无通道套损井打通道及报废技术
发布时间：2018-09-13 15:35
【摘要】：大庆油田井下作业分公司每年施工无通道套损井约40口,该类井大面积出现在成片套损区域内,若不对单井进行彻底根治,将影响整个区块开发效果。近年来,小通径打通道技术取得了长足的进步,但该类井施工还存在时效差、施工成本高等问题,一直是制约油田大修工艺进一步发展的瓶颈,其难点主要有以下三个方面:一是铅印无法描述断口立体形态,判定无通道形态难;二是无通道形态多样,针对性打通道工艺不完善,通道打开难;三是未打开通道井报废技术单一,有效报废及评价难。这些未修复的套损井不仅本井产能无法恢复,造成油田资产的闲置,而且严重影响区块注采关系的调整,容易诱发成片套损。为此,研究无通道套损井打通道及报废技术是十分有必要的。本论文首先通过对断口形态诊断技术的研究,确定不同套损区块断口的具体形态,为打通道工艺方法优选提供依据。对于能够打开通道的套损井,研究无通道套损井上、下断口处理技术,实现对套管断口的修整,对于活性断口,研究一套封固管柱,实现只对套管外环空封固,确保套管内无水泥塞存留。研究无通道套损井中的落物打捞技术,通过分析利用扩张式扶正短接、伸缩导引打捞工具等,实现大直径、长裸眼井段条件下,下断口内落物鱼头的打捞。捞净落物后,可采用两种方式实现套损井的修复。一是先修复水泥环,再密封加固;二是先进行密封加固,再修复水泥环。对于打不开通道的套损井,通过研究管外钻铣后射孔技术、带压挤注封堵技术,实现有落物套损井有效报废。加之,还研制了系列化的适合无通道套损井打通道的锻铣、磨铣、扩径以及打捞工具。无通道套损井打通道及报废技术的研究对发挥套损井潜能和区块综合挖潜具有重要意义。
[Abstract]:There are about 40 wells without tunnel casing damage in Daqing Oilfield downhole operation branch every year. The large area of this kind of wells appears in the region of casing damage. If the single well is not thoroughly cured, the development effect of the whole block will be affected. In recent years, great progress has been made in the technology of small path drilling, but there are still some problems in the construction of this kind of wells, such as poor time and high construction cost, which have been the bottleneck restricting the further development of the overhaul process in oil fields. The main difficulties are as follows: first, lead printing can not describe the three-dimensional shape of fracture surface, and it is difficult to judge the shape of no channel, the second is that the form of no channel is diverse, the process of targeting channel is not perfect, and the opening of channel is difficult. Third, the unopened passageway well scrap technology is single, effective scrapping and evaluation is difficult. These unrepaired casing damage wells are not only unable to recover the production capacity of their own wells, resulting in idle oil field assets, but also seriously affect the adjustment of injection-production relations in blocks, which can easily induce casing damage. Therefore, it is necessary to study the passageway drilling and scrapping technology without tunnel casing damage. In this paper, through the study of fracture morphology diagnosis technology, the specific shape of fracture surface in different casing damage blocks is determined, which provides the basis for the optimal selection of passageway process. For the casing damaged well that can open the passage, study the treatment technology of the upper and lower fracture surface of the casing damage well without the passage, realize the repair of the casing fracture surface, for the active fracture, study a set of sealing pipe string, and realize only the outer casing annulus empty sealing, Ensure that there is no cement plug in the casing. This paper studies the fishing technology of falling objects in the well without tunnel casing damage. By means of analysis and utilization of the extended leveling and short connection and telescopic guiding fishing tools, the fishing head of falling matter in the lower fracture is realized under the condition of large diameter and long open hole section. Two ways can be used to repair the casing damaged well. One is to repair the cement ring, then to seal the reinforcement; the other is to seal the ring first, and then to repair the cement ring. For the casing damaged wells which can not open the passage, through studying the perforation technology after drilling and milling outside the pipe and the plugging technology with squeeze injection, the effective scrapping of the casing damaged wells with falling objects can be realized. In addition, a series of forging milling, diameter expanding and fishing tools are developed. The research on drilling and scrapping technology without tunnel casing damage is of great significance for exerting the potential of casing damage wells and comprehensively tapping potential in blocks.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE358
本文编号：2241589
[Abstract]:There are about 40 wells without tunnel casing damage in Daqing Oilfield downhole operation branch every year. The large area of this kind of wells appears in the region of casing damage. If the single well is not thoroughly cured, the development effect of the whole block will be affected. In recent years, great progress has been made in the technology of small path drilling, but there are still some problems in the construction of this kind of wells, such as poor time and high construction cost, which have been the bottleneck restricting the further development of the overhaul process in oil fields. The main difficulties are as follows: first, lead printing can not describe the three-dimensional shape of fracture surface, and it is difficult to judge the shape of no channel, the second is that the form of no channel is diverse, the process of targeting channel is not perfect, and the opening of channel is difficult. Third, the unopened passageway well scrap technology is single, effective scrapping and evaluation is difficult. These unrepaired casing damage wells are not only unable to recover the production capacity of their own wells, resulting in idle oil field assets, but also seriously affect the adjustment of injection-production relations in blocks, which can easily induce casing damage. Therefore, it is necessary to study the passageway drilling and scrapping technology without tunnel casing damage. In this paper, through the study of fracture morphology diagnosis technology, the specific shape of fracture surface in different casing damage blocks is determined, which provides the basis for the optimal selection of passageway process. For the casing damaged well that can open the passage, study the treatment technology of the upper and lower fracture surface of the casing damage well without the passage, realize the repair of the casing fracture surface, for the active fracture, study a set of sealing pipe string, and realize only the outer casing annulus empty sealing, Ensure that there is no cement plug in the casing. This paper studies the fishing technology of falling objects in the well without tunnel casing damage. By means of analysis and utilization of the extended leveling and short connection and telescopic guiding fishing tools, the fishing head of falling matter in the lower fracture is realized under the condition of large diameter and long open hole section. Two ways can be used to repair the casing damaged well. One is to repair the cement ring, then to seal the reinforcement; the other is to seal the ring first, and then to repair the cement ring. For the casing damaged wells which can not open the passage, through studying the perforation technology after drilling and milling outside the pipe and the plugging technology with squeeze injection, the effective scrapping of the casing damaged wells with falling objects can be realized. In addition, a series of forging milling, diameter expanding and fishing tools are developed. The research on drilling and scrapping technology without tunnel casing damage is of great significance for exerting the potential of casing damage wells and comprehensively tapping potential in blocks.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE358
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本文编号：2241589
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