断块油藏高部位剩余油径向钻孔产能预测

发布时间：2018-09-17 19:15

【摘要】：在当前低油价形势下,费用低、时间短、效率高的径向钻孔技术受到油田重视。针对断块油藏断裂系统复杂、类型多、高部位剩余油常规开发难度大且效果差的现状,提出利用径向钻孔技术来实现对断块油藏高部位剩余油的有效开采。根据镜像反映和势叠加原理,得到径向钻孔势的表达式和孔内流动方程,通过耦合得到径向钻孔产能预测模型,并对其准确性进行验证。结果表明:径向钻孔能够实现对断块油藏高部位剩余油的经济有效开采;新建模型计算产量与数值模拟产量的误差小于10%,说明所建产能公式可用于预测断块油藏径向钻孔的产能;径向钻孔长度越长,其增产效果越明显;垂向多分支开采效果随油层厚度的增加而变好;随着油层厚度的增加,采油指数不断减小,径向钻孔技术更适用于薄油层开采。
[Abstract]:In the current situation of low oil price, the radial drilling technology with low cost, short time and high efficiency has been paid attention to by oil field. In view of the complex fault system, many types of fault system in fault-block reservoir, and the difficulty and poor effect of conventional development of residual oil in high position, a radial drilling technique is put forward to realize the effective exploitation of remaining oil in high position of fault-block reservoir. According to the principle of mirror reflection and potential superposition, the expression of radial borehole potential and the flow equation in the hole are obtained, and the prediction model of radial borehole productivity is obtained by coupling, and its accuracy is verified. The results show that radial drilling can realize economic and effective recovery of remaining oil in high position of fault block reservoir. The error between the new model and numerical simulation is less than 10, which indicates that the productivity formula can be used to predict the productivity of radial borehole in faulted reservoir, and the longer the length of radial borehole is, the more obvious the effect of increasing production is. The vertical multi-branch production effect becomes better with the increase of reservoir thickness, and with the increase of reservoir thickness, the oil recovery index decreases continuously, and the radial drilling technology is more suitable for thin reservoir production.
【作者单位】：中国石油大学(华东)石油工程学院;中国石化胜利油田分公司勘探开发研究院;中国石油华北油田分公司勘探开发研究院;
【基金】：国家科技重大专项“复杂断块油田提高采收率技术”(2016ZX05011-002)
【分类号】：TE328

【相似文献】