Application of staggerred pseudospectrum method in simulating seismic wave field of reef beach facies reservoirs
Ba Jing1, Cao Hong1, Yao Feng-chang1, Kong Li-yun2, Shou Hao1, Liu Tong2, Yang Hui-zhu2
1. Geophysical Technology Institute, Research Institute of Petroleum Exploration and Development of PetroChina, Beijing City, 100084, China;
2. Department of Engineering Mechanics, Tsinghua University, Beijing City, 100084, China
Abstract：Based on sonic log data in F area of western China, four-layer reef beach facies geological model was designed in this paper, air and water were used to replace the fluid inside the reef and beach, and the staggerred pseudospectrum method was used to simulate seismic wave field of the reef beach facies reservoirs, as a result the non-convergence was avoided when routine pseudospectrum method was used to simulate the small size reef and beach, and the calculation efficiency was raised. The studies achieved the following results: (1): whether reef and beach contain gas or water, their sizes and boundary can be clearly imaged, when comparing with the gas-bearing reef and beach model, for the model in which the reef bearing water and the beach bearing gas, reef's boundary can be clearly imaged while the beach's boundary was imaged fuzzily. (2): if totally based on full elastic wave propagation theory, small reef beach structure which is 3000 meter below the surface can be accurately detected from surface seismic data, if the surround rock's velocity and porosity are known, the gas and water distribution can be directly detected from surface seismic data, but in real world the detecting of reef and beach are affected by many factors, especially the seismic wave attenuation and frequency dispersion, therefore for strata which contain fluid, the velocity modeling within the seismic frequency band will be the problem which must be overcame at the moment.
巴晶, 曹宏, 姚逢昌, 孔丽云, 首皓, 刘炯, 杨慧珠. 利用错格虚谱法模拟礁、滩相储层地震波场[J]. 石油地球物理勘探, 2010, 45(2): 177-184.
Ba Jing, Cao Hong, Yao Feng-chang, Kong Li-yun, Shou Hao, Liu Tong, Yang Hui-zhu. Application of staggerred pseudospectrum method in simulating seismic wave field of reef beach facies reservoirs. OGP, 2010, 45(2): 177-184.
