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2022 | Buch

Experimental Mechanics of Fractured Porous Rocks


Über dieses Buch

The book offers novel petrophysical methods for obtaining and characterizing physical properties of sandstone and fractured carbonate rocks. The proposed experimental petrophysical test for the determination of permeability tensor ellipses in fractured rocks at a laboratory scale is a methodology of easy application and does not require complicated equipment. Such a test can be extended with 3D digital petrophysics. The estimation of principal permeability directions is useful in the realization of immiscible or miscible displacements in the rock.

This book is of interest for professionals and researchers in the field of petrophysics and oil and gas exploration.


Chapter 1. Petrophysics or Geomechanics: A Branch of Mechanics
This book presents new petrophysical methods for obtaining and characterizing the physical properties of fractured carbonate and sandstone rocks. The experimental design of models for laboratory-scale representation of naturally fractured reservoirs predicts the properties and flow behavior of fluids at the reservoir scale, which develops over several years.
Daniel Cabrera S., Fernando Samaniego V.
Chapter 2. Petrophysical Classification of Rocks
This chapter presents a classification of rocks, for developing conventional and special petrophysics experimental studies. The presented classification can be extended to a reservoir classification, which coincides with other classifications in the literature. The reported values of compressibility range are hard data for numerical reservoir simulation and rock mechanics studies.
Daniel Cabrera S., Fernando Samaniego V.
Chapter 3. Experimental Permeability Tensor for Fractured Porous Rocks
This chapter presents a novel petrophysical experiment for measuring the 3D permeability tensor at reservoir conditions in a fractured porous rock. The permeability variation with confining pressure is demonstrated through the experimental investigation; the permeability ellipses plots show the decrease of permeability, as a function of the increase in effective stress. The experiment was developed at reservoir conditions in a full diameter rock sample, from the Gulf of Mexico naturally fractured reservoir. The analysis of the laboratory data reveals the elliptical behavior of permeability. The experimental data provide a basis for improving reservoir simulation models, in order to obtain realistic predictions of reservoir behavior.
Daniel Cabrera S., Fernando Samaniego V.
Chapter 4. Scaling Experimental Immiscible Flow and Geomechanics in Fractured Porous Rock
An experimental coreflooding test was planned to determine residual oil saturation in a double porosity rock (vuggy-fracture network, and matrix). Oil-water contact advance, produced by reservoir production, was scaled by dimensional analysis and experimentally performed in the laboratory, in order to calculate residual oil saturation in the region invaded by water in a giant naturally fractured reservoir in the Gulf of Mexico. A fractured rock (full diameter) and dead oil were used for the experimental simulation of aquifer advance. Displacements were performed at reservoir conditions of high pressure and temperature (effective stress range 2000 psi < p < 7000 psi and 120 °C). The coreflooding was carried out in two phases, an effective stress phase in which the oil contained in the double porosity system was displaced, fractures are open and represent the preferential fluid flow paths in the rock. Phase 1 ends when only flow of water is recovered. In combination with effective porosity data, it was possible to estimate the remaining oil saturation in the double porosity. The second phase corresponds to the continuation of the coreflooding with high effective stress where the rock has primary porosity (pseudo-matrix) characteristics.
Daniel Cabrera S., Fernando Samaniego V.
Chapter 5. General Conclusions
This book presents the design of advanced experimental petrophysical tests, to investigate the constitutive behavior of fractured rocks; the tests, and the data presented have been performed under reservoir conditions. The most relevant technical aspects discovered from the experiments are resumed.
Daniel Cabrera S., Fernando Samaniego V.
Experimental Mechanics of Fractured Porous Rocks
verfasst von
Daniel Cabrera S.
Fernando Samaniego V.
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