伊拉克BU油田碳酸盐岩储层沉积过程数值模拟  

Numerical simulation of sedimentary process for carbonate reservoir in BU Oilfield,Iraq

作　　者：王鹏飞 霍春亮 叶小明 刘卫林 徐静 WANG Pengfei;HUO Chunliang;YE Xiaoming;LIU Weilin;XU Jing(Tianjin Branch Company,CNOOC Ltd.,Tianjin City,300459,China)

机构地区：[1]中海石油(中国)有限公司天津分公司

出　　处：《油气地质与采收率》2019年第4期56-61,共6页Petroleum Geology and Recovery Efficiency

摘　　要：综合利用岩心、地震、测井及分析化验等资料,分析BU油田碳酸盐岩沉积环境的控制因素,开展储层沉积过程数值模拟研究,定量表征不同沉积时期储层展布范围及沉积演化规律。研究结果表明,碳酸盐岩储层沉积过程数值模拟的可容空间变化、碳酸盐岩产率等环境参数对储层分布范围的影响较大。BU油田Mishirif组MB2^1段纵向上分为Ⅰ—Ⅵ共6个小层,高能沉积带与低能沉积带交替出现,其中高能沉积带岩性主要为颗粒灰岩,在顶部Ⅰ小层较发育,而低能沉积带岩性主要为泥晶灰岩,并有高角度微裂缝发育,在Ⅵ小层底部发育。该研究成果为BU油田底注顶采的注水开发方案提供地质依据,已完成4口井方案实施,恢复了地层压力,缓解了局部压力亏空现象,整体日产油能力提高近19%,达0.94×10^4m^3/d。Based on the core,seismic,logging and experiment data,the control factors of sedimentary environment were analyzed,and the numerical simulation of reservoir sedimentary process was carried out to quantitatively characterize the reservoir distribution and evolution at different stages. The study results show that the initial parameters of numerical simulation of carbonate reservoir sedimentary process have a great influence on the reservoir distribution,and main parameters include accommodating space change,carbonate productivity,etc. In the vertical direction of BU Oilfield,the MB2^1 Member of Mishirif Formation can be divided into 6 layers includingⅠ-Ⅵ. High-energy sedimentary belt and low-energy sedimentary belt appear alternately. The lithology of high-energy sedimentary belt is mainly grain limestone on the top of LayerⅠ, while the lithology of low-energy sedimentary belt is mainly micrite limestone with micro-fracture on the bottom of Layer Ⅵ. The research results provide the geologic basis for the water injection development scheme of bottom injection and top production in BU Oilfield. Four wells have been drilled to build up the formation pressure and to alleviate the local pressure deficit,and the daily production rate of the Oilfield has increased by nearly 19%,and increases to 0.94×10^4 m^3/d.

关 键 词：碳酸盐岩 沉积过程数值模拟 可容空间 碳酸盐岩产率 BU油田 米桑油田群 

分 类 号：TE122.2[石油与天然气工程—油气勘探]