Reefogenic Lower Permian megareservoirs in the south of the Khoreyver depression of the Timan-Pechora province in connection with the prospects for oil and gas potential

Abstract

In the southern part of the Khoreyver depression, a structure of the first order, which is a fragment of the supra-order Pechora megasyneclise, ring and linearly elongated structures have been established - parts of the complex Assel-Sakmar reef system. In the Sandiveyskaya area, the reef formations of the Lower Permian are commercially oil and gas bearing. Several fields have been discovered here: Sandiveyskoye, Severo-Khayakhinskoye, Veyakshorskoye, Vostochno-Veyakskoye, Salyukinskoye and others, including those with high oil production rates. As a result of the analysis of 2D and 3D seismic data and a complex of drilling and well logging data, numerous reservoir zones with high porosity and permeability properties were identified and mapped in the upper parts of reef structures, which are highly promising objects for the search for oil and gas deposits in the Lyzayuskoye, South Sandivey and East Bagan areas. Keywords: reef systems; oil and gas reservoirs; filtration-capacitive properties.