Changes

==Factors That Influences Amplitude==

==Factors That Influences Amplitude==

Factors that influences velocity of wave are porosity, density, temperature, grain size, gas saturation, frequency, external pressure, pore pressure and stress. The curve between P wave velocity and various parameters are shown in the figure below. The most influential factor on the P wave velocity changes include porosity, gas saturation, external pressure and pore pressure. The relationship between gas saturation and P wave velocity drops drastically resulting in the formation of anomalies such as DHI, AVO, and others.  

Factors that influences velocity of wave are porosity, density, temperature, [[grain size]], gas saturation, frequency, external pressure, pore pressure and stress. The curve between P wave velocity and various parameters are shown in the figure below. The most influential factor on the P wave velocity changes include porosity, gas saturation, external pressure and pore pressure. The relationship between gas saturation and P wave velocity drops drastically resulting in the formation of anomalies such as DHI, AVO, and others.  

[[File:Aapg 7.png|300px|thumbnail|center|Figure 7 Some Parameter That Influence to P Wave Velocity<ref>Hilterman, F. J., 2001, Seismic amplitude interpretation: short course notes. Distinguished Instructor Series no. 4. Society of Exploration Geophysicists, Tulsa, Oklahoma</ref>]]

[[File:Aapg 7.png|300px|thumbnail|center|Figure 7 Some Parameter That Influence to P Wave Velocity<ref>Hilterman, F. J., 2001, Seismic amplitude interpretation: short course notes. Distinguished Instructor Series no. 4. Society of Exploration Geophysicists, Tulsa, Oklahoma</ref>]]