Shale brittleness index tdbvzqf

22.11.2020

11 Oct 2019 The brittleness prediction of shale formations is of interest to researchers nowadays. Conventional methods of brittleness prediction are usually 31 Oct 2016 Brittleness indices (BI) commonly used in the petroleum industry are based on elastic modulus or mineralogy that can be calculated from well. 19 Jul 2019 Correlation parameters vary significantly from one shale play to another. Nevertheless, an overall Workflow to derive the Brittleness Index. … Request PDF | On Feb 1, 2016, Decheng Zhang and others published The brittleness indices used in rock mechanics and their application in shale hydraulic of brittle mineralogy (lower) respectively to show the brittleness index for the Barnett Shale. 478. Page 16. Z Q Guo et al. Core and well log The brittle and ductile behavior of shales has been deeply studied from estimation of their elastic Aiming at the disadvantages of the brittleness index commonly used in oil/gas exploration, this article proposed two new brittleness indexes (elastic brittleness and mineral brittleness) in order to predict brittle shale distribution accurately: the former index, based on elastic parameters (Young's modulus and Poisson's ratio), characterizes the original physical properties of reservoirs, the other takes the volume content of minerals in the shale and brittle factor of each kind of mineral

Unlike conventional plays, shale plays have very low permeability and are both the trap and seal. These resources, until recently considered only the source rock for hydrocarbon reservoirs, are now recognized in their own right for their huge potential for both oil and gas production.

The elastic parameters are normalized to calculate the shale brittleness index under tensile loading: where is the normalized Young’s modulus (GPa), is the normalized Poisson’s ratio, and and are correction factors. The value range of is 0~1. The more brittle the rock is, the closer is to 1. 3.2.2. Quantification of brittleness index (BI) combined Poisson’s ratio and Young’s modulus of rock mechanical properties in shale is necessary in identification of favorable zones for hydro fracturing. Gamma ray, neutron porosity and resistivity logs are useful to characterize the reservoir. BIlith = brittleness index from lithology Vxxx = mineral volume fraction relative to total mineral volume. (fractional) This paper was specifically written for shale gas cases, which have naturally low porosity, and this index may not be useful in more porous rocks unless a porosity term is added to the denominator. brittleness index for shale was proposed by integrating Young’s modulus, Poisson’s ratio and fracture toughness. Moreover, a method for acquiring brittleness index from

The brittle and ductile behavior of shales has been deeply studied from estimation of their elastic

A mineral-defined brittleness index is computed from the XRD data, while the mechanical brittleness indices are computed from tensile and compressive strength testing of core from these shale formations. In the present study of stimulating unconventional shale gas reservoirs, the brittleness index profile along the reservoir payzone to identify the most desirable perforated intervals has become a common practice and has been considered as an indispensable geomechanics component in the approaches by the petro-physical domain.

BIlith = brittleness index from lithology Vxxx = mineral volume fraction relative to total mineral volume. (fractional) This paper was specifically written for shale gas cases, which have naturally low porosity, and this index may not be useful in more porous rocks unless a porosity term is added to the denominator.

A few weeks ago I looked at the concept — or concepts — of brittleness. There turned out to be lots of ways of looking at it. We decided to call it a rock behaviour rather than a property. And we determined to look more closely at some different ways to define it. Here they are. Unlike conventional plays, shale plays have very low permeability and are both the trap and seal. These resources, until recently considered only the source rock for hydrocarbon reservoirs, are now recognized in their own right for their huge potential for both oil and gas production. This study reports on a detailed review of existing BI definitions in the rock mechanics field, the transition from brittle to ductile and the application of BIs to shale fracturing.The success of shale gas recovery using hydraulic fracking is greatly dependent on the shale's brittleness, since brittle shales have many pre-existing fractures

The brittleness index outlines four shale brittleness factors: physical properties, confining stress, rock strength, and formation structure. The authors proposed a shale brittleness forecasting

Unlike conventional plays, shale plays have very low permeability and are both the trap and seal. These resources, until recently considered only the source rock for hydrocarbon reservoirs, are now recognized in their own right for their huge potential for both oil and gas production. This study reports on a detailed review of existing BI definitions in the rock mechanics field, the transition from brittle to ductile and the application of BIs to shale fracturing.The success of shale gas recovery using hydraulic fracking is greatly dependent on the shale's brittleness, since brittle shales have many pre-existing fractures The brittleness index is often used as a rock property that can be used to predict the fracturing behaviour of a rock for e.g. hydraulic fracturing of shales.