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首页> 外文会议>SPE Russian Petroleum Technology Conference and Exhibition >New Vision: IC TAML5 Wells on Caspian Offshore. Reasons, Implementation and Results
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New Vision: IC TAML5 Wells on Caspian Offshore. Reasons, Implementation and Results

机译：新愿景：Caspian离岸的IC Taml5 Wells。 原因，实施和结果

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In 2015, LUKOIL-Nizhnevolzhskneft developed two intelligent multilateral (TAML 5) wells in the Korchagina field in the Caspian Sea—a first for LUKOIL and Schlumberger, the company's service provider. The development of offshore fields is difficult, requiring nonstandard procedures and solutions, including the use of new technologies to construct multilateral wells. This paper describes the approach to designing these wells with TAML 5 intelligent completions in conditions where there is a high risk of gas and water breakthrough. The main objectives for this type of completion were extending the production period before catastrophic gas breakthrough, increasing the drainage area by drilling several drains, and, as a result, increasing total oil recovery. The formation of Korchagina field is an oil rim with height of 20 m located between the massive (up to 90 m) gas cap and bottom edge water. In the majority of wells (usually extended-reach drilling (ERD) wells), the first three months of production see gas breakthrough, drops in oil production, and the gas/oil ratio (GOR) reaching values up to 5,000 m3 /m3 . To reduce the rate of gas breakthrough and delay water breakthrough, a new well design was proposed featuring the following technologies: dual-lateral production wells with a TAML 5 junction; active monitoring of inflows from each lateral in an interval of the junction by using multiposition valves hydraulically controlled from the surface; pressure and temperature sensor system that enables real-time tracking of the formation conditions in the drainage area of the laterals, estimates flow rate from each lateral, and interprets the obtained data to determine reservoir parameters. The first TAML 5 intelligent well had a very stable flow regime with a flow rate of more than 400 tons of oil per day. GOR and water cut showed a better dynamic when compared to offset wells in the field, where gas and water breakthrough was observed. One of the main reasons for this was the ability to control drawdown in each of the laterals by using multiposition valves installed in the pressure-tight junction. When compared to the standard monobore well drainage area, boundaries have been considerably extended. At the same time, production was achieved with much lower drawdowns than for wells with a single lateral, while maintaining the same flow rate. As a result of smaller reservoir and tubing pressure differences, the speed of the water and gas vertical movement significantly slowed down, even with the proximity of gas- oil contact (GOC) and oil-water contact (OWC) to the wellbores. The second TAML 5 well was sidetracked from the existing well. Prior to sidetracking, the well was producing with high GOR (more than 2,000 m~3 /m~3 ) and low flow rate. After the sidetrack was drilled and completed, total GOR decreased by 75% while the production rate increased more than 3 times. The main reason for such a positive change was the increase in coverage ratio, as well as the redistribution of the drawdown between and along the laterals. In both wells, the intelligent completion enabled real-time drawdown redistribution to respond to changes in well production during the life of the well. The use of a pressure-tight TAML 5 junction is relevant for any field with an active gas cap. This manuscript provides the details of the development, justification, and field-testing of this new approach for the development of offshore fields by using multilateral intelligent wells and a pressure-tight TAML 5 junction to substantiate the advantages and benefits of this technology.
机译：2015年，Lukoil-Nizhnevolzhskneft在Caspian Sea-A的KorChagina领域开发了两个智能多边（TAML 5）孔，首先是该公司的服务提供商卢库伊尔和斯南伯格。海上场的开发难以，需要非标准程序和解决方案，包括使用新技术来构建多边井。本文介绍了在存在高燃气和水突出风险的条件下使用TAML 5智能完成方法的方法。这种类型完成的主要目标是在灾难性的气体突破前延长生产期，通过钻几排水管增加排水区，因此增加了全油回收。 KorChagina领域的形成是一个高度为20米的油轮，位于大规模（高达90米）的气帽和底部边缘水之间。在大多数井（通常是延长钻井（ERD）井），生产的前三个月的产量见气体突破，石油产量下降，气/油比（GOR）达到5,000m3 / m3的值。为了降低气体突破和延迟水突破的速度，提出了一种新的技术，其中包括以下技术：双横向生产井，带有Taml 5交界处;通过使用从表面液压控制的多旋转阀的连接间隔中的每个横向流入的主动监测;压力和温度传感器系统，使得能够实时跟踪横向的排水区域中的形成条件，估计来自每个横向的流速，并解释所获得的数据以确定储层参数。第一个TAML 5智能井有一个非常稳定的流量，每天流量超过400吨油。与偏移井相比，GOR和水切口显示出更好的动态，在该领域的偏移井相比，在其中观察到气体和水突破。其中一个主要原因之一是通过使用安装在压力紧密结合的多旋转阀来控制每个侧板的缩减能力。与标准单次井排水区相比，边界已大大延长。与此同时，生产的生产率远低于具有单个横向的孔，同时保持相同的流速。由于水库和管道压力差异较小，水和气体垂直运动的速度显着减慢了，即使是气体 - 触点（GOC）和油水接触（OWC）到井筒。第二个Taml 5井从现有的井侧面。在侧链之前，井生产高GOR（超过2,000m〜3 / m〜3）和低流速。钻井并完成后，总GOR减少75％，而生产率增加3倍以上。这种积极变化的主要原因是覆盖率的增加，以及横向之间和沿着横向之间的拉伸的再分配。在两个井中，智能完成使得能够进行实时缩小重新分配，以响应井生命周期内生产的变化。使用压力密封的Taml 5结与有源气体盖的任何场相关。本手稿提供了通过使用多边智能井和压力紧密Taml 5结来证实该技术的优缺点的开发，理由和现场测试的开发，理由和现场测试。

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