Rock physics modeling of heterogeneous carbonatereservoirs： porosity estimation and hydrocarbon detection  

非均质碳酸盐岩储层岩石物理建模:孔隙度估算与烃类检测(英文)

作　　者：于豪[1] 巴晶[1] Carcione Jose 李劲松[1] 唐刚[1] 张兴阳[1] 何新贞 欧阳华 

机构地区：[1]中国石油勘探开发研究院 [2]Istituto Nazionale di Oceanografia edi Geofisica Sperimentale(OGS),Borgo Grotta Gigante 42c,Sgonico,Trieste 34010,Italy [3]中国石油阿姆河天然气公司

出　　处：《Applied Geophysics》2014年第1期9-22,115,共15页应用地球物理（英文版）

基　　金：sponsored by the NSFC(41104066);973 Program of China(No.2014CB239006);NSTMP of China(Nos.2011ZX05004-003 and 2011ZX05029-003);12th 5-Year Basic Research Program of CNPC(No.2011A-3601)

摘　　要：In heterogeneous natural gas reservoirs, gas is generally present as small patchlike pockets embedded in the water-saturated host matrix. This type of heterogeneity, also called "patchy saturation", causes significant seismic velocity dispersion and attenuation. To establish the relation between seismic response and type of fluids, we designed a rock physics model for carbonates. First, we performed CT scanning and analysis of the fluid distribution in the partially saturated rocks. Then, we predicted the quantitative relation between the wave response at different frequency ranges and the basic lithological properties and pore fluids. A rock physics template was constructed based on thin section analysis of pore structures and seismic inversion. This approach was applied to the limestone gas reservoirs of the right bank block of the Amu Darya River. Based on poststack wave impedance and prestack elastic parameter inversions, the seismic data were used to estimate rock porosity and gas saturation. The model results were in good agreement with the production regime of the wells.In heterogeneous natural gas reservoirs, gas is generally present as small patch-like pockets embedded in the water-saturated host matrix. This type of heterogeneity, alsocalled ＂patchy saturation＂, causes significant seismic velocity dispersion and attenuation. Toestablish the relation between seismic response and type of fluids, we designed a rock physicsmodel for carbonates. First, we performed CT scanning and analysis of the fluid distributionin the partially saturated rocks. Then, we predicted the quantitative relation between the waveresponse at different frequency ranges and the basic lithological properties and pore fluids.A rock physics template was constructed based on thin section analysis of pore structuresand seismic inversion. This approach was applied to the limestone gas reservoirs of the rightbank block of the Amu Darya River. Based on poststack wave impedance and prestack elasticparameter inversions, the seismic data were used to estimate rock porosity and gas saturation.The model results were in ~ood a^reement with the production regime of the wells.

关 键 词：Rock PHYSICS modeling  Biot-Rayleigh theory  heterogeneity  porosity  saturation velocity dispersion  gas RESERVOIR detection 

分 类 号：P[天文地球]