Downton, Improved AVO fluid detection and lithology discrimination using Lamé petrophysical parameters “λρ”,“μρ”, & “λ/μ fluid stack”, from P and S inversions, ( Society of Exploration Geophysicists, Tulsa, 1997), pp. H Russell, Simultaneous Inversion of pre-stack seismic data, Hampson-Russell Software Services Ltd., and Brad Bankhead ( Veritas DGC, Houston, 2005). Series: Earth and Environmental Science 38, 012007 (2016). Yilmaz, Seismic Data Analysis: processing, inversion and interpretation of seismic data ( Society of Exploration Geophysicists, Tulsa, 2001). Sukmono, Fundamental of Seismic Inversion ( ITB University, Bandung, 2005). The slicing map shows that the lithology and hydrocarbon fluid tend to spread to North West of field “X”. The existence hydrocarbon is indicated from cross plot Vp/Vs vs Lambda Rho, where the value of Vp/Vs is about 1.7–1.8 and Lambda Rho is about 40–60 Gpa *g/cc as well as the Mu rho value is about 40–80 Gpa * g/cc from the Mu Rho vs Density’s cross plot and the depth is about 8400–8750 ft based on depth-plot from measured depth (calculated from KB). Based on analysis of Lambda Mu Rho and Vp/Vs ratio, the reservoir has potential hydrocarbon. In this study we use angle gather as seismic input. Simultaneous inversion in field “X” is controlled by 2 wells, M01 and M02. Vp/Vs ratio can also be generated to sharply identify fluid content. We then extract Lame parameters from the 3 outputs that are Lambda Rho which is sensitive to fluid content and Mu Rho which is sensitive to lithology. It give the availability of the fluid parameters for the reservoirs, thus, simultaneous inversion gives benefittoward theacoustic inversion which only generates acoustic impedance. Simultaneous Inversion is implemented in this study as it can generate acoustic impedance, shear impedance and rock density simultaneously. Carbonate Reservoir has unique characteristics than the others because its diagenesis process which may affect highly heterogeneities. The reservoir located in northern East Java Basin in the form of big reef carbonate on Tuban Formation. Carbonate reservoir has been characterized in the field “X” using Simultaneous Inversion to determine lithology and fluid content.

Hampson russell fluid substitution