摘要
加拿大油砂资源丰富,其中位于西加拿大盆地东侧的阿萨巴斯卡矿区油砂储量最大,油砂储层发育段主要为下白垩系Mannville组McMurray段。该层段地质沉积特征比较特殊,目的层岩石中的地层水可与地表淡水和目的层之下碳酸盐岩中的高矿化度水进行交换,进而形成复杂的地层水体系,从而导致地层水矿化度纵向、横向变化大,给油砂饱和度测井评价造成困难。本文以阿萨巴斯卡矿区为目标,分析了油砂储层的岩性、物性、含油性和电性特征,建立了油砂储层参数测井评价方法,尤其是针对油砂储层矿化度无规律变化导致饱和度评价难的问题,建立了基于核磁共振测井的油砂饱和度评价新模型,并推导出了油砂储层含油饱和度计算公式。实例分析表明,本文方法能够有效计算油砂储层含油饱和度,且与岩心分析饱和度吻合较好,可推广应用。
Canada has abundant oil sand reserves,of which the Athabasca mining area,located in the east of western Canada basin,has the largest oil sand reserves.The oil sand reservoir is mainly developed in Mc-Murray Member of the Lower Cretaceous Mannville Formation,which has special geological sedimentary characteristics.The formation water in target rocks can exchange with surface fresh water and the high salinity water in carbonate rocks below the target rocks,thus a complex formation water system is formed,resulting in large vertical and horizontal variation of the formation water salinity,which makes logging evaluation of oil sand saturation difficult.Taking the Athabasca mining area as the target,this paper analyzes the lithologic,physical,oil-bearing and electrical characteristics of oil sand reservoir,and establishes the logging evaluation method of oil sand reservoir parameters.Especially,aiming at the problem that the irregular change of oil sand reservoir salinity leads to the difficulty of saturation evaluation,a new oil sand saturation evaluation model based on nuclear magnetic resonance logging is established,and the calculation formula for oil saturation of oil sand reservoir is derived.Case study shows that this method can effectively calculate the oil saturation of oil sand reservoir,and the calculated oil saturation is in good agreement with the saturation of core analysis,proving that the method can be widely used.
作者
黄涛
秦瑞宝
余杰
魏丹
HUANG Tao;QIN Ruibao;YU Jie;WEI Dan(CNOOC Research Institute Ltd.,Beijing100028,China)
出处
《中国海上油气》
CAS
CSCD
北大核心
2021年第4期54-61,共8页
China Offshore Oil and Gas
基金
中海石油(中国)有限公司科技项目“Nexen油砂有效开发地质油藏关键技术研究(编号:YXKY-2018-ZY-04)”部分研究成果。
关键词
加拿大
阿萨巴斯卡矿区
油砂
储层特征
含油饱和度
测井评价
Canada
Athabasca mining area
oil sand
reservoir characteristics
oil saturation
logging evaluation
作者简介
第一作者:黄涛,男,硕士,工程师,主要从事测井资料处理与解释。地址:北京市朝阳区太阳宫南街6号院海油大厦A座1001室(邮编:100028)。E-mail:huangtao12@cnooc.com.cn。
