摘要
中国低渗油藏潜力巨大,受控于地下储层特性及开发技术水平,目前采出程度偏低。以东营凹陷H67块沙二段的低渗透岩性油藏为例,运用地震、测井、岩芯、分析化验及生产动态资料,分析了低渗透岩性油藏的储层非均质性特征,描述了其对注水开发的影响,阐明了剩余油的分布规律。研究表明,低渗透油藏储层孔喉半径小,平面与层内非均质性强,主要体现在稳定展布的夹层及韵律砂层渗透性相差大,平面上砂体及物性展布有明显的方向性;受控于储层非均质性,低渗透岩性油藏注水开发中存在地层能量不足、单井日液量低及平面水驱不均衡等特点,水驱后剩余油储量丰度依然较大,剩余油主要富集在层内及平面储层厚度大、物性差的区域。以上成果及认识对低渗透岩性油藏的开发具有重要的指导意义。
The potential of low permeability reservoir in China is huge,which is controlled by the characteristics of underground reservoir and the level of development technology.Taking the low permeability lithologic reservoir of Sha-2 Member(Sand Ⅱ),Block H67,Dongying Sag as an example,the reservoir heterogeneity characteristics of the low permeability lithologic reservoir were analyzed by seismic,logging,core analysis,and dynamic production data.The heterogeneity characteristics of low permeability lithologic reservoirs were analyzed,and its influence on water injection development was described.Results show that the pore radius of low permeability reservoir is small,and the heterogeneity of materials between at-plane and in-layer is strong as indicated by a large difference in permeability between stably distributed interlayer and rhythmic sand layer,and the horizontal distribution of physical property of the sand body presented obvious directivity.Affected by reservoir heterogeneity,the water injection development of low-permeability lithological reservoirs was characteristic of insufficient stratigraphic energy,low daily fluid volume per well,and uneven horizontal water injection,while the remaining oil reserves after water injection remains abundant.The remained oil is concentrated in mainly the reservoir layers and areas with large reservoir thickness and poor physical properties.The above results and understanding have important guiding significance for the development of low-permeability lithological reservoirs.
作者
王春伟
韩淑乔
杜焕福
杨勇
孙鑫
董佑桓
刘继水
边旭
WANG Chunwei;HAN Shuqiao;DU Huanfu;YANG Yong;SUN Xin;DONG Youhuan;LIU Jishui;BIAN Xu(Geosteering and Logging Research Institute,Sinopec Matrix Co.,Ltd.,Qingdao 266003,China;No.3 Oil Production Plant,PetroChina Changqing Oilfield Company,Yinchuan 750006,China;The Fifth Prospecting Team,Shandong Bureau of Coal Geology,Jinan 250100,China;Zhongsheng Petroleum Development Co.,Ltd.,Shengli Oilfield,Dongying 257000,China)
出处
《海洋地质前沿》
CSCD
北大核心
2024年第1期36-43,共8页
Marine Geology Frontiers
基金
国家重点研发计划项目“油/水/固界面浸润调控智能流体提高采收率关键材料与机理研究”(2019YFA0708700)
中石化经纬有限公司重点项目“定测录导一体化”(JWKY2105)。
关键词
低渗透
岩性油藏
储层非均质性
注水开发
剩余油
东营凹陷
low permeability
lithologic reservoir
reservoir heterogeneity
water injection development
residual oil
Dongying Sag
