摘要
吐哈盆地温米油田侏罗系三间房组含油井段长、储层差异大、油水粘度比低、注采井网不完善,已进入高含水开发阶段,面临着油层水淹差别大、储量损失大、产量递减快、开发效益差等问题。通过储层沉积成因分析及各向异性精细刻画,结合储层水驱油机理、生产动态和钻井资料,分析油层的水淹特点和规律,总结出该区剩余油分布规律。提出轻质油藏高含水期应根据储层规模和剩余油储量丰度来优化井网重组层系,完善注采关系,最大限度提高水驱动用程度;颗粒或凝胶类深部调驱体系对改善人工裂缝不发育井区的水驱效果不明显;高含水后期应侧重于转换开发方式提高驱替剂的波及体积和驱油效率,气水交注或顶部注气稳定重力驱能较大幅度提高采收率。
Wenmi oilfield Jurassic Sanjianfang formation contains long oil interval with high variable reservoir feature and low oil water viscosity ratio, therefore, the injection-production network is not perfect. Entering into the high water-cut stage, the oilfield faces problems such as reservoir reserves loss and rapid production decline. Through the sedimentary origin and reservoir anisotropic description, and combined the reservoir water flooding mechanism with the dynamic production and drilling data, as well as the analysis of water flooded zone characteristic and the rule, this area is summarized with respect to the distribution rule of remaining oil. According to the reservoir characteristics, we propose that, in high water cut stage, well pattern reorganization layer system should be optimized based on the reservoir size and abundance of remaining reserves, so as to perfect the injection-production patterns, and maximize the producing efficiency of water flooding. However, the particles or gel for deep profile control system do not improve the performance of less fracture developed zone. In the high water-cut stage, it should focus on the conversion of development scheme for increasing oil displacement agent of swept volume and oil displacement efficiency, moreover, the gas water alternate injection and top gas injection gravity stability drive can greatly improve the oil recovery.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2012年第5期104-107,118,共4页
Petroleum Geology and Recovery Efficiency
基金
中国石油天然气股份公司二次开发重大项目"温米油田二次开发方案研究"(2008B-1201)
