Reservoir characterization and density–velocity analysis using rock physics and integrated multi‐types post‐stack inversion to identify hydrocarbon possibility and litho‐prediction of Mishrif formation in the Kumaite and Dhafriyah oil fields, Southern Iraq

Abstract

Litho‐prediction is a non‐unique process that requires more than integrated techniques to reinforce the final results and harmonize hydrocarbon probability. Consequently, integrated procedures have been started with log data of the Mishrif formation in different site locations and involve petrophysics and rock physics analyses altogether to evaluate the general situation of the formation. In the second stage, we performed seismic inversion for 3D seismic data in the Kumaite and Dhafriyah oil fields. A brand‐new technique called pseudo–post‐stack simultaneous inversion has been used to calculate all the elastic engineering properties of the seismic cube. This method is performed by utilizing a real genetic inversion model that would be used to calibrate a low‐frequency model of simultaneous inversion to enhance the resolution and event isolation of the final inverted cube to identify reservoir characterization. The final output then is used to perform quantitative analysis and determine the productive layers within the area of interest. Density–velocity analysis also plays an extraordinary role in establishing the main relationship between different elastic parameters. Finally, by using the local equation and global density–velocity equations, different velocities of carbonate succession have been calculated.

Hydrocarbon Possibilities and Structural Setting in Ad'Daimah Oil Field, Southern Iraq

“…Bright spots can be generated by events other than the presence of hydrocarbons, such as a change in lithology, but they can also be caused by huge changes in acoustic impedance and tuning effect, such as when a gas sand sits beneath a shale. [7].…”