摘要
新疆油田MN气田属于高压、中孔隙度、中渗透率气田,应用气测录井的皮克斯勒烃比值法、3H法、三角形图板法等常规解释方法,无法对该气田气水层及含气水层进行有效解释,且荧光录井无显示。针对此情况,通过对该气田4口井27层气测录井全烃及烃类气体组分显示特征分析,发现气层气测异常明显,全烃曲线呈箱形、组分齐全,C_1—nC_5相对含量依次降低;水层及含气水层同样气测异常明显,全烃曲线呈尖峰状,组分及组分相对含量和气层相同。针对上述问题,提出了烃类比值和烃气指数解释评价图板,为现场快速、准确评价气水层提供一种有效手段。在该气田4口井27层的应用表明,其回判解释符合率达到85%以上,效果较好。
MN Gasfield in Xinjiang Oilfield belongs to the high pressure,middle porosity and moderate permeability gasfield, in which the conventional interpretation methods, such as Pixler hydrocarbon ratio,3H and triangle chart,can 't conduct effective interpretation for gas water and gas bearing water zones,and there is also no fluorescence logging shows.In view of this condition and by the analysis of the showing features of total hydrocarbon and hydrocarbon gas composite of gas logging for 27 zones from 4 wells of the gasfield,the authors discovered that the gas logging in gas zones was clearly abnormal,total hydrocarbon curves presented box shape,the composition was complete,the relative contents of C_1-nC_5 were decreased gradually,and the gas logging in water and gas bearing water zones was also clearly abnormal,total hydrocarbon curves presented spike shape,the composition and the relative contents were similar to that of gas zones.In view of the above problems, the authors provided the hydrocarbon ratio and hydrocarbon gas index interpretation and evaluation charts,which were effective means for evaluating gas and water zones fast and accurately on wellsite.The application in 27 zones from 4 wells showed that the interpretation coincidence rate reached above 85%with better results.
出处
《录井工程》
2009年第2期11-13,52,共4页
Mud Logging Engineering
关键词
气测录井
气水层
烃类比值
显示特征
烃气指数
解释图板
符合率
gas logging
gas and water zone
hydrocarbon ratio
show feature
hydrocarbon index
interpretation chart
coincidence rate
