超深水平井裸眼分段完井管柱优化设计及顺利下入技术研究
发布时间：2018-08-06 14:24
【摘要】：随着中浅层油气藏的不断开发,深层油气在未动用石油地质储量中所占比例越来越大,大量的深层油气钻探工作在世界各国展开,并发现了大量深层油气；完井技术对充分发挥水平井,提高深层油气藏产能和采收率中的作用十分突出,国内现有的完井技术水平已跟不上深层油气藏水平井开发技术要求,完井技术现状制约着深层油气藏水平井的高效开发。科学高效地开采深层油气资源对解决我国能源需求具有重要意义；如何尽快突破深层油气开发瓶颈,打破国外技术垄断是我国石油科技工作者面临的重要任务。 元坝气田是世界上超深海相酸性气田之一,叠合区及滩相储层物性较差,具有埋藏深、压力高、裂缝非均质性强、气水关系复杂等复杂地质特征；本文从气井产能情况、气水关系、储层改造要求、工程作业风险四个方面来简明扼要说明元坝区块完井方式优选；考虑到元坝叠合区跟滩相储层(无法通过自然建产获得产量)需采用裸眼分段完井酸化建产,分析得出元坝裸眼分段完井投产难点,即管柱顺利下入、工具可靠性保障、完井管柱优化设计、安全投产。 本文主要利用landmark软件对完井管柱下入进行分析,得出元坝裸眼分段完井适用的井筒条件需满足：二开井段(3100m±)狗腿度1°/30m,测点要求10m一个点；三开、四开直井段狗腿度3°/30m；造斜段狗腿度9°/30m,水平段狗腿度6°/30m；全井无键槽；尽量避免靶点多次调整造成井眼轨迹复杂,特别是避免轨迹上翘。 在研究带封隔器管柱力学分析模型基础上,对不同工况下水平井井筒压力、温度分布规律进行研究,并建立其计算模型；考虑井斜角、方位角、侧向力及摩阻等综合作用的三维弯曲井眼内管柱轴力计算模型；为后续进行水平井分段完井管柱优化设计奠定基础。基于上述模型,对元坝管柱进行优化设计；选用长度较短的液压裸眼封隔器,采用双压差滑套,采用隔离球座进一步防止岩屑等固相颗粒进入管柱内,采用“永久封+悬挂封”双封隔器设计提高斜井段回插后的环空隔绝、防腐效果。通过强度校核进一步优化9.52mm壁厚油管的使用长度。优化裸眼封隔器的承压能力要求。并提出工具产品的优选建议。
[Abstract]:With the continuous development of middle and shallow reservoirs, the proportion of deep oil and gas in unproduced petroleum geological reserves is increasing. A large number of deep oil and gas drilling work has been carried out all over the world, and a large number of deep oil and gas have been discovered. Completion technology plays an important role in giving full play to horizontal wells and improving productivity and recovery efficiency of deep reservoirs. The existing completion technology level in China can no longer keep up with the technical requirements of horizontal well development in deep reservoirs. The present situation of completion technology restricts the efficient development of horizontal wells in deep reservoirs. Scientific and efficient exploitation of deep oil and gas resources is of great significance to solve the energy demand of our country, and how to break through the bottleneck of deep oil and gas development as soon as possible and break the foreign technology monopoly is an important task facing our petroleum science and technology workers. Yuanba gas field is one of the ultra-deep sea facies acid gas fields in the world. The physical properties of superimposed area and beach facies reservoir are poor, with complex geological characteristics such as deep burial depth, high pressure, strong heterogeneity of fractures, complex gas-water relationship, etc. The relationship between gas and water, the requirement of reservoir reconstruction, and the risk of engineering operation are four aspects to explain simply and concisely the optimal selection of completion mode of block in Yuanba area. Considering that the beach facies reservoir in Yuanba superimposed area (which can not be obtained by natural production) needs to adopt open hole segmented completion acidizing to build production, it is concluded that the difficulties in the production of Yuanba open-hole segmented completion are the smooth entry of tubing string and the guarantee of tool reliability. Completion string optimization design, safe production. In this paper, the landmark software is used to analyze the downhill of completion string, and it is concluded that the wellbore conditions suitable for open hole completion in Yuanba are as follows: (3100m 卤) dog leg degree 1 掳/ 30 m, measuring point 10 m / 1 point, dog leg degree 3 掳/ 30 m in three open and four open straight wells; The dog leg degree of diagonal section is 9 掳/ 30 m, and the horizontal section is 6 掳/ 30 m. There is no keyway in the whole well. On the basis of studying the mechanical analysis model of pipe string with Packer, the distribution law of wellbore pressure and temperature in horizontal well under different working conditions is studied, and its calculation model is established, considering the well inclination angle, azimuth angle, The axial force calculation model of the tube string in the hole of three dimensional bending wells is developed, which can be used as a foundation for the optimization design of the completion string of horizontal wells. Based on the above model, the optimization design of Yuanba pipe string is carried out, and the hydraulic open-hole Packer with short length is selected, the double-pressure differential slide sleeve is adopted, and the isolating ball seat is used to further prevent the solid particles such as cuttings from entering the pipe string. The double Packer of "permanent seal and suspension seal" is used to improve the annulus isolation and anticorrosion effect of the inclined shaft. The length of 9.52mm wall thick tubing is further optimized by strength check. Optimization of bare-eye Packer pressure capacity requirements. And put forward the tool product selection suggestion.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE925.3
