications (Thomeer and Leverett J) Workshop. Chapter 7 - Introduction to Petrophysical Rock Types. Workshop. Day 4 will cover show how to convert lab measured capillary pressure data to reservoir conditions to determine height above free water, seal capacity and initial water saturation. The inputs to the models are air porosity, grain density, and Thomeer parameters obtained using mercury injection capillary pressure profiles.