Shear‐wave birefringence: A new tool for evaluating fractured reservoirs

Martin, Marshall A.

doi:10.1190/1.1439333

Cited by 78 publications

(23 citation statements)

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“…Core analysis and field studies provided a semi-quantitative model for the fractured carbonate reservoirs but a hope for the future lay in recognizing and/or quantifying the degree and orientation of fracturing from 3D seismic. It was realized that conventional seismic data could not provide the required information on fracture frequency and orientations but that shear seismic could in principle give access to this information (Crampin 1984(Crampin , 1985Martin and Davis 1987). Since results reported by Lewis et al (1989) indicated that areas of high fracture density could be detected by shear-wave anisotropy in a field not unlike Natih, a nine-component three-dimensional (9C3D) survey was proposed.…”

Section: Introductionmentioning

confidence: 99%

The 3D shear experiment over the Natih field in Oman. Reservoir geology, data acquisition and anisotropy analysis

Potters¹,

Groenendaal

Oates

et al. 1999

Geophysical Prospecting

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This paper describes a large‐scale reservoir characterization experiment carried out in Oman in 1991 which comprised the acquisition, processing and interpretation of a 28.4 km2 3D multicomponent seismic experiment over the Natih field. The objective of the survey was to obtain information on the fracture network present in the Natih carbonates from shear‐wave anisotropy. Shear‐wave anisotropy in excess of 20% time splitting was encountered over a large part of the survey. The seismic results are confirmed by geological and well data but provide additional qualitative information on fracturing where this was not available before. Regions of stronger and weaker shear‐wave anisotropy appear to be fault‐bounded. The average well flow rates (which are fracture‐dominated) within such blocks correlate with the average anisotropy of the blocks. The further observation that the anisotropy is largest in the fracture gas cap of the reservoir suggests that shear waves can provide a direct hydrocarbon indicator for fractured rock.

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Section: Introductionmentioning

confidence: 99%

The 3D shear experiment over the Natih field in Oman. Reservoir geology, data acquisition and anisotropy analysis

Potters¹,

Groenendaal

Oates

et al. 1999

Geophysical Prospecting

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“…Among others, Amundsen et al (2001) showed how seabed systems could be used for multiple attenuation, and Martin and Davis (1987) and Bale et al (2000) reported the use of seabed data for detecting birefringence of shear waves. Veire and Landr (2006) discussed joint inversion of PP and PS wave data.…”

Section: De Kokmentioning

confidence: 99%

Tools and Techniques: Marine Seismic Methods

Robertsson

Laws²,

Kragh³

2015

Treatise on Geophysics

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“…Hence, a pre-drilling assessment of open fracture orientation is a crucial development parameter. The existence and orientations of fractured zones can be detected using downhole seismic shear wave anisotropy and borehole televiewer or imager data (Martin & Davis 1990). However, knowledge of the in situ stress field and failure mechanisms can also indicate most likely open natural and induced fracture directions, and such knowledge can be effectively utilized in petroleum engineering (Bell 1990).…”

Section: Figmentioning

confidence: 99%

A method of estimating horizontal principal stress magnitudes from stress-induced wellbore breakout and leak-off tests and its application to petroleum engineering

Zhou

1997

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Existing methods and a newly proposed method are used to estimate the magnitudes of the horizontal principal stresses from stress-induced borehole breakouts and leak-off tests. Under the condition that the depth interval between leak-off and breakout is sufficiently small, so that the stress ratios H / v and h / v can be reasonably regarded as constants within the depth range, both horizontal principal stresses H and h can be resolved with some knowledge of breakout width. A comparison of the methods has been conducted with well data from the North West Shelf of Australia. The estimated stress magnitudes are generally consistent with the measured trend from neighbouring modified leak-off (or hydraulic fracturing) tests, and also indicate that the tectonic stress regime in the depth range from 2.6 to 2.9 km, at the location of the borehole, is likely to be on the boundary between extension and strike-slip. Knowledge of the in situ stress field provides a crucial development factor in petroleum engineering, such as the optimum design of inclined or horizontal drilling for maximizing wellbore mechanical stability and recovery from fractured reservoirs.

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Shear‐wave birefringence: A new tool for evaluating fractured reservoirs

Cited by 78 publications

References 0 publications

The 3D shear experiment over the Natih field in Oman. Reservoir geology, data acquisition and anisotropy analysis

The 3D shear experiment over the Natih field in Oman. Reservoir geology, data acquisition and anisotropy analysis

Tools and Techniques: Marine Seismic Methods

A method of estimating horizontal principal stress magnitudes from stress-induced wellbore breakout and leak-off tests and its application to petroleum engineering

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