Overpressure detection from compressional- and shear-wave data

被引：97

作者：

Dvorkin, J ^{[1
]}

Mavko, G ^{[1
]}

Nur, A ^{[1
]}

机构：

[1] Petrophys Consulting Inc, Emerald Hills, CA 94061 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 1999年 / 26卷 / 22期

关键词：

D O I：

10.1029/1999GL008382

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

By analyzing experimental data we show that in many room-dry rocks, the Poisson's ratio (PR) decreases with decreasing differential pressure (confining minus pore pressure). This means that in gas-saturated rocks, PR decreases with increasing pore pressure. We confirm the generality of the observed effect by theoretically reproducing it via effective medium modeling. This effect can be used as a new tool for overpressure detection from surface seismic, cross-well, sonic logs and measurements ahead of the drill bit.

引用

页码：3417 / 3420

页数：4

共 19 条

[1]

[Anonymous], THESIS MIT

[2]

[Anonymous], 1993, THESIS STANFORD U

[3] LONG-WAVELENGTH PROPAGATION IN COMPOSITE ELASTIC MEDIA .1. SPHERICAL INCLUSIONS [J].

BERRYMAN, JG .

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 1980, 68 (06) :1809-1819

[4]

Blangy J.-P.D., 1992, INTEGRATED SEISMIC L, VI and II

[5]

BOWERS GL, 1994, 27488 IADCSPE

[6]

DVORKIN J, 1999, IN PRESS GEOPHYSICS

[7]

Gassmann F., 1951, Vierteljahrsschr. Naturforsch. Ges. Zur., V96, P1, DOI DOI 10.1190/1.9781560801931.CH3P

[8]

GRAULS D, 1995, P OTC C HOUST

[9]

Han D, 1986, Effects of porosity and clay content on acoustic properties of sandstones and unconsolidated sediments

[10]

HUFFMAN AR, 1998, C P HOUST

← 1 2 →