摘要
物性和流体性质相似的火成岩储集层,其核磁共振测井资料存在较大的差异,且导致这种差异的原因尚不明确。以准噶尔盆地滴西地区石炭系火成岩为例,对3口井核磁共振测井资料的应用效果进行了分析,从铁磁性矿物含量、石英含量和泥质含量3个方面对核磁共振测井资料的应用效果差异进行了讨论。结果表明,核磁共振测井资料在研究区酸性火成岩中的应用效果要好于中基性火成岩。核磁共振测井计算的孔隙度随铁磁性矿物含量的增加而变小,随石英含量的增加而更接近地层的真实孔隙度,随泥质含量的增加而变大,孔隙度的变化量小于10%.
There are big differences among igneous reservoirs with similar physical and fluid properties, but the reason for the differences is not clear. Taking the Carboniferous igneous rocks in District Dixi of Junggar basin as an example, the paper analyzes the application effect of NMR data from 3 wells and discusses the differences of the NMR data application effect from 3 aspects such as ferromagnetic mineral content, quartz content and shale content. The result shows that the application effect of NMR data in acidic igneous rock study is better than that in intermediate-basic igneous rock study. The calculated porosity obtained from NMR logging decreases with the increase of ferromagnetic mineral content, which is closer to the actual formation porosity with the increase of quartz content and becomes larger with the increase of shale content. The variation of the porosity is less than 10% .
出处
《新疆石油地质》
CAS
CSCD
北大核心
2016年第5期593-597,共5页
Xinjiang Petroleum Geology
