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《Natural Gas Industry》 2006-06
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Dai Yong~1, Li Zhengwen~1, Wu Dakui~2 (~1 Chengdu University of Technology; ~2 Sichuan Petroleum Administration Bureau). Add: Sichuan Petroleum Administration Bureau, No.1, Sec. 1, Fuqing Rd., Chengdu, Sichuan Province 610213, P. R. China  
Geologic discontinuities, such as fault, fracture and accumulation and dissipation of oil and gas, are common and can cause abrupt change of seismic signals. Catastrophic theory has been successfully applied to reservoir prediction and fault detection. Equations of catastrophic potential in time domain and frequency domain are established through building cusp catastrophic model of seismic signal and are used to extract catastrophic potential and detect oil and gas potentials of reservoirs. Catastrophic potential in time domain is related with the development of faults and fractures, i.e. the higher the catastrophic potential is, the more developed the fractures are. While catastrophic potential in frequency domain is well correlated with oil and gas distribution in reservoirs, i.e. the higher the catastrophic potential is, the higher the possibility of oil and gas occurring in reservoirs is. Coincidence rate of drilling is over 80%. Its applications to carbonate reservoirs and clastic rock reservoirs of porous and fractured types show that catastrophic theory is applicable to prediction of reservoirs with different lithologies and reservoir spaces.
【CateGory Index】: P631.84
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