摘要
低孔低渗储层成因复杂,孔隙类型多样,连通性差,导致部分测井信息对地层的反映失真,干扰了储层与干层的划分和油气层的识别。为此提出了识别油层和气层的指标判别法。首先基于常规测井曲线提取各类判别指标——利用自然伽马测井曲线提取储层的判别指标,利用自然电位测井曲线提取产层的判别指标,综合电阻率和声波测井曲线提取油层的判别指标,通过三孔隙度测井曲线提取气层的判别指标;然后基于这些判别指标提出了识别油层和气层的综合指标,该综合指标能够突出储层流体的测井响应。实际应用表明,利用该方法可以有效地区分油层和气层。
The low porosity & permeability reservoir has the characteris- tics of complicated genetics,multi types of pore and poor connec- tivity,which leads to the distortion of partial logging on formation and disturbs the classification of reservoirs and non-reservoir and the recognition of reservoirs.Therefore,an index identification method for recognizing oil layer and gas layer was proposed.First- ly,all discriminant indexes are extracted from conventional log, that is extracting discriminant indexes of reservoir from gamma ray log,extracting discriminant indexes of productive layers from natu- ral potential log,extracting discriminant indexes of oil layers from synthetic resistivity and acoustic log,extracting discriminant inde- xes of gas layers from three porosity log.Then,the synthetic in- dex for recognizing oil layers and gas layers were proposed based on the indexes.The synthetic index can stress the logging response of reservoir fluid.Actual application shows that the method can effec- tively distinguish oil layer and gas layer.
出处
《石油物探》
EI
CSCD
北大核心
2009年第1期57-60,共4页
Geophysical Prospecting For Petroleum
关键词
低孔低渗储层
常规测井曲线
油层
气层
判别指标
low porosity & permeability reservoir
conventional log
oil layer
gas layer
discriminant index
