气测录井三角形图板法的解析及拓展应用尝试  

Analysis and expanding application for gas logging triangle method

作　　者：余明发 吴国海 简笑鹰 郭海峰 庄维 张春伟 

机构地区：[1]中国石油长城钻探工程公司解释研究中心 [2]中石化中原石油工程有限公司录井公司

出　　处：《录井工程》2015年第3期17-23,104-105,共7页Mud Logging Engineering

基　　金：中国石油天然气集团公司科学研究与技术开发项目"海外重点战略大区勘探技术研究与实践"(编号:2014D-0907)

摘　　要：三角形图板法作为气测录井的经典解释方法之一,多年来在定性解释评价储集层流体性质和判断储集层产出能力方面发挥了重要作用。但由于该图板形式的约束,仅限于烃组分齐全的条件下应用且制作过程繁琐,不能随井深的变化连续反映储集层流体性质。为了解决该问题,以有关文献对三角形图板解析所得出的三角图板指数Q和价值区的M点坐标(x,y)为基础,在将三角图板指数随钻成图显示的条件下,分别探讨了该指数和M点坐标的应用意义与价值,认为通过公式计算后的三角图板指数Q可反映储集层的流体性质,而由其衍生的随钻三角图板指数IT以及系列指数ITn同样具有原指数的作用,但M点坐标在反映储集层是否具有产出能力方面意义不大,而将三角图板指数与全烃结合反映产出能力效果更好。对三角形图板法的关键性指标——储集层流体性质和产出能力的解析与拓展应用尝试,为该图板法从单点定性解释到随井深变化连续定量解释奠定了基础,进而为录井资料的数字化解释创造了条件。As one of the classic gas logging interpretation methods,triangle method has played an important role in qualitatively interpreting and evaluating reservoir fluid properties and judging reservoir production capacity for many years.Because of the restriction of the chart form,it can only be used under the condition of complete hydrocarbon component,there were a number of difficulties during making the chart,the chart cannot continuously reflect reservoir fluid properties by the change of well depth.To solve this problem,on the basis of the related literatures about the triangle chart index Qand M point coordinates(x,y)in the value area got from the analysis on the triangle chart,under the condition that the triangle chart index will be map display with drilling,the authors discussed the application significance and value of Qindex and M point coordinates respectively,considered the triangle chart index Q,which was calculated by using the formula,can reflect the reservoir fluid properties.Drilling triangle chart index ITand series index ITnwere derived from index Q and also have the function of the original index,but M point coordinates have little significance in reflecting the reservoir productive capacity,while the triangle chart index combining with total hydrocarbon can better reflect the productive capacity.The key indicator of the triangle method —analysis and expand application for reservoir fluid properties and productive capacity,laid a foundation from quantitative interpretation at single point to continuously quantitative interpretation with well depth changes,and then created conditions for the digital interpretation of mud logging data.

关 键 词：气测录井 三角图板指数 井深 价值点坐标 储集层 流体性质 

分 类 号：TE132.1[石油与天然气工程—油气勘探]