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塔中低凸起是塔里木盆地重要的油气富集单元,其东部早期构造活跃,地质记录丰富,是认识塔中地区地质发育历史和油气成藏条件的窗口。利用钻井和地震资料,进行综合地质建模和构造反演,重建了塔中东部地区古生代构造沉积发育过程。研究表明在中奥陶世区域古隆起的基础上,晚奥陶世良里塔格组沉积期沿古隆起边缘发育台缘礁滩体,晚奥陶世末为构造定型期,塔中地区发生多次强烈的陆内挤压冲断变形,平衡剖面恢复得到塔中低凸起东部水平缩短量为4.5 km。受早期构造活动的影响,该区奥陶系碳酸盐岩储层的油气聚集主要受断裂和裂缝控制,良里塔格组台缘礁滩体是最有利的勘探领域,构造反演表明塔中I号断裂带下盘可能隐伏更大规模的台缘礁滩体,勘探潜力巨大。
The low-middle Tarim Basin is an important unit of oil and gas accumulation in the Tarim Basin. Its early tectonic activity and abundant geological records in the east of the Tarim Basin are the windows for understanding the geological development history and hydrocarbon accumulation conditions in the Tazhong area. Using drilling and seismic data, the authors conducted comprehensive geologic modeling and structural inversion to reconstruct the Paleozoic tectonic depositional development in the eastern part of the tower. Based on the paleo-uplifts in the Middle Ordovician area, the study shows that the margin-uplifted margin of the Paleo-uplifted Ordovician was developed along the paleo-uplift margin of the Ordovician. Late Late Ordovician was the tectonic setting period and more occurred in the Tazhong area Intense intracontinental extrusion thrusting and deformation, the balance section of the restoration of the eastern low-rise in the eastern horizontal shortening of 4.5 km. Affected by the early tectonic activity, the hydrocarbon accumulation in the Ordovician carbonate reservoirs in this area is mainly controlled by faults and cracks. The marginal reef banks in the Lianglitage Formation are the most favorable exploration areas. The structural inversion shows that the tower The lower I fault zone plateau may conceal the larger-scale platform margin reef body, with great exploration potential.