Refinement of the Structure of the Eastern Govsan Area Using a New Method of Seismic Inversion and a Lithological Model of the Zykh Field of Azerbaijan Based on 3D and GRW Seismic Data

Abstract

This paper discusses current issues related to modeling the lithology of oil and gas-bearing rocks in the old field Zykh using new technologies for processing and interpreting 3D seismic data and geophysical research of wells (GRW) to increase the resource base of the field. The purpose of this research is to identify the most promising lithological sections and intervals of the section that have higher reservoir properties according to the data of 3D and GRW seismic integration. The subjects of research are 3D seismic data and logging curves of geophysical research of wells (GRW), a priori geological and geophysical data accumulated during the period of exploration and operation of the field. The object of research is the Zykh field. The paper presents a brief history of geological and geophysical study, stratigraphy and lithology of the deposition that make up the section of the Zykh field. Research result: 1. Analysis of the obtained data shows that even within individual tectonic blocks (segments), the lithology of fields is variable and one or another fraction dominates during the transition from one block to another. The same is observed in sections A-B, which crosses the field from north to south. Modeling of deposition lithology was not carried out in all segments (tectonic blocks) of fields, but it should be noted that there are not very many of them.

Conclusion: The problem was solved successfully, the field was divided into separate tectonic blocks (segments) based on 3D seismic data, and a lithological model was built for each segment using 3D seismic data and GRW of wells. Examples of modeling of lithology on the example of one of the segments of the model of the lower part of the productive layer (layers PF and KaF) are shown in the form of maps and sections.