红河油田长8致密碎屑岩储层流体识别综合研究

红河油田延长组长8油层组为低孔低渗致密碎屑岩储集层,孔隙结构复杂、物性差、非均质性强,储层微孔隙发育、束缚水饱和度高,导致电阻率测井对流体的辨识能力较弱,低阻油层、水层误判现象频出。针对研究区致密碎屑岩储层特点,立足测井资料,综合运用测试、地质分析等资料,采用视地层水电阻率比值法、可动水分析法、核磁共振差谱法等方法开展了碎屑岩致密储层测井流体识别及适用性分析综合研究,取得良好效果。

Comprehensive study on fluid identification of Chang-8 tight clastic reservoirs in Honghe oilfield

Chang-8 oil reservoirs of Yanchang formation in Honghe oilfield are tight clastic reservoir,with low porosity and low permeability,it has the characteristics of complex pore structure,poor physical properties,strong heterogeneity,developed micro- porosity and high irreducible water saturation.Therefore,the fluid identification capability of resistivity logging is low.and there is frequent misjudgment phenomenon of low resistivity reservoirs and the water layers.In view of the tight clastic reservoir characteristics,based on logging data,by integrated use of testing,analysis and other geological data,the use of visual formation water resistivity ratio method,movable water analysis,nuclear magnetic resonance spectroscopy and other methods have been applied to carry out comprehensive study on fluid identification of Chang- 8 tight clastic reservoirs in Honghe oilfield and in the end,good results have been achieved.