The Research On Tectonic Evolution Pattern Of The Eastern Junggar Basin Since The Permian And Its Control On The Source Rocks

Eastern Junggar Basin is located east of the northern fault-fold with a series of projections and depressions,North carat beautiful mountain is bounded on the south by Bogda is bounded by mountains,west to the Green Mountains Gerry bottom,construction is part of the eastern Junggar Basin a tectonic uplift belt unit.In recent years,we had foundsubstantial reserves of oil and gas fields in the North has three,Cainan region,Zhangbei fault-fold belt blocks.There are lots of controversy for the basin Zhundong nature,especially during the Permian.The various types of quasi-East reservoirs are closely related to the formation of basic Permian hydrocarbon source rocks,there are regional distribution of source rocks of Permian Pingdiquan group almost all accumulation,therefore the tectonic framenwork of the Permian Basin since is eaaential,tectonic evolution of late also affect the validity of the source rocks.Through seismic interpretation,well logging data analysis,outcrop observation,the use of basin analysis,tectonics,geology and oil and gas exploration theory,etc,combined with previous research results,study the geological structure of the basin and draw a cross sectional view of the tectonic evolution of the basin,a clear pattern of tectonic Zhundong since the Permian.By analyzing the sedimentary environment,sedimentary facies types of identification,so as to clarify the distribution and evolution of source rock,reservoir-clear key configuration of the cover.Mainly made the following understanding and achievement:(1)Through field investigation,provenance analysis and judgement,as well as regional sesmic data interpretation,clarify the tectonic environment of Permian,established a stretch squeeze converting construction unit in the context of evolution model,the Early Permian is in the orogenic extension phase,the Late Permian is in the extrusion stage.(2)Since the Permian,quasi-East experienced a late Hercynian,Indo-China,Yanshan,through seismic structure draw sectional drawing,combining a plurality of integrated analysis and tectonic evolution,explore the tectonic framenwork of Zhundong since Permian after its evolution mode.Triassic to Jurassic transpressional stage Cretaceous to Paleogene depression-subsidence,Neogene-Quaternary foreland regeneration stage.(3)A comprehensive analysis of key strata formation thickness and residual coupling structure patter since the Permian Zhundong,reveal temporal and spatial distribution of the main source rock,a clear exploration area resource potential and favorable direction.