吉林油田水平井多级滑套连续油管解堵研究

发布时间：2018-11-04 13:06

【摘要】：多年来,吉林油田大量的开发水平井,其中水平井压裂的方式也多样化,完井方式也多样化,大部分水平井采用多级滑套投球裸管压裂,从悬挂器到压差滑套之间每级滑套的球座大小不一,最大达到92mm,最小的达到41mm,在实施压裂过程中经常遇到压堵的问题,压堵后,后续的压裂不能按规定时间施工,给油田的产能建设和油田开发带来一定影响。另外全国环境环保要求严格,采取常规的解堵工艺不能顺利通过滑套和不能控制井内能量,一旦解堵成功,压裂的层位将释放能量,释放能量传递到井口难以控制,引起井控事故和环境污染,在油田行业和全国禁止发生。针对上述问题,本文研究水平井多级滑套连续油管解堵,从连续油管内流体流动压降损失理论着手,研究整个系统过程中的压降,连续油管解堵前的施工模拟以及解堵设备和解堵专用工具。解决上述难题,能快速有效的通过不同尺寸的滑套,能有效的控制井底压力传递到井口引发事故。研究水平井多级滑套连续油管解堵工艺技术,不但解决吉林油田水平井开发遇到的不同问题,而且推动吉林油田连续油管作业工艺技术不断前行。
[Abstract]:Over the years, a large number of horizontal wells have been developed in Jilin Oilfield, in which the fracturing methods of horizontal wells are also diversified, and the completion methods are also diversified. The ball pedestal between the suspension and the differential pressure slip sleeve varies in size, reaching a maximum of 92 mm and a minimum of 41 mm. During the process of fracturing, the problem of pressure and plugging is often encountered. After plugging, subsequent fracturing cannot be carried out in accordance with the prescribed time. It has a certain impact on the productivity construction and oilfield development of the oil field. In addition, the environmental protection requirements of the whole country are strict, and the conventional plugging removal process cannot smoothly pass through the sliding casing or control the energy in the well. Once the plugging is successfully removed, the layer of fracturing will release energy, which will be difficult to control when the released energy is transferred to the wellhead. Well-control accidents and environmental pollution are prohibited in the oil field industry and throughout the country. In view of the above problems, this paper studies the plugging removal of multistage sliding casing continuous tubing in horizontal wells, starting with the theory of pressure drop of fluid flow in continuous tubing, and studying the pressure drop in the whole process of the system. Construction simulation of continuous tubing before plugging removal and special tools for removing plugging equipment and plugging. To solve the above problems, it can quickly and effectively control the bottom hole pressure transfer to the wellhead and cause accidents. In order to solve the different problems encountered in the development of horizontal wells in Jilin Oilfield, the technology of multi-stage slip-casing continuous tubing removal technology in horizontal wells is studied, and the continuous progress of continuous tubing operation technology in Jilin Oilfield is also promoted.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE931.2

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