苏53区块水平井技术工厂化方案研究
发布时间：2018-10-21 15:51
【摘要】：长城钻探自2005年参与苏里格气田合作开发,致密砂岩气藏开发技术日趋成熟,开发效果逐步提高。为提高工作效率,降低开发成本,长城钻探在苏53块开展大平台丛式井组工厂化作业项目。本文研究了苏53区块大平台丛式井钻井工程方案,基于工厂化钻井施工模式制定了井场布置方案。采用了双钻机分两排相向整拖施工方案,优化设计了井场面积、井口间距、排间距等参数。在满足地质要求的前提下,优化了井身结构设计方案,优化了各层套管的尺寸、下入深度以及完井管柱方案。制定了苏53区块丛式水平井眼轨迹设计原则,制定了两套井眼轨迹方案并进行了力学分析,最终优选了轨迹设计方案。该方案采取“直-增-稳-扭增-水平”剖面,根据偏移距从1250m左右定向,先以20°井斜稳斜到3090m左右,最后以5°/30m曲率增井斜到目标A点。优化后井眼轨迹在很大程度上降低了扭方位幅度,使得现场实钻轨迹与设计轨迹基本吻合。基于摩阻扭矩监测技术进行现场测试,确定了不同工况磨阻系数。结果表明,不同工况下套管内摩阻系数稍有差异,但变化不大。套管摩阻系数在0.17~0.2之间,裸眼摩阻系数在0.23~0.25之间。基于该结构可以在现场有目的性地取值摩阻系数,进而较准确的预计和分析钻具在井下的受力情况,达到指导施工队伍合理选取钻井参数,钻井液性能,优化钻具组合以及优选钻头的目的。
[Abstract]:The Great Wall has been involved in the joint development of Sulige gas field since 2005. The development technology of tight sandstone gas reservoir has become more mature and the development effect has been improved gradually. In order to improve the working efficiency and reduce the development cost, the Great Wall drilling carried out a large platform cluster well group factory project in Su53 blocks. In this paper, the drilling project of large platform cluster well in Su53 block is studied, and the well site layout scheme is established based on the factory drilling mode. The dual drilling rig was used to design the parameters such as well site area, wellhead spacing, row spacing and so on. On the premise of satisfying the geological requirements, the design scheme of wellbore structure is optimized, and the size, depth and completion string of casing in each layer are optimized. The principle of trajectory design of cluster horizontal well in block Su53 is established, two sets of well trajectory schemes are worked out and mechanical analysis is carried out, and finally the trajectory design scheme is selected. According to the orientation of migration distance from 1250m to 3090m or so, the slope of 20 掳well is first inclined to 3090m or so, and finally, 5 掳/ 30m curvature is used to increase well inclination to target point A. The optimized borehole trajectory reduces the torsional azimuth amplitude to a great extent and makes the field drilling trajectory basically coincide with the designed trajectory. Based on the friction torque monitoring technology, the friction coefficient of different working conditions was determined. The results show that the friction coefficient of casing is slightly different under different operating conditions, but the change is not significant. The friction coefficient of casing is between 0.17g and 0.2, and that of naked eye is between 0.230.25. Based on this structure, the friction coefficient can be obtained purposefully in the field, and then the stress condition of the drill tool in the downhole can be predicted and analyzed accurately, so as to guide the construction team to select the drilling parameters reasonably and the drilling fluid performance. The purpose of optimizing drilling tool combination and selecting drill bit.
【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】：TE243
，
本文编号：2285595
[Abstract]:The Great Wall has been involved in the joint development of Sulige gas field since 2005. The development technology of tight sandstone gas reservoir has become more mature and the development effect has