A comparison of rock physics models for fluid substitution in carbonate rocks

被引：20

作者：

Misaghi, Ali ^{[1
]}

Negahban, Sajjad ^{[2
]}

Landro, Martin ^{[3
]}

Javaherian, Abdolrahim ^{[4
]}

机构：

[1] Dana Geophys Co, Tehran 1465865187, Iran

[2] Amir Kabir Univ Technol, Tehran, Iran

[3] Norwegian Univ Sci & Technol, N-7491 Trondheim, Norway

[4] Univ Tehran, Inst Geophys, Tehran 1435944411, Iran

来源：

EXPLORATION GEOPHYSICS | 2010年 / 41卷 / 02期

关键词：

carbonate reservoirs; differential effective medium model; Gassmann's model; rock physics; self-consistent model; LONG-WAVELENGTH PROPAGATION; COMPOSITE ELASTIC MEDIA; ULTRASONIC FREQUENCIES; COMPRESSIONAL WAVE; SHEAR; VELOCITY; INCLUSIONS;

D O I：

10.1071/EG09035

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Rock physics models play a crucial role in seismic reservoir characterisation studies. The optimal rock physics model for a sandstone reservoir might be significantly different from that of a carbonate reservoir. There are several theories that compare the elastic properties of dry and saturated rocks. These models have mainly been explained by poroelastic theories or effective medium theories. The Gassmann's model which is commonly used in petroleum rock physics is suitable for rocks with spherical and interconnected pores at low frequencies. These assumptions do not necessarily meet the conditions of carbonate rocks. In this work, two additional models, the differential effective medium (DEM) model and the self-consistent (SC) model have been examined for several carbonate samples. Ultrasonic 30 carbonate and 5 sandstone core samples from an oil field in south-west Iran were measured in the laboratory. The results show that the DEM model gives the best compatibility with the dense and low porous carbonate samples. These results are confirmed by well log data from the same area.

引用

页码：146 / 154

页数：9

共 35 条

[31] INFLUENCE OF FLUID CHEMISTRY ON SHEAR-WAVE ATTENUATION AND VELOCITY IN SEDIMENTARY-ROCKS [J].