核磁共振测井在江汉特殊储层解释评价中的应用

NMR Log Application in Special Reservoir Evaluation of Jianghan Area

利用核磁共振测井技术开展对江汉地区盐间非砂岩储层、低孔低渗砂岩储层的测井评价,建立了各类特殊储层的核磁测井响应特征和核磁评价标准。对于盐间非砂岩储层,核磁测井T2谱能较准确地判别出储层的孔隙结构、可动流体和渗透性特征,进而结合电成像资料区分储集类型与划分有效储层。在低孔、低渗砂岩储层中,利用核磁T2谱、差谱、移谱信号特征建立了低渗透水层、低渗透差油层核磁响应模式。

The logging evaluating for saline un-sandstone reservoir bed and low-porosity and low permeability sandstone reservoir of Jianghan area was done by using nuclear magnetic resonance logging technique,the NMR response character and NMR evaluating standard for all kind of reservoirs were developed.The T2 spectrometry of NMR logging technique can exactly distinguish the pore structure,flowable fluid and permeable characters of the reservoir bed,which can be combined of electric image forming data to be use to distinguish the kind of reservoir and classify the valid reservoir bed.The NMR response model of low permeable water layer,low permeable oil layer were developed by using signal characters of nuclear magnetic T2 spectrometry,difference spectrometry and movable spectrometry in low-porosity and low-permeability reservoir.