1. 中国石油勘探开发研究院，北京 100083
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，北京 102200
Rock physics modeling of heterogeneous carbonate reservoirs: porosity estimation and hydrocarbon detection
Yu Hao1, Ba Jing1, Carcione Jose2, Li Jin-Song1, Tang Gang1, Zhang Xing-Yang1, He Xin-Zhen3, and Ouyang Hua3
1. Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China.
2. Istituto Nazionale di Oceanografia edi Geofisica Sperimentale (OGS), Borgo Grotta Gigante 42c, Sgonico, Trieste 34010, Italy.
3. Amu Darya Petroleum Company Ltd., CNPC, Beijing 102200, China.
Abstract：
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, 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.
YU Hao,BA Jing,Carcione Jose et al. Rock physics modeling of heterogeneous carbonate reservoirs: porosity estimation and hydrocarbon detection[J]. APPLIED GEOPHYSICS, 2014, 11(1): 9-22.
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2014, Vol. 11 
