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新方法对于巴西海上油田开发,尤其是超深海中的稠油油井,水平井段长达1000～2000m来说,无疑是油田开发的经济型驱动器。这些井的几何形状保证了有效的油藏泄流,维持了稠油油田的合理生产指数。在这些井中,大部分是较低的破裂压力梯度。众所周知,砾石充填施工期间的动态压力可以轻而易举地克服底层破裂压力。为完成这项任务并且避免地层伤害,提出了一种新方法,在β波阶段,有较大幅度的压力增长,此时泵入轻质支撑剂。本文展示了采用两种支撑剂进行砾石充填完井施工设计的计算机模拟。
The new method is an economic driver for the development of offshore oil fields in Brazil, especially heavy oil wells in the ultra-deep sea, with horizontal wells of up to 1000-2000 m. The geometry of these wells ensures effective reservoir drainage and maintains a reasonable production index for heavy oil fields. In these wells, the majority are lower fracture pressure gradients. It is well-known that the dynamic pressure during the gravel pack construction can easily overcome the underlying burst pressure. In order to accomplish this task and to avoid formation damage, a new method is proposed, where there is more pressure increase during the beta wave phase, when light proppant is pumped. This paper presents a computer simulation of the completion design of a gravel pack with two proppants.