底水油藏的水平井开发

结合新疆塔里木盆地某底水油藏实例,开展了利用水平井和直井开发底水油藏的对比研究,证实水平井开发底水油藏优于直井。在此基础上,提出了利用实际生产资料计算水平井临界产量和临界井底流压的新方法,并从油藏工程、物理实验和油藏数值模拟等不同角度研究了水平井开发底水油藏的开发方式。研究表明:利用水平井开发底水油藏应当重视水平渗透率和垂向渗透率的影响;不同初配产对开发效果的影响不同,如果油井的初配产小于油井的临界产量的3～5倍范围内,减小初配产能够明显改善开发效果;如果油井的初配产远远大于油井的临界产量,增加或减小油井的初配产对开发效果的影响不大。水平井的水平段应当控制在油层相对厚度的70～90。。

DEVELOPING BOTTOM WATER POOLS WITH HORIZONTAL WELL

Taking a water bottom reservoir in Tarim Basin as an example,the results of developing the reservoir with horizontal well and vertical well are compared and studied in this paper.The results prove that horizontal well development is superior to the vertical well development.Then the mode of developing the reservoir with horizontal well according to reservoir engineering,physical test and reservoir numeric simulation were studied.A new method of calculating critical production and critical bettom flowing is proposed.It is suggested that,in developing water bottom reservoir with horizontal well,one should pay attention to the effect of horizontal and vertical permeability,and that different primary allocations may have different effects on developing results.The horizontal section of the horizontal well should be limited within 70%～90% of the relative thickness of oil layer.