摘要
塔河油田奥陶系碳酸盐岩缝洞型油藏非均质性强、油水分布规律差。部分高产井易水淹或产量大幅度递减。在生产实践中,发现部分单井在压井后,压力明显上升、可以恢复部分产量。分析奥陶系碳酸盐岩缝洞型油藏储层特征,研究注水开发的地质影响因素,并通过对注水替油的机理研究,结合现场单井注水替油和多井缝洞单元注水替油的实践,来分析选井、选层及注采参数的影响,评价注水替油开发效果,优化注水方案设计,是为了使注水开发在塔河碳酸盐岩油藏的推广应用,以便提高油田采收率。
Ordovician fractured--cavity type carbonate rock reservoirs in Tahe Oilfield have intense aeolotropism, with poor oil and water distribution laws, resulted in waterflooding or rapid oil production decline in some of high productivity wells. It was discovered in the process of production practice that after killing the well for individual wells the formation pressure in them goes up obviously, and oil production rate may recover partly. The reservoir characteristics of Ordovician fractured--cavity type carbonate rock reservoirs were analyzed and the geological factors influenced waterflooding development were investigated in this paper; through researching oil displacement mechanism by injected water, combined with the practices of oil displacement by injected water for fractured--cavity type units in single well and multiple wells, the effect of selecting well and horizon for oil displacement by injection as welt as water injection parameters on waterflooding development was analyzed. The development effect of oil displacement by water injection was evaluated and the water injection plan was optimized in the paper to enhance oil recovery ratio of fractured--cavity type carbonate rock reservoirs in Tahe Oilfield.
出处
《江汉石油职工大学学报》
2009年第6期57-60,共4页
Journal of Jianghan Petroleum University of Staff and Workers
关键词
碳酸盐岩缝洞型油气藏
注水替油
矿场试验
Fractured--cavity Type Carbonate Rock Reservoirs
Oil Displacement by Water Injection
Field Experiment
