Impact of Reservoir Fluid Saturation on Seismic Parameters: Endrod Gas Field, Hungary

World Multidisciplinary Earth Sciences Symposium 2017

El Sayed, Abdel Moktader A.^1 ; El Sayed, Nahla A.^2

Department of Geophysics, Faculty of Science, Ain Shams University, Egypt^1

Department of Exploration, Egyptian Petroleum Research Institute, Egypt^2

关键词: Compression and shear;    Hydrocarbon exploration;    Laboratory measurements;    Mechanical parameters;    Partially saturated samples;    Saturation percentages;    Seismic parameters;    Seismic velocities;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/95/3/032028/pdf
DOI  :  10.1088/1755-1315/95/3/032028

来源: IOP

【 摘 要 】

Outlining the reservoir fluid types and saturation is the main object of the present research work. 37 core samples were collected from three different gas bearing zones in the Endrod gas field in Hungary. These samples are belonging to the Miocene and the Upper - Lower Pliocene. These samples were prepared and laboratory measurements were conducted. Compression and shear wave velocity were measured using the Sonic Viewer-170-OYO. The sonic velocities were measured at the frequencies of 63 and 33 kHz for compressional and shear wave respectively. All samples were subjected to complete petrophysical investigations. Sonic velocities and mechanical parameters such as young's modulus, rigidity, and bulk modulus were measured when samples were saturated by 100%-75%-0% brine water. Several plots have been performed to show the relationship between seismic parameters and saturation percentages. Robust relationships were obtained, showing the impact of fluid saturation on seismic parameters. Seismic velocity, Poisson's ratio, bulk modulus and rigidity prove to be applicable during hydrocarbon exploration or production stages. Relationships among the measured seismic parameters in gas/water fully and partially saturated samples are useful to outline the fluid type and saturation percentage especially in gas/water transitional zones.