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首页> 外文会议>International Association of Drilling Contractors/Society of Petroleum Engineers Asia Pacific Drilling Technology Conference >The New Development of Multi-stage Fracturing Technology of Multilayer Vertical gas Wells In Sulige Tight Gas Field
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The New Development of Multi-stage Fracturing Technology of Multilayer Vertical gas Wells In Sulige Tight Gas Field

机译：苏里格紧气田多层垂直气井多级压裂技术的新发展

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In Changqing gas field, it is very usual that a gas well contains many gas bearing beds, whose property is different with each other. Because of the low formation pressure and low permeability, the nature rate is so small that every well must be treated. However, when treating these multi-layer wells, the conventional separate fracturing is not effective or cost-effective, and needs long time. To make all the beds treated effectively, to improve individual well producing rate and enhance economic benefit, optimizing several kinds of separate layer treatment technology and analyzing the feasibility of commingled producing in Changqing gas field. In 2005, a new completion string has been introduced, which is achieved by plugging of the packers and opening of the sand blast sleeve. Using this technology and completion string, three formations can be fractured continuously, but needn’t kill well. Firstly, perforating all the three gas layers at a time, at the same time assembling the completion string, then tripping it in the gas well; secondly, launching a ball to make packers set down, and fracturing the lower most layer; thirdly, launching a ball again to open the upper sand blast sleeve so that the upper layer is connected with the tubing and isolated with the sub layer, so the second layer can be fractured. Similarly, and the last layer can be treated like this step. Finally, when all the layers have been treated, unloading liquids of all layers, blowouting and producing. During fracturing, if sand plug happens, it can be solved by reverse washing. The strong point of this technology is that all the processes are made in the same string and needn’t exchange string. From 2006 to 2009, the separate fracturing string with packers has been used more than 2000 vertical wells that cover 2 or 3 payer-beddings. However, there are more and more vertical wells that contain far more than 3 layers, even to eight layers. So it is necessary to develop the separate layer string for fracturing at least 4 layers. This paper describes how to achieve this aim by intrducing new tecnnologies such as TAP fracturing technology, coiled tubing fracturing technology and modifing the initial fracturing string so that eight layers can be fractured with only one trip.
机译：在长青天然气场中，气井含有许多气体床，其性质彼此不同。由于较低的形成压力和低渗透性，自然速率如此小，因此每种孔都必须处理。然而，当处理这些多层孔时，常规的单独压裂不有效或性价比，并且需要很长时间。要使所有床有效治疗，以提高个性良好的生产率，提高经济效益，优化几种单独的层处理技术，并分析了长庆气田混合生产的可行性。 2005年，介绍了一种新的完井串，这是通过堵塞封装机和打开砂喷砂套筒来实现的。使用这项技术和完成字符串，可以持续破坏三个展示，但不需要良好杀死。首先，一次穿过所有三个气体层，同时组装完成绳，然后在气体井中拖出它;其次，发射一个球，使包装器设置下来，并破裂最低的层;第三，再次发射球以打开上砂套筒，使得上层与管道连接并与子层隔离，因此第二层可以破裂。同样，并且最后一层可以像该步骤一样对待。最后，当所有层都经过处理时，卸下所有层的液体，井喷和生产。在压裂过程中，如果发生沙塞，可以通过反向洗涤解决。这项技术的强烈点是所有进程都在相同的字符串中进行，不必交换字符串。从2006年到2009年，带有包装机的单独压裂串已被使用2000多个垂直井，覆盖2或3个付款人床上用品。然而，越来越多的垂直孔，含有超过3层，甚至到八层。因此，有必要开发用于压裂至少4层的单独的层串。本文介绍了如何通过引入新的Tecnologies，如Tap Fracture技术，卷材管压裂技术，修改初始压裂柱，使初始断裂绳进行介绍，使八层只有一次跳闸。

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