Seismic modeling evaluation of fault illumination in the Woodford Shale

Verma, Sumit; Mutlu, Onur; Marfurt, Kurt J.

doi:10.1190/segam2013-0491.1

Cited by 7 publications

(3 citation statements)

References 4 publications

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“…Seismic inversion results (e.g. impedance) have been used to predict fault zones, potential fractures and lithology in the Mississippian Limestone play Verma et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Linking for Rate of Penetration to Seismic Attributes and Mechanical Properties in the Mississippi Lime, OK

Xuan

Snyder

Marfurt

et al. 2015

SEG Technical Program Expanded Abstracts 2015

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The Mississippian Limestone is a heterogeneous formation. This heterogeneity impacts the rate of penetration (ROP). ROP is a function of bit size, weight on bit, drilling mud, and lithology, where lithology can be statistically correlated to surface seismic attributes. Because the bit actually destroys the rock, we expect correlations to be nonlinear; however, if even a soft correlation can be found, the economic impact on drilling could be significant, allowing the drilling engineer to prepare for and, if necessary, avoid problems associated with the drilling process.This study explores if a correlation can be found between seismic attributes, seismically derived mechanical properties and ROP. The seismic survey of this study is located in the Anadarko Shelf of Northern Oklahoma. Seismic attributes that may be indirectly related to the depositional and tectonic history are extracted from seismic data along wellbores in the depth domain. Seismic estimates of mechanical parameters are derived from seismic inversion and AVAz analysis. We show the results of several correlation techniques including multi-linear regression, neural networks, and alternating conditional expectation (ACE) algorithms.

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“…Seismic inversion results (e.g. impedance) have been used to predict fault zones, potential fractures and lithology in the Mississippian Limestone play Verma et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Linking for Rate of Penetration to Seismic Attributes and Mechanical Properties in the Mississippi Lime, OK

Xuan

Snyder

Marfurt

et al. 2015

SEG Technical Program Expanded Abstracts 2015

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“…The formation water density is also an input, however, for the current analysis, a fresh water density of 1000 kg/m 3 was assumed. Verma et al (2013); (12) Liu (1994) Inventory of Shale Formations in the US, Including Geologic, Geochemical, Hydrological, Mechanical, and Thermal Characteristics 56 September, 2014…”

Section: Application To Us Shale Formationsmentioning

confidence: 99%

Inventory of Shale Formations in the US, Including Geologic, Geochemical, Hydrological, Mechanical, and Thermal Characteristics

Dobson¹,

Houseworth²

2014

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SUMMARY Inventory of Shale Formations in the USThis section provides a summary of the distribution, thickness, and depth of selected shale formations found within many of the sedimentary basins in the contiguous US. Clay-rich shale formations have a number of properties, such as low permeability, high cation exchange potential, and the ability to self seal, which make them candidates for a geologic repository for high-level radioactive waste. The United States has an abundance of thick shale deposits that span a wide range of geologic ages, mineralogic compositions, and geologic environments, some of which might be suitable for hosting repositories to safeguard radioactive waste. The objective of this report is to build upon previous compilations of shale formations within many of the major sedimentary basins in the US by developing GIS data delineating isopach and structural depth maps for many of these units. These data are being incorporated into the Los Alamos National Laboratory (LANL) digital GIS database being developed for determining host rock distribution and depth/thickness parameters consistent with repository design. Additional rock properties, such as total organic carbon (TOC) abundance and thermal maturity, are also included where available. Rock Properties and In-Situ Conditions for Shale Estimated from Sonic Velocity MeasurementsThis section extends the development of methods to assess hydrological and geomechanical properties and conditions for shale formations based on sonic velocity measurements as reported in . In that effort, publically available data sets were identified for shales under investigation for nuclear waste disposal in Europe and from shales of interest for oil exploration and production in the North Sea. These data were used in the development of several correlations which link properties to sonic compressional velocity. The advantage of using correlations based on sonic velocity is that properties can be estimated from geophysical logs. This information is often more readily available than direct property measurements on core that would otherwise be required. Furthermore, geophysical logs typically provide a continuous readout along wells that can be more readily used to characterize spatial variability in properties. In this report additional information is provided on the correlation between clay content and sonic velocity presented in .Additional correlations are developed here between the sonic velocity and thermal properties, i.e., thermal conductivity and specific heat. Correlations between sonic velocity and the van Genuchten capillary strength parameter and the van Genuchten pore-size-distribution index are also presented. These van Genuchten parameters can be used for the computation of two-phase capillary pressure and relative permeability parameter functions of saturation. The correlations developed were then used to assess properties and conditions in several shale formations of interest within the United States which have publically available data on sonic veloc...

