水淹层测井解释方法综述

水淹层测井解释利用测井资料对水驱油藏水淹所发生的变化进行评价,弄清水淹部位和水淹程度,为进行二次乃至三次采油提高采收率提供依据。基于测井解释研究水淹层特性,是油田开发调整工作的重要组成部分。油层水淹后,其产层的油水饱和度分布、孔隙度与渗透率、岩石润湿性、地层水矿化度和阳离子交换能力等许多物理性质会发生较大变化。通常,可利用自然电位与电阻率曲线相结合、自然电位测井和交会图版等方法识别水淹层。进而可根据油、水等定量参数来判断储层的水淹级别。此外,动态电阻率下降法和模式识别法近来也被广泛应用于水淹等级的划分。我国在水淹层水淹机理和解释方面取得了很大的进展。但在实际中,仅仅建立在单井测井资料的水淹层测井解释仍存在一定的局限性。若以测井为纽带,将地质、地震资料有机结合起来,将在一定程度上促进测井资料解释综合应用的发展

REVIEW OF LOGGING INTERPRETATION METHODS FOR WATER- FLOODED LAYER

The log interpretation of water-flooded layer gives an evaluation for the oil field flooded by the driving water on the basis of the log data,and then confirms the position of the water-flooded layer and how the oil field is flooded,and provides the evidence for improving oil recovery for the 2nd or 3rd time.Studying on the water-flooded layers by log interpretation methods,is important work for adjusting the exploitation of the oil-field.If the oil-field was flooded,the character would be changed.Usually the water-flooded layer could be identified by the log interpretation methods such as GR and SP,i.e.and then evaluate how the oil-field was flooded by the amount of oil and water,i.e.China has had made great progress in the interpretation for water-flooded layer.But it is not enough that the interpretation is only based on one well in industry.It can be considered that the log interpretation of the water-flooded layer should be combined with the geologic and seismic data besides log data in the future.