Tsentralnaya geofizicheskaya expeditsiya, JSC, (city of Moscow, the company is a part of Rosgeo state Holding) conducted a detailed seismostratigraphic analysis of the Pre-Caucasian region. More than 7,000 linear km of regional seismic surveys were interpreted on the Tersko-Caspian foredeep through a regular grid connected on the basis of one-dimensional seismic modeling to deep exploration wells.

The Tersko-Caspian foredeep is one of the oldest oil and gas areas of Russia. Most of the fields are at the last stages of development. Rosgeo’s studies of allowed to allocate a new large area for further study and geological exploration.

The Tersko-Caspian fore deep is located between the Black and Caspian seas in the foreland of the Greater Caucasus. This is a large separate element of the North Caucasus.

Alec Akhverdiev, the senior expert of the Seismic Data Interpretation Department of CGE, JSC, shared the results of the study at the "GEOSOCHI-2019. Oil and Gas Geology and Geophysics" International Scientific-Practical Conference.

The specialists of the company developed a thrust formation conceptual model in the Tersko-Sunzhenskaya area. The duplex development area is similar to the Zagros thrust area, where there is the Iranian Gechsaran field. This analogy allowed to come to the conclusion about the prospects of the site in the Caucasus. A detailed analysis was conducted, and a number of models and schemes were made.

"The performed exploration allowed to look afresh at the evolution of the carbonate platform and significantly increase its prospects," Alik Akhverdiev said.

As a result, a structural trap of significant size in the upper Jurassic carbonates was discovered and mapped. The prospective resources were calculated by the DL category. The great perspectives highlight the fact that the prospective limestones are covered an excellent cap – salt layer. This site is recommended for further exploration.

Source: rosgeo.com