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“…(1) Montaut (2012); (2) Bruner and Smosna (2011); (3) Nunn (2012); (4) McDonal et al (1958); (5) Tosaya (1982); (6) Johnston and Christensen (1995); (7) CNX/GTI (2008); (8) Liu (1997); (9) Sondhi (2011); (10) Hardage (2013); (11) Verma et al (2013); (12) Liu (1994) …”

mentioning

confidence: 99%

Inventory of Shale Formations in the US, Including Geologic, Hydrological, and Mechanical Characteristics

Dobson¹

2013

View full text Add to dashboard Cite

SUMMARY Inventory of Shale Formations in the USThis section provides a summary of the distribution, thickness, and depth of selected shale formations found within many of the sedimentary basins in the contiguous US. Clay-rich shale formations have a number of properties, such as low permeability, high cation exchange potential, and the ability to self seal, which make them candidates for a geologic repository for high-level radioactive waste. The United States has an abundance of thick shale deposits that span a wide range of geologic ages, mineralogic compositions, and geologic environments, some of which might be suitable for hosting repositories to safeguard radioactive waste. The objective of this report is to build upon previous compilations of shale formations within many of the major sedimentary basins in the US by developing GIS data delineating isopach and structural depth maps for many of these units. These data are being incorporated into the LANL digital GIS database being developed for determining host rock distribution and depth/thickness parameters consistent with repository design. Rock Properties and In-Situ Conditions for Shale Estimated from Sonic Velocity MeasurementsThis section presents the development of methods to assess hydrological and geomechanical properties and conditions for shale formations based on sonic velocity measurements. Publically available data sets have been identified for shales under investigation for nuclear waste disposal in Europe and from shales of interest for oil exploration and production in the North Sea. These data have been used in the development of several correlations which link properties to sonic compressional velocity. The advantage of using correlations based on sonic velocity is that properties can be estimated from geophysical logs. This information is often more readily available than direct property measurements on core that would otherwise be required. Furthermore, geophysical logs typically provide a continuous readout along wells that can be more readily used to characterize spatial variability in properties. The correlations developed are then used to assess properties and conditions in several shale formations of interest within the United States which have publically available data on sonic velocity. Some of the proposed correlations have been previously investigated by others and comparisons between correlations are reasonably consistent. The approach has been extended here to other properties as well as insitu conditions, in particular, a method to estimate pore-fluid pressure. A method is also developed and used to account for anisotropy for properties where sufficient information is available to assess directional dependence. Some of the correlations, in particular estimation of sonic velocity parallel to bedding from normal to bedding sonic velocity measurements, and estimation of clay content from sonic velocity were found to be weak, indicating that additional independent measurements are desirable to supplement such estimates. Several ...

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Seismic modeling evaluation of fault illumination in the Woodford Shale

Cited by 7 publications

References 4 publications

Linking for Rate of Penetration to Seismic Attributes and Mechanical Properties in the Mississippi Lime, OK

Linking for Rate of Penetration to Seismic Attributes and Mechanical Properties in the Mississippi Lime, OK

Inventory of Shale Formations in the US, Including Geologic, Geochemical, Hydrological, Mechanical, and Thermal Characteristics

Inventory of Shale Formations in the US, Including Geologic, Hydrological, and Mechanical Characteristics

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