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储层裂缝分布规律和单砂体时空展布特征是孔隙-裂缝型储层研究的重点,也是陕甘宁盆地上古生界中部气田获得高产的主要控制因素。通过研究作者认为,储层构造裂缝的发育与单砂体的岩性、厚度及储层所处的构造位置均有明显关系,鼻状构造高部位且岩性较粗的储层,裂缝最为发育。根据这一认识,作者对裂缝平面的分布规律进行了预测。同时文中在高精度、等时地层格架建立的基础上,从储层沉积相和沉积微相入手,研究了单砂体的展布规律和储集性能的时空变化,并对有效储层的分布进行了预测。
The distribution of reservoir fractures and the characteristics of space-time distribution of single sand body are the focuses of the research on pore-fractured reservoirs, and also the main controlling factors for obtaining high yield in the middle Paleozoic gas field in the Shan-Gan-Ning basin. According to the author’s opinion, the development of reservoir structural fractures is obviously related to the lithology and thickness of single sand body and the structural position where the reservoirs are located. In the nose-shaped structure, the reservoir with high lithology and coarse parts is the most developed . Based on this understanding, the author predicted the distribution of fracture plane. Based on the establishment of high-precision and isochronal stratigraphic framework, this paper studies the distribution law of single sand body and the temporal and spatial variation of reservoir properties from the sedimentary facies and sedimentary microfacies. Distribution was predicted.