Prediction of Pore Fluid and Lithology Using Incompressibility and Rigidity, Offshore Niger Delta, Nigeria

Authors : Ojo ODUNAYO, Agbasi OKECHUKWU, Namdie INYANG, Etuk SUNDAY, Robert UBONG

Pages : 109-120

View : 16 | Download : 4

Publication Date : 2020-10-15

Article Type : Research Paper

Abstract :Pore fluid and lithology content was determined using the calculated velocity ratio and Poisson’s ratio. From the analysis of velocity ratio and Poisson’s ratio, the gas sand, oil sand, and brine sand were mapped out. The gas sand predicted from the rock physics analysis using lambda-mho and mu-rho was confirmed by the analysis of velocity ratio and Poisson’s ratio. The analysis of velocity ratio and Poisson’s ratio was used to further describe the wet sand predicted by the rock physics analysis of lambda-mho and mu-rho. The wet sand from the rock physics analysis of lambda-mho and mu-rho was predicted to comprise of oil sand and brine sand. The value of lambda-mho is between 21.74 to 25.67, for mu-rho is between 16.34 to 23.21 for Poisson’s ratio is between 0.25 to 0.29 and for Vp/Vs ratio is between 1.74 to 1.83, these confirm the presence of oil sand in all the seven insert ignore into journalissuearticles values(7); reservoirs studied in two insert ignore into journalissuearticles values(2); wells, all the reservoirs fall between the Agbada region insert ignore into journalissuearticles values(10212.50-11741.00 ft); and have a very good net pay zone ranging from 41.50 ft to 193.00 ft in the Niger Delta region, Nigeria.
Keywords : Mu Rho, Lambda Rho, Density, Velocities, Lame Parameters

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