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通过野外露头、钻井岩心薄片的观察,在塔里木盆地东部辨识出寒武系大量碳酸盐深水重力流沉积,并划分出斜坡角砾岩、高密度钙屑浊积岩、低密度钙屑浊积岩等三种类型。通过单井厚度标定、地震相分析和区域成图,平面上沿斜坡发育较大规模碳酸盐深水重力流沉积,宽度达40~80 km,厚度达50~150 m。分析测试和测井解释资料表明,重力流(特别是高密度浊积岩)可以发育厚度较大的良好储层。塔东寒武系斜坡区碳酸盐深水重力流油气显示丰富,是值得深入探索的勘探领域。
Through the outcrop of the outcrop and the observation of the drilling core sheet, a large amount of carbonate deep water gravity flow deposits in the Cambrian are recognized in the eastern Tarim Basin, and are divided into slope breccia, high-density calcareous turbidite, low-density calcareous turbidite Rock and other three types. Through single-well thickness calibration, seismic facies analysis and regional mapping, large-scale carbonate gravity flow deposition along the slope is developed on the plane with a width of 40-80 km and a thickness of 50-150 m. Analytical testing and log interpretation data indicate that gravity reservoirs, especially high-density turbidites, can develop well-preserved, thick reservoirs. Carbonate deep-water gravity flow in the Tarim Cambrian slope area shows abundant oil and gas, which is worth to explore in depth.