本文编号：2168015
[Abstract]:With the continuous development of middle and shallow reservoirs, the proportion of deep oil and gas in unproduced petroleum geological reserves is increasing. A large number of deep oil and gas drilling work has been carried out all over the world, and a large number of deep oil and gas have been discovered. Completion technology plays an important role in giving full play to horizontal wells and improving productivity and recovery efficiency of deep reservoirs. The existing completion technology level in China can no longer keep up with the technical requirements of horizontal well development in deep reservoirs. The present situation of completion technology restricts the efficient development of horizontal wells in deep reservoirs. Scientific and efficient exploitation of deep oil and gas resources is of great significance to solve the energy demand of our country, and how to break through the bottleneck of deep oil and gas development as soon as possible and break the foreign technology monopoly is an important task facing our petroleum science and technology workers. Yuanba gas field is one of the ultra-deep sea facies acid gas fields in the world. The physical properties of superimposed area and beach facies reservoir are poor, with complex geological characteristics such as deep burial depth, high pressure, strong heterogeneity of fractures, complex gas-water relationship, etc. The relationship between gas and water, the requirement of reservoir reconstruction, and the risk of engineering operation are four aspects to explain simply and concisely the optimal selection of completion mode of block in Yuanba area. Considering that the beach facies reservoir in Yuanba superimposed area (which can not be obtained by natural production) needs to adopt open hole segmented completion acidizing to build production, it is concluded that the difficulties in the production of Yuanba open-hole segmented completion are the smooth entry of tubing string and the guarantee of tool reliability. Completion string optimization design, safe production. In this paper, the landmark software is used to analyze the downhill of completion string, and it is concluded that the wellbore conditions suitable for open hole completion in Yuanba are as follows: (3100m 卤) dog leg degree 1 掳/ 30 m, measuring point 10 m / 1 point, dog leg degree 3 掳/ 30 m in three open and four open straight wells; The dog leg degree of diagonal section is 9 掳/ 30 m, and the horizontal section is 6 掳/ 30 m. There is no keyway in the whole well. On the basis of studying the mechanical analysis model of pipe string with Packer, the distribution law of wellbore pressure and temperature in horizontal well under different working conditions is studied, and its calculation model is established, considering the well inclination angle, azimuth angle, The axial force calculation model of the tube string in the hole of three dimensional bending wells is developed, which can be used as a foundation for the optimization design of the completion string of horizontal wells. Based on the above model, the optimization design of Yuanba pipe string is carried out, and the hydraulic open-hole Packer with short length is selected, the double-pressure differential slide sleeve is adopted, and the isolating ball seat is used to further prevent the solid particles such as cuttings from entering the pipe string. The double Packer of "permanent seal and suspension seal" is used to improve the annulus isolation and anticorrosion effect of the inclined shaft. The length of 9.52mm wall thick tubing is further optimized by strength check. Optimization of bare-eye Packer pressure capacity requirements. And put forward the tool product selection suggestion.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE925.3
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