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首页> 美国卫生研究院文献>The Scientific World Journal >Genesis Analysis of High-Gamma Ray Sandstone Reservoir and Its Log Evaluation Techniques: A Case Study from the Junggar Basin Northwest China
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Genesis Analysis of High-Gamma Ray Sandstone Reservoir and Its Log Evaluation Techniques: A Case Study from the Junggar Basin Northwest China

机译：高伽玛射线砂岩储层成因分析及测井评价技术-以西北准gar尔盆地为例

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摘要

In the Junggar basin, northwest China, many high gamma-ray (GR) sandstone reservoirs are found and routinely interpreted as mudstone non-reservoirs, with negative implications for the exploration and exploitation of oil and gas. Then, the high GR sandstone reservoirs' recognition principles, genesis, and log evaluation techniques are systematically studied. Studies show that the sandstone reservoirs with apparent shale content greater than 50% and GR value higher than 110API can be regarded as high GR sandstone reservoir. The high GR sandstone reservoir is mainly and directly caused by abnormally high uranium enrichment, but not the tuff, feldspar or clay mineral. Affected by formation's high water sensitivity and poor borehole quality, the conventional logs can not recognize reservoir and evaluate the physical property of reservoirs. Then, the nuclear magnetic resonance (NMR) logs is proposed and proved to be useful in reservoir recognition and physical property evaluation.
机译：在中国西北部的准gar尔盆地，发现了许多高伽玛射线（GR）砂岩储层，并通常将其解释为泥岩非储层，这对油气的勘探和开发具有负面影响。然后，系统地研究了高GR砂岩储层的识别原理，成因和测井评价技术。研究表明，表观页岩含量大于50％，GR值大于110API的砂岩油藏可以视为高GR砂岩油藏。 GR砂岩储层高是铀异常富集的主要直接原因，而不是凝灰岩，长石或粘土矿物。受地层对水的敏感性高和井眼质量差的影响，常规测井无法识别储层，无法评价储层的物性。然后，提出了核磁共振（NMR）测井资料，并证明其可用于储层识别和物性评估。

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