补偿中子测井估计油气流体密度  

Estimating Fluid Density of Oil and Gas with Compensated Neutron Logs

作　　者：胡年友[1] 韩桂芹 黄大琴 王运洪[1] 卢晓丽[1] 赵汉[1] 

机构地区：[1]河南石油勘探局测井公司,河南南阳473132 [2]中油测井技术服务有限公司,CNPC,北京100724

出　　处：《测井技术》2004年第3期209-213,共5页Well Logging Technology

摘　　要：用补偿中子含氢指数测井方法估计地层油气流体密度是其应用的新领域。提出油气流体密度与它的含氢指数的新方程、给出冲洗带含水饱和度、流体密度、地层孔隙度对补偿中子测井响应的影响 ,指出用补偿中子测井响应识别流体性质有它的灵敏区和盲区 ,提倡在下套管后测量补偿中子测井以提高它的识别油气层的能力。提出补偿中子测井对油气层有特别的附加效应 ,利用它在定性识别油气层、定量计算油气流体密度等方面的应用见到好的效果 ;计算油气层流体密度发现在块状厚油层内油气密度分布是不均的 ,往往在厚油层底部或在油水界面附近有高密度的原油分布。The compensated neutron log is a preferable method to indicate the hydrogen content index of the formation, which is used to identify the natural gas zones, estimate the shale content of the formation and calculate the porosity of the pure water beds. A new equation is given between the fluid density and the hydrogen content index; and studied is the influence of the water saturation, fluid density and porosity in the flushed zones on the compensated neutron logs. Further more, the compensated neutron log response can be used to identify both the sensitive areas and blind areas in the flushed zones, so it is better to run a compensated neutron log in cased wells to increase its ability to identify the oil and the natural gas zones. The compensated neutron log has a special additional effect on the oil and gas zones which can be used to indicate these zones qualitatively, and calculate the fluid density quantitatively. Calculation shows the distribution of the natural fluid density is not homogeneous in thick blocked oil beds. And high density crude oil generally distributes at the bottom of the thick oil beds or near the oil-gas interfaces.

关 键 词：补偿中子测井 含氢指数 附加效应 流体密度 含水饱和度 油气层识别 

分 类 号：P631.817[天文地球—地质矿产勘探] TE132.14[天文地球—地质学]