THE HISTORY OF FORMATION OF THE ANTICLINAL TRAPS IN THE JURASSIC SEDIMENTS AND OIL-AND-GAS DEPOSITS IN THE PRODUCTIVE STRATUM U<sub>2</sub> IN THE NORTH OF THE WEST-SIBERIAN OIL-AND-GAS PROVINCE
Paleotectonic reconstructions of anticlinal petroleum traps in the Jurassic petroleum-bearing mega-sequence are performed by use of the isopach triangle method. It is shown that they began to form at various times and had various intensities of growth. In the productive stratum U2, gas deposits began to form in the second half of the Early Cretaceous while the formation of oil deposits did not begin until the Late Cretaceous. The process of their formation had a long history.