| In view of the lack of a unified understanding of the formation time and evolution characteristics of the southwestern Taurus paleo-uplift,the influence of the Southwest Tarim paleo-uplift on the hydrocarbon accumulation elements also needs to be further studied.Using seismic data,combined with drilling,outcrop and other data,this paper clarifies that the formation time of the Southwest Tarim paleo-uplift was the Early Cambrian;The evolution and changes of the southwest paleo-uplift have been deeply analyzed,and the formation and evolution of the paleo-uplift can be roughly divided into three stages:(1)Caledonian-Early Hercynian,(2)Late Hercynian,(3)Himalayan,Caledonian-Early Hercynian The Hercynian period was the formation and development period of the southwestern Taxi paleo-uplift.In the late Hercynian period,the western section of the Taxi-nan paleo-uplift began to migrate.During the Himalayan period,the eastern and western sections of the Ta-xinan paleo-uplift completely migrated,and the south-western Taxi paleo-uplift subsided and disappeared.Through the study of tectonic evolution,it is found that the migration time and migration process of the eastern and western sections of the Southwestern Tarim paleouplift are very different,and it is precisely because of the difference in the evolution process that different influences on the hydrocarbon accumulation elements are caused.The anatomy of typical oil and gas reservoirs clarifies that the paleo-uplift in the southwestern Tarim restricts the distribution of source rocks and affects the development of reservoirs,and the large number of faults and unconformities formed along with the paleo-uplift in the southwestern Tarim River have become effective migration channels.The accumulation model of "the Yuertus Formation in the lower cold system and the Cambrian-Ordovician dolomite constitute the accumulation assemblages,the faults are connected to the source,and the reservoirs control the richness". |
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