It is usually suggested that thermal cracking in a quartz-bearing rock results from the anomalously high volumetric expansion coefficients of quartz (e.g. Simmons & Cooper 1978). has also been recognized mismatch and mineral anisotropy contribute to materials consist polycrystalline aggregate composed several anisotropic minerals even absence temperature gradient (Friedrich Wong 1986). Experiments investigating rocks commonly involve imaging quantitative stereology crack populations induced...

Although P‐ and S‐wave dispersion is known to be important in porous/cracked rocks, theoretical predictions of such dispersions have never been given. We report calculations show that the predicted are high case low aspect ratio cracks [Formula: see text] or crack density text]. Our derived from first‐principle computations high‐ low‐frequency elastic moduli a rock permeated by an isotropic distribution pores cracks, dry saturated, with idealized geometry (spheres ellipsoids). Henyey...

The increasing oil demand and the significant amount of heavy oil/bitumen reserves will motivate a huge effort on development reservoirs in next decades. Within this framework, Steam Assisted Gravity Drainage (SAGD) is very promising technique to produce from thick high permeability reservoirs. small scale field tests conducted up now highlighted influence heterogeneities steam chamber involved SAGD. This work presents numerical investigation effects heterogeneity SAGD performance when...

Given the significant global warming power and short atmospheric lifetime of methane, one most effective mitigation strategies for limiting over term is to target anthropogenic sources methane rapidly reduce their emissions. Tracking gas network input output data shows that more natural enters transmission distribution networks than leaves: this difference called unaccounted-for gas. The aim article investigate possibility leaks along quantify them. These amount emissions since mainly...

Abstract Reservoir management for hydrocarbon extraction and repositories design radioactive waste storage are two different areas in which rock physics geomechanics provide valuable information. Although the targets objectives different, similar approaches common attributes exist both fields: safety assessment, short- to long-term prediction, integration of various scales investigation, remote monitoring, among others. Nevertheless, there also important differences: reservoirs at depth...

An effective medium approach (differential self‐consistent scheme) has been used to calculate elastic wave velocities in rocks containing spherical pores and ellipsoidal cracks with two fluid phases. The results are applied the case of imbibition/drainage processes performed laboratory (at high frequencies). For that purpose, scales heterogeneities accounted for. first one corresponds size or cracks. It is scale a dispersion mechanism termed “local flow” because it depends on local...

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Many geophysical studies in reservoir characterization focus on the variations elastic properties of rocks. They commonly involve seismic data, which are processed terms attributes. These data still have to be related physical rock mass and fluids saturating pore space. This need motivated development research projects based upon effective medium theory (EMT). We used EMT infer porosity also fracture from impedances part Fort Worth Basin, Texas. The main idea was take advantage available...

Summary Our purpose is to evaluate the benefit of using time-lapse seismic in addition production history for reservoir characterization. A new inversion methodology, based on gradual deformation method (GDM), has been developed simultaneously integrate different sources information like 4D-seismic-related data and data. This methodology was validated successfully a geologically realistic 3D synthetic model. An optimization procedure identify models consistent both with an initial 8-year...

Abstract This paper shows the results of an assisted history-matching process applied to a North Sea field case operated by Statoil. The dynamic data considered, that is varying with fluid flow, are both production and 4D-seismic related data. entails geology fluid-flow simulation workflow, including population geological model facies petrophysical properties using geostatistical algorithms, saturation pressure changes in reservoir computation time-lapse seismic attributes. workflow also...

Reservoir models are used for predicting future oil recovery or evaluating alternative field management scenarios. They can be considered as reliable when they account all available data collected on the field: split into static such logs measurements carried out cores extracted from wells and dynamic pressures flow rates. Since late nineties, latter also consist of 4D seismic data. This motivated development very specific workflows, which yield reservoir respecting In this paper, we focus...

Recently, we proposed the gradual deformation approach for constraining stochastic models to dynamic data (well-tests and production history). In this paper, review basic algorithm extend its application different types of truncated Gaussian simulations (including non stationary pluri-Gaussian simulations). A case study on calibration a reservoir lithofacies model well-test pressure illustrates efficiency approach.