【摘要】 根据大庆外围油藏地质特征 ,利用数值模拟方法 ,研究了水平井与直井五点法混合面积井网整体注水开发中水平井井别、水平井井筒长度、布井方向和油藏裂缝发育程度对开发效果的影响 .结果表明 :水平井用作采油井比用作注水井好 ;井网穿透比过高不利于提高采收率 ,穿透比为 0 .5～ 0 .6比较好 ;随着裂缝间距的增加 ,水平井见水时间越来越短 ,油田开采时间增长 ,油藏最终采收率变低 ;对裂缝性油藏布井时 ,应采用水平井垂直于裂缝方向即最大主应力方向更多还原

【Abstract】 According to the geology characteristics of the peripheral Daqing oilfield, some influence factors to the mixed well pattern of 5-spot are studied with numerical simulation method. The influence factors are horizontal well as production well or injection well, horizontal well length, pattern direction in due porosity reservoir and fracture development degree. The results show that (1) Horizontal wells as production wells are better than those as a injection wells. (2) The fraction of well spacing at range of 0.5 to 0.6 is suitable for enhanced oil recovery, fraction of well spacing bigger than o.6 is not good for oilfield production. (3) With the increase of the space between fractures, the time of water break-though of horizontal wells becomes shorter, the period of oilfield production becomes longer and the oilfield oil recovery becomes lower; (4) The horizontal well direction should be vertical to the direction of nature fractures.更多还原