宽能域氯能谱测井在套后剩余油评价中的应用  

Application of Wide-Band Chlorine Spectrum Logging in Evaluation of Residual Oil in Cased Hole

作　　者：李桂山 魏宝军 张金海 寇小攀 刘东明 张玉芝 LI Guishan;WEI Baojun;ZHANG Jinhai;KOU Xiaopan;LIU Dongming;ZHANG Yuzhi(Changqing Branch,China National Logging Corporation,Xi’an,Shaanxi 710201,China;Geological Research Institute,China National Logging Corporation,Xi’an,Shaanxi 710077,China;Research Institute of Exploration and Development,Changqing Oilfield Company,PetroChina,Xi’an,Shaanxi 710016,China;Beijing Airport Economic Development Co.Ltd.,Beijing 101300,China)

机构地区：[1]中国石油集团测井有限公司长庆分公司,陕西西安710201 [2]中国石油集团测井有限公司地质研究院,陕西西安710077 [3]中国石油天然气股份有限公司长庆油田分公司勘探开发研究院,陕西西安710016 [4]北京空港经济开发有限公司,北京101300

出　　处：《测井技术》2023年第2期210-216,共7页Well Logging Technology

基　　金：中国石油勘探与生产分公司项目“复杂碎屑岩油气藏测井评价方法与技术研究”(2022KT1606)。

摘　　要：针对低渗透油田的套后饱和度测井技术较多,但是缺乏系统性、完整性研究,宽能域氯能谱测井克服和弥补了常规放射性测井方法在低孔隙度、低矿化度储层分辨率低的缺点,在长庆油田剩余油评价方面应用比较广泛。宽能域氯能谱利用自然伽马能谱曲线分析水淹情况,通过氯函数值与中子—中子孔隙度进行交会,得到研究区当前的含油饱和度,可以评价油藏剩余油及水淹状况。通过研究套后储层的岩性特征、物性特征、黏土矿物特征、含油性特征,综合利用宽能域氯能谱测井资料进行测井解释。解释结果表明,该方法在套后剩余油评价和补充完井资料方面具有较强的优势,弥补了常规中子寿命等放射性测井的不足,可提高套后剩余油解释符合率,为长庆油田低渗透油藏的剩余油挖潜提供技术支持。There are many cased hole saturation logging techniques for low permeability oilfields,but there is a lack of systematic and integrity research.The wide-band chlorine spectrum logging overcomes the shortcoming of low resolution of conventional radioactive logging in low porosity and low salinity reservoirs,and is widely used in the evaluation of remaining oil in Changqing oilfield.The wide-band chlorine spectrum logging uses the natural gamma energy spectrum curve to analyze the flooding situation,and obtains the current oil saturation of the reservoir by intersecting the chlorine function value with the neutron-neutron porosity,which can evaluate the remaining oil and flooding status of the reservoir.By studying the lithologic characteristics,physical characteristics,clay mineral characteristics and oil bearing characteristics of the reservoir behind the casing,the logging interpretation is carried out by comprehensive use of wide-band chlorine spectrum logging data.The interpretation results show that this method has a strong advantage in evaluating the remaining oil in cased hole and supplementing the completion data.It makes up for the shortcomings of conventional neutron lifetime and other radioactive logging,improves the interpretation consistency rate of the remaining oil in cased hole,and provides technical support for the potential exploration of remaining oil in low permeability reservoirs in Changqing oilfield.

关 键 词：测井解释 宽能域 氯函数 自然伽马能谱 剩余油饱和度 

分 类 号：P631.84[天文地球—地质矿产勘探]