古巴近海浅滩大位移水平井钻完井技术研究
发布时间：2019-03-07 12:02
【摘要】：本文主要针对古巴近海浅滩的大位移水平井的地质特性,储层特性,制定一系列的大位移成本分析和风险评估方法,并通过一定的理论研究制定出一套适合大位移水平井的钻完井技术方案,包括大位移水平井井眼轨迹及井身结构优化设计,大位移水平井钻具组合优化设计;大位移水平井扭矩、摩阻控制技术;井眼清洁技术措施;大位移水平井安全钻井措施等。本文通过对大位移井专业工具的研制,制订一套成形的大位移水平井钻完井工艺技术,其中包括1.大位移井减摩、减扭工具,并开展摩阻扭矩的预测分析研究,优化参数,尽量增大延伸距离,降低扭矩。2.双向划眼工具的研发,双向划眼工具采用了螺旋棱形的设计结构和嵌镶的合金切削齿,通井过程中能完全消除井壁的微台阶,降低了钻井的风险。3.完成井眼清洁工具.该工具形状类似于钻具螺旋扶正器,径向分布着很多螺旋切削齿,随钻具的转动,将岩屑床搅碎并随钻井液携带出井筒,并且该工具特殊的流道设计可以瞬间提高钻井液运移速率,进而提高对岩屑运移的效果,最终实现岩屑的清除。4.漂浮接箍下套管技术得到很好地实现。5.进行了连续循环钻井系统工具的研发.该系统工具可在接单根的时候保持钻井液的连续循环,有助于消除接单根停泵和启泵引起的压力变化和压力波动,成功避免了古巴大位移井在中途接单根时候出现的粘卡现象。
[Abstract]:Based on the geological and reservoir characteristics of large displacement horizontal wells in offshore shoal of Cuba, a series of large displacement cost analysis and risk assessment methods are developed in this paper. Through some theoretical research, a set of drilling and completion technology scheme suitable for large displacement horizontal well is worked out, including the optimization design of hole trajectory and wellbore structure of large displacement horizontal well, and the optimization design of drilling tool assembly of large displacement horizontal well. Torque of large displacement horizontal well, friction control technology, hole cleaning technology, safe drilling measure of large displacement horizontal well, etc. In this paper, through the development of professional tools for large displacement wells, a set of forming techniques for drilling and completion of large displacement horizontal wells is developed, including 1. The tool of reducing friction and torsion is used in large displacement well, and the prediction and analysis of friction torque is carried out to optimize the parameters, enlarge the extension distance as far as possible, and reduce the torque. 2. The research and development of two-way piercing tool, the two-way piercing tool adopts spiral prismatic design structure and embedded alloy cutting teeth, which can completely eliminate the micro-steps of the borehole wall and reduce the risk of drilling in the process of passing through the well. 3. Finish hole cleaning tools. The tool is similar in shape to the drill screw centralizer, with a number of helical cutting teeth distributed in the radial direction, the rotation of the tool while drilling, the fragmentation of the cuttings bed and the carrying of the cuttings out of the wellbore with the drilling fluid. The special channel design of the tool can increase the migration rate of drilling fluid instantly, and then improve the effect of cuttings migration, and finally realize the removal of cuttings. 4. Floating coupling casing technology is well realized. 5. The tool of continuous circulation drilling system is developed. The system tool can keep the continuous circulation of drilling fluid when the single rod is connected, which can help to eliminate the pressure change and pressure fluctuation caused by the single stop and start pump, and successfully avoid the sticking phenomenon of the Cuban well with large displacement when connecting the single rod in the midway, which is helpful to eliminate the pressure change and the pressure fluctuation caused by the connection of the single pump stop and start pump.
【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】：TE52
，
本文编号：2436100
[Abstract]:Based on the geological and reservoir characteristics of large displacement horizontal wells in offshore shoal of Cuba, a series of large displacement cost analysis and risk assessment methods are developed in this paper. Through some theoretical research, a set of drilling and completion technology scheme suitable for large displacement horizontal well is worked out, including the optimization design of hole trajectory and wellbore structure of large displacement horizontal well, and the optimization design of drilling tool assembly of large displacement horizontal well. Torque of large displacement horizontal well, friction control technology, hole cleaning technology, safe drilling measure of large displacement horizontal well, etc. In this paper, through the development of professional tools for large displacement wells, a set of forming techniques for drilling and completion of large displacement horizontal wells is developed, including 1. The tool of reducing friction and torsion is used in large displacement well, and the prediction and analysis of friction torque is carried out to optimize the parameters, enlarge the extension distance as far as possible, and reduce the torque. 2. The research and development of two-way piercing tool, the two-way piercing tool adopts spiral prismatic design structure and embedded alloy cutting teeth, which can completely eliminate the micro-steps of the borehole wall and reduce the risk of drilling in the process of passing through the well. 3. Finish hole cleaning tools. The tool is similar in shape to the drill screw centralizer, with a number of helical cutting teeth distributed in the radial direction, the rotation of the tool while drilling, the fragmentation of the cuttings bed and the carrying of the cuttings out of the wellbore with the drilling fluid. The special channel design of the tool can increase the migration rate of drilling fluid instantly, and then improve the effect of cuttings migration, and finally realize the removal of cuttings. 4. Floating coupling casing technology is well realized. 5. The tool of continuous circulation drilling system is developed. The system tool can keep the continuous circulation of drilling fluid when the single rod is connected, which can help to eliminate the pressure change and pressure fluctuation caused by the single stop and start pump, and successfully avoid the sticking phenomenon of the Cuban well with large displacement when connecting the single rod in the midway, which is helpful to eliminate the pressure change and the pressure fluctuation caused by the connection of the single pump stop and start pump.
【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】：TE52
，
本文编号：2436100
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