论文部分内容阅读
在三大洲的油气井增产作业中,一项比较新的增产技术——水力射流压裂在水平井完井中取得了很大的成功。起初,这一多级压裂增产技术使用连接管柱以达到水力压裂所需的注入速度。最近,大外径连续油管被引进水力压裂施工中,这提高了施工操作的灵活性,减少了工作时间,并且大大提高了健康、安全、环境管理体系的实施效果,它还可以减少一些操作的施工成本。2003年以前,这一施工过程中的大多数输送式连续油管的应用主要限于协助水力射流向地层注入酸液,但只有较低的酸化压裂处理效果。通过应用大外径的连续油管,压裂处理的深度已达到大约8000ft,酸化速度达到10bbl/min。与表面连续油管相连、由连接管柱组成的综合工作管柱的应用可在更深的油藏中实现多级压裂,压裂处理深度可提高1～2倍。在许多应用中,这将会使只有几千英尺深的油井既有连续油管施工的灵活性、快捷性和安全性,又使连接管柱免受地面高的工作压力。本文回顾了几个连续油管在油田水力射流压裂过程中的应用实例。其中一个例子比较了同一油藏中应用连续油管与应用连接管柱进行压裂的不同效果。
In oil and gas well stimulation operations on three continents, a relatively new stimulation technology - hydraulic jet fracturing has achieved great success in horizontal well completion. Initially, this multi-stage fracturing stimulation technology used connecting columns to achieve the required injection rate for hydraulic fracturing. Lately, large-diameter coiled tubing has been introduced into hydraulic fracking, which increases the flexibility of construction operations, reduces working hours and greatly enhances the effectiveness of health, safety and environmental management systems. It also reduces some operations Construction costs. Prior to 2003, the majority of delivery coiled tubing applications during this construction were mainly limited to assisting hydraulic jets to inject acid into the formation, but with only low acid fracturing treatment effectiveness. By applying a coiled tubing with a large outer diameter, fracturing depths have reached approximately 8,000 ft and acidification rates have reached 10bbl / min. Connected to the surface coiled tubing, the application of an integrated working column consisting of connecting tubing can achieve multi-stage fracturing in deeper reservoirs, increasing the depth of fracturing by one to two times. In many applications, this will result in the flexibility, speed and safety of existing coiled tubing construction in wells only up to several thousand feet deep, while keeping the connecting column free from high operating pressures on the ground. This article reviews several coiled tubing applications in the field of hydraulic jet fracturing. One example compares the different effects of fracturing a coiled tubing with a connecting tubing string in the same reservoir.