Abstract
Особенности состава и типа цемента нижнетриасовых коллекторов севера Тимано-Печорской нефтегазоносной провинции
Highlights
Within the Timan-Pechora oil and gas province, Triassic sediments account for 30% of the total basin filling
Lower Triassic sediments are characterized by considerable lateral and vertical heterogeneity, besides, they are often confined to deposits of heavy highviscosity oil, which causes considerable difficulties in choosing the method of development
This causes the need to identify the structural features of the pore space of the Lower Triassic sediments and the finely dispersed component, which cause different productivity
Summary
Within the Timan-Pechora oil and gas province, Triassic sediments account for 30% of the total basin filling. By the number medium- and coarse-grained, well washed sandstone and distribution in sandstones, the basal and porous types interlayers in which the most favorable conditions of cement are most common, the meniscus exist for free pore crystallization. Of calcite formation is early and late diagenetic, calcite of Cement of pore and bunch-pore type is represented the first type was formed together with sediment; due to by fine crystalline calcite and occurs in poorly sorted sedimentary calcite, some layers of sandstone retain their medium-grained sediments with a large amount of pink coloration.
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