基于岩心精细刻度的成像测井解释效果分析——以伊拉克X油田混积储层为例  

Interpretation effect analysis of imaging logging based on fine core calibration:a case study of mixed rock reservoir of X Oilfield in Iraq

作　　者：伊硕 孙立春 何娟 汪洪强 王龙 汤志清 YI Shuo;SUN Lichun;HE Juan;WANG Hongqiang;WANG Long;TANG Zhiqing(CNOOC Research Institute Co.,Ltd.,Beijing 100028,China;CNOOC International Ltd.,Beijing 100028,China;Petroleum Engineering Technology Institute,Zhongyuan Oilfield Company,SINOPEC,Puyang 457001,China)

机构地区：[1]中海油研究总院有限责任公司,北京100028 [2]中国海洋石油国际有限公司,北京100028 [3]中国石化中原油田分公司石油工程技术研究院,河南濮阳457001

出　　处：《断块油气田》2020年第6期754-759,共6页Fault-Block Oil & Gas Field

基　　金：国家科技重大专项课题“海外重点油气田开发钻采关键技术”(2017ZX05032-004)。

摘　　要：成像测井广泛应用于分析井下裂缝及沉积特征,但鲜有关于成像测井解释可靠性的评价。文中以伊拉克X油田的混积储层(Upper Kirkuk组)为例,基于岩心的精细描述,对比和评价了成像测井对储层裂缝及沉积特征的响应能力。通过对4口典型井的岩心和相应的成像测井数据的比较,得出了以下结论:成像测井更适用于电阻率差异明显的岩性、层理及开启裂缝的识别,对细密的充填裂缝(尤其是闭合缝合线)的识别能力非常弱;对于混积层系成像测井裂缝识别误差来说,纯碳酸盐岩最大,碳酸盐岩型混积岩次之,砂岩及砂岩型混积岩最小。该认识利于有针对性地校准基于成像测井而获取的储层表征参数,提高成像测井评价精度,可为国内外学者利用成像测井进行定性或定量的储层评价提供参考。Imaging logging has been widely used in fracture and sedimentary facies research,while the accuracy of its evaluation lacks well documented.Based on the mixed siliciclastic-carbonate reservoir(Upper Kirkuk Formation)of X Oilfield in Iraq and its fine core description,we attempt to evaluate the ability of imaging logging to response to sedimentary and fractures features of different mixed rock reservoirs.Through the comparison of cores and corresponding imaging logging data from four typical wells,the following conclusions are drawn:imaging logging is more suitable for the identification of lithology,beddings and opening cracks with obvious differences in electrical resistance,while the recognition ability of filling fractures,especially closed stylolites,is very weak;the mismatchs of fractures in the imaging logging and cores of the mixed layers are the highest in pure carbonates,followed by carbonate-dominant mixed rocks,and the smallest in sandstone and sandstone-dominant mixed rocks.The conclusions are conductive to correct the errors and calibrate the characterization parameters obtained from the imaging logging system,so as to improve the accuracy of imaging logging evaluation,which can provide a favorable reference for the qualitative identification and quantitative evaluation of imaging logging by scholars at home and abroad.

关 键 词：成像测井 岩心 混积储层 古近系 伊拉克 

分 类 号：TE122.2[石油与天然气工程—油气勘探]