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随着世界范围内的油价高增以及对新油气田的加速开发,阿根廷目前的油田发现速度已不能满足开采速度的需要;再者,阿根廷老油田逐步增多.因此,许多石油公司将提高油藏采收率作为延长现存资源可利用时间的策略。径向钻孔技术可能是提高油藏采收率的一个工作方向。尽管该技术在国内从未应用而存在一定的不确定性,但可用于现有井从而成为低成本投入的发展方向。该技术可钻长达100 m的小直径径向水平孔,在每个产层钻好几个小直径径向水平孔也是可能的。径向钻孔分为两步:首先用(3/4)in(1 in=25.4 mm)的铣刀磨穿套管,然后通过高压水力喷射实现径向扩展。为使试验涵盖较多的可能情况并得到最好的试验效果,在几个不同油田进行了先导性试验来评价该项技术。
With the surge in oil prices worldwide and the accelerated development of new oil and gas fields, the current rate of discovery of oil fields in Argentina can no longer meet the demand of mining; in addition, the number of old oil fields in Argentina is gradually increasing. Therefore, many oil companies will increase their oil recovery Yield as a strategy to extend the time available for existing resources. Radial drilling technology may be a working direction to improve oil recovery. Although the technology has never been used in China and there is a certain degree of uncertainty, but can be used in existing wells and thus become a low-cost investment in the development. This technique allows the drilling of small diameter radial horizontal holes of up to 100 m, and it is also possible to drill several small diameter radial horizontal holes in each pay zone. Radial drilling is a two-step process: first wear the sleeve with a (3/4) in (1 in = 25.4 mm) cutter and then expand radially with a high-pressure water jet. In order to make the test cover more possibilities and to get the best test results, pilot tests were conducted in several different fields to evaluate the technology.