Separation of the seismic facies using seismic attributes obtained from simultaneous seismic inversion in one of the oil fields in southern Iran

Yari Hasan Abadi, Fatemeh; Kazemi, Kazem; Gharibi, Mojtabba

Separation of the seismic facies using seismic attributes obtained from simultaneous seismic inversion in one of the oil fields in southern Iran

Document Type : Original Article

Authors

Fatemeh yari hasan abadi ¹

Kazem Kazemi ²

Mojtabba Gharibi ²

¹ Graduated in Geophysics Master, Kharazmi University, Tehran, Iran

² Pars Petro Zagros Geophysics Company, Tehran, Iran

Abstract

Today, quantitative evaluation and interpretation of seismic data are of particular importance to better understand the reservoir characteristics of oil and gas fields. One of the important stages of evaluating a reservoir is describing the reservoir facies and distinguishing the different lithologies of the study area. Therefore, amplitude versus offset (AVO) analysis is one of the most important advanced methods for the analysis of geological facies, lithology, and fluid detection. In this study, simultaneous seismic inversion has been used in one of the oil fields in southern Iran on the Asmari formation. This study aims to separate the seismic facies using seismic attributes obtained from simultaneous seismic inversion, including acoustic impedance (IP), shear impedance (IS), and compression wave velocity to shear wave velocity ratio ( v_p/〖 v〗_s ). The results of this study demonstrated that if the quality of the data is good and the simultaneous inversion is performed with high accuracy, the analysis of pre-stack seismic attributes can lead to the separation of seismic facies with a high resolution.

Keywords

simultaneous seismic inversion

pre-stack seismic attributes

acoustic impedance (IP)

shear impedance (IS)

separation of seismic facies

Subjects