一般以孔隙度下限划分储层段，其裂缝发育程度是储层划分的重要依据。
Generally reservoir intervals are classified by the lower limit of porosity and the fracture development is an important evidence for reservoir division.
核磁共振测井在该油田的有效储层划分、流体识别、孔隙结构研究等方面发挥了重要作用。
NMR logging has been playing an important role in the effective reservoir division, fluid identification and pore configuration research in the oilfield.
在砂泥岩剖面中，泥岩往往比砂岩具有较高的自然伽马值，从而可以利用自然伽马测井将砂岩储层划分出来。
Based on the features of mudstone with higher gamma ray than sandstone in sandstone -mudstone section, we can distinguish sandstone reservoir from the drilling profiles with gamma ray log.
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