硼中子测井解释方法研究  

Studies on boron neutron logging interpretation method

作　　者：王功军[1] 黄文新[2] 张超谟[2] 

机构地区：[1]武汉大学资源与环境科学学院,湖北武汉430072 [2]长江大学油气资源与勘探技术教育部重点实验室,湖北荆州434023

出　　处：《石油地球物理勘探》2010年第A01期210-213,共4页Oil Geophysical Prospecting

摘　　要：硼中子测井是对同一井在注硼前后进行两次测井的一种方法,其目的是根据两次测得的地层中子俘获截面差值,采用岩石体积模型,计算可动水饱和度,进而确定剩余油饱和度。本文重点研究了与可动水饱和度计算有关的参数,注硼前俘获截面与地层水矿化度有关,随着地层水矿化度的增加而增加,注硼后俘获截面不仅与地层水的矿化度有关,而且与硼酸的用量有关,随着地层水矿化度和硼酸用量的增加而急剧增加。但是注硼前后的差值只与硼酸用量有关而与地层水矿化度无关。将制作的图板应用于油田测井,计算的可动水饱和度的精度有明显的提高。Boron neutron logging is a well logging method in which the logging were respectively conducted twice before and after boron injection in a same well,based on the difference between the formation neutron capture cross section and by using of rock volume model,the movable saturation was calculated,then the residual oil saturation could be further determined.The relevant parameters in the movable water saturation calculation were paid attention and were studied in this paper,the capture cross section ∑W1 before boron injection is related to the formation water salinity,it increases with the growth of the formation water salinity,the capture cross section ∑W2 is not only related to the formation water salinity,but also related to the used amount of the boron,it increases very rapidly with the increase of the formation water salinity and used amount of the boron.However the difference between ∑W1 and ∑W2 is only related to the used amont of boron,not the formation water salinity.Through the template which was made in the studies,the method was applied in the oilfield,good results were achieved.The movable water saturation calculated in the application was seen improved a lot.

关 键 词：剩余油饱和度 俘获截面 硼酸 地层水 

分 类 号：TE151[石油与天然气工程—油气勘探]