准南喀拉扎背斜侏罗系油砂特征及资源潜力评价
[Abstract]:There are abundant oil sand resources and uneven exploration and development in Northwest China. From the view of the exploration situation at present, in the northwestern margin of Junggar Basin, Qiketai area in Turpan-Hami Basin, Yuka in Qaidam Basin, oil sand mountain in Qaidam Basin, The exploration work of oil sand resources in Ganchaigou and other areas is relatively deep. Among them, Wuerhe area on the northwest margin of Junggar basin, Yuegou area of Jiuxi basin and Qiketai area of Turpan-Hami basin have entered the stage of exploitation of oil sand resources. Relatively speaking, the degree of exploration and development of oil sands, an unconventional oil and gas resource, is relatively low in the southern margin of Junggar Basin. The data and content of this paper are based on the project "investigation and Evaluation of Oil Sand Resources in key areas of China", which is funded by the Oil and Gas Resources Survey Center of China Geological Survey. First of all, the field geological survey and the profile measurement of oil sand outcrop in the study area are carried out, and the core data of the oil sand well Ka-Shao 1 in the oil sand exploration well are recorded. The distribution and geological characteristics of oil sand resources in the study area are clarified. Using the rock samples obtained in the field of the study area for the observation of indoor sheet, cast slice and scanning electron microscope, combined with the previous research data, the petrological characteristics, reservoir space characteristics and physical properties of oil sand reservoir in the study area were demonstrated and analyzed. The sedimentary facies of the study area are identified by means of particle size analysis, and then the oil content of the oil sand reservoir and the geochemical and isotopic test data of the oil sand in the study area are combined. The degradation process and degradation degree of oil sands in the study area are analyzed and evaluated. Finally, the distribution, geological and degradation characteristics of oil sand resources, petrological characteristics of oil sand reservoir are deduced from the study. The characteristics of reservoir space and physical properties, the controlling factors of reservoir formation of oil sand deposits in the study area are analyzed, the reservoir forming model of oil sand deposits in the study area is further established, the reserves of oil sand resources in the study area are calculated, and the potential of oil sand resources in the study area is evaluated. In the study area, the oil sand reservoirs are mainly distributed in the Jurassic Sangonghe formation and the Toutunhe formation, which are exposed in both the anticline core and the north and south flanks. The oil sand reservoirs of the Sangonghe formation are mainly exposed to the anticline core, and the lithology is mainly grayish-white siltstone. The reservoirs of Toutunhe formation are exposed on the north and south flanks of the anticline, and the lithology is mainly yellowish brown medium coarse sandstone. The reservoir space types of oil sand reservoirs in the study area are mostly secondary pores, the physical properties of reservoirs vary from low porosity and low permeability to high porosity and high permeability, and the physical properties of Toutunhe formation reservoir are slightly better than that of Sangonghe formation reservoir. In terms of sedimentary facies, the stratigraphic sedimentary facies of Sangonghe formation in the study area are preliminarily inferred as lacustrine shallow lacustrine subfacies, while the Toutunhe formation is dominated by meandering stream sedimentary system. The sedimentary facies of oil sand reservoir are mainly Niuyong Lake subfacies, riverbed retention deposits and beach deposits of river bed subfacies. The geochemical analysis of oil sands showed that the Jurassic oil sand resources in the study area were mainly the products of higher plants, and the species and configurations of terpene and sterane were only the ones with the strongest antioxidant capacity. Jurassic oil sands have been severely degraded in the reaction study area. In the study area, the controlling factor of Jurassic oil sand accumulation is 1: 1, the favorable source rock type is 2, and the reservoir space with good physical properties is 3, which is beneficial to the structural activity of reservoir formation. The reservoir forming type belongs to the tectonic uplift type and is closely related to the tectonic evolution of the study area. According to the oil sand formation revealed in well 1 of kha oil sand, the total resource quantity of oil sand predicted by Toutunhe formation in the prediction research area is 5053.23 脳 10 ~ 4 t, and the potential of oil sand resource is great, which needs further exploration and study.
【学位授予单位】:吉林大学
【学位级别】:硕士
【学位授予年份】:2017
【分类号】:P618.13
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