三维定量荧光录井技术在乌石凹陷油层评价中的应用  

Application of 3D quantitative fluorescence logging technology in reservoir evaluation of Wushi Sag

作　　者：付大巍 宫立园 胡德胜 张帅 陈奎 FU Dawei;GONG Liyuan;HU Desheng;ZHANG Shuai;CHEN Kui(Zhanjiang Branch,CNOOC China Limited,Zhanjiang,Guangdong 524057,China;Hainan Branch,CNOOC China Limited,Haikou,Hainan 570312,China)

机构地区：[1]中海石油(中国)有限公司湛江分公司 [2]中海石油(中国)有限公司海南分公司

出　　处：《录井工程》2023年第1期54-59,共6页Mud Logging Engineering

摘　　要：针对乌石凹陷原油品质差异大、部分井钻井施工采用高荧光钻井液,常规录井难以有效识别真假油气显示及判断储层流体性质的问题,利用三维定量荧光录井技术取得该区不同品质原油样品的最佳激发波长和发射波长及油性指数,建立不同品质原油识别标准,通过油性指数、相当油含量、对比级别等三维定量荧光参数与气测录井数据结合,建立了储层流体性质判别图板。应用该图板可快速判断原油品质,并有效识别真假油气及微弱油气显示,其对储层流体性质的解释结果与实际测试及取样结果吻合率达92%,有效提高了录井对油气层的快速判断能力。In view of large differences in crude oil quality,high fluorescence drilling fluids are used for drilling construction of some wells in Wushi Sag,which makes it difficult for conventional mud logging to effectively identify true or false oil and gas shows and judge the properties of reservoir fluids.This paper uses 3D quantitative fluorescence logging technology to obtain the best excitation wavelength,emission wavelength and oiliness index of crude oil samples of different quality in this area,and establishes the identification standards for crude oil with different qualities.The 3D quantitative fluorescence parameters such as oiliness index,equivalent oil content,and contrast level are combined with gas logging data to establish a discrimination chart of reservoir fluid properties.In application,it can quickly judge the quality of crude oil,and effectively identify true or false oil and gas and weak oil and gas shows.The coincidence rate between the results of reservoir fluid properties interpreted by the chart method and the results of actual tests and samplings is 92%,effectively improving the rapid judgment ability of mud logging for oil and gas layers.

关 键 词：三维定量荧光 录井技术 乌石凹陷 流体性质 

分 类 号：TE132.1[石油与天然气工程—油气勘探]