大慶長垣北部中淺層斷裂系統(tǒng)演化及成因機制研究
[Abstract]:Starting from the whole tectonic pattern of the study area, this paper makes a comparative analysis of the geometrical characteristics of the faults in different structural zones in the northern part of the Placanticline, and divides the tectonic units in the study area. The characteristics of fault development in different tectonic units are compared and analyzed in detail. On the basis of defining the whole structural pattern of the study area, using the fault fault-buried depth curve and the fault plane fault interval isoline map, combining with the fine correlation and growth index profile, The process of formation and evolution of the faults in the northern part of Daqing Placanticline is determined and the fault system is divided. Finally, based on the background of regional stress field and the development characteristics of different fault systems, the structure and the formation mechanism of faults in the study area are analyzed and discussed, and the physical simulation experiment is designed with Saltu fault fold inversion anticline as the focus. The formation process of type I and V mode faults and the fold inversion anticline are simulated. According to the geometric and kinematic characteristics of the faults in the study area, the faults are divided into five sets of fault system: 1: I mode 1 fault strike fault, the fault transgression horizon is T11-T06 or T11, and the fault is a type II fault pattern fault of NNW-NWW strike in the late Nen-late Ming and the late Paleogene period. The fault bed is T11, which is the active fault of Yao Jia-Nen 1 and 2 member. The fault zone is T11-T06, and the fault zone is T11-T06. it is a type IV fault pattern fault of Yaojia-Nen 1 and 2 member, and the strike fault of type IV NW-NW NW. The fault horizon is T2-T06, which is the active fault of Qingshankou formation-Yao Jia-Nen 1-2 member-inversion period, and the V-type fault is the strike fault of NNE, and the fault layer is T5-T06, which is the faulting period and the reverse active fault. The formation of positive and reverse faults and fold inversion anticlines in the study area is controlled by the inversion model of the basement slope flat faults. The fault fold inversion anticline is the anticline structure formed by the further deformation of the central uplift structure of the basement slope flat fault in the process of inversion. The positive and negative turn fault is formed by the NWW tensile stress field during the faulting period, and by the slope flat fault of the basement. The positive and negative turn fault .IV fault is formed during the deposition period of the Qingshankou formation under the action of the we tensile stress field during the inversion period, and the positive and negative turn fault is formed during the deposition period of the Qingshankou formation by the tensile stress field of the we direction. The inversion period was transformed by the left spin torsional stress field into a NW-NNW oriented. III-III fracture controlled by the NEE-SWW direction extension component of the reverse period left spin stress field. The type I fracture was formed by the inversion period controlled by the local tension stress field at the top of the reverse anticline, and the inversion period was controlled by the local tensile stress field at the top of the reverse anticline. Its strike is controlled by the NNW extrusion stress component in the reverse period.
【學(xué)位授予單位】:東北石油大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:P542
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