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库车坳陷吐孜洛克气田因钻井资料稀少 ,应用大量丰富的地表露头信息 ,开展上第三系吉迪克组砂泥岩段储集砂体预测更具有现实意义。通过在野外开展沉积微相分析及建立砂层组、储集层段规模两种不同尺度的原型模型 ,并运用储集层建筑结构层次分析法对砂体的类型、组合、规模及隔、夹层特征进行精细描述的基础上 ,运用原型模型提供的砂体几何形态、结构特征等参数 ,结合钻井、测井资料 ,采用条件模拟方法开展了吐孜洛克气田吉迪克组砂泥岩段井间储集砂体预测。研究表明 ,砂体以滨湖砂坝沉积为主 ,多呈板状 ,少量呈楔状或透镜状 ;砂岩集中段砂体厚度较薄 ,见复合式向上“变粗”型、单向式向上“变粗”型、韵律型等三种类型的复合砂体 ;砂体垂向上连通性较差 ,侧向连续性好 ,纵向上以第一、第二亚段为最有利的勘探目的层段。
Due to the scarcity of drilling data and the abundant information of surface outcrops, the Tuzluluo Gasfield in the Kuche Depression is more practical for the prediction of reservoir sandbodies in the Qidike Formation in the Upper Tertiary. Through the analysis of sedimentary microfacies in the field and the establishment of sandstone group, reservoir size of two different scales of the prototype model, and the use of reservoir structure analysis hierarchical structure of sand body type, composition, size and interval, mezzanine Based on the detailed description of the sandstone and mudstone characteristics and the parameters of sand body geometry and structural characteristics provided by the prototype model, Sand body prediction. The results show that the sand body is dominated by the lakeshore sand bar and mostly plate-shaped with a few wedges or lenticular shape. The sand body in the sandstone central section is thinner, and the composite upward “thick” type and the unidirectional upward “ Thickening ”type and rhythm type. The sand body has poor vertical connectivity and good lateral continuity. The first and second sub-sections are the most favorable exploration target sections in the longitudinal direction.