Sentence examples for shale volume from inspiring English sources
The conventional GR (gamma ray) index model is widely used to calculate shale volume in a drilling hole.
The petrophysical parameters determined by the inversion are a shale volume, dolomite volume, matrix porosity, secondary porosity and secondary porosity type (aspect ratios of spheroids approximating secondary pores).
The results demonstrate the applicability of the equation to well-log interpretation as a procedure for computing shale volume in shaly sand sedimentary sections.
At last, we give an explanation to a long-term problem in GR index model that GR index is generally larger than the actual shale volume.
As a result, approximated section of wavelet transform of data was used for fracture detection, while shale volume (or gamma ray) log data was used to filter part of the errors in prediction and identification of the uncertain zones.
Reliable evaluation of porosity in clean and/or shaly formations requires knowledge of matrix (type and nature), fluid, shale volume and shale transit time affecting the determination of such parameter.
The results of the new model are in better consistent with shale volumes from X-ray diffraction analysis in Site 1173 and well-log inversion in the exploratory hole.
The recoverable shale gas volume presented in Table 1 shows that in all over the world there is around 7795 trillion cubic feet (Tcf) of only shale gas are present.
The main input parameters that are required to model fluid flow in a fractured system are fracture permeability, fracture compressibility, fracture porosity, shape factor, and the productive shale net volume in SRV (NTGshale).
Replacing the Vsh term with Sb, the Rsh term with Rb and including the Fsh term (Shale formation volume factor) in the Simandoux equation, Eq. (3) then becomes Eq. (15): fR_{text{t}{text{t}} }} = frac{{S_{text{w}}^{n} }}{{FR_{text{w}} }} + frac{{S_{text{b}} S_{text{w}}^{{left( {n - 1} right)}} }}{{F_{text{sh}} R_{text{b}} }}.
A soon-to-be-updated study by the Polish Geological Institute in March 2012 estimated that recoverable shale gas volumes under the country at between 346bn and 768bn cubic metres - the third biggest in Europe and enough to supply the country's gas needs for between 35 and 65 years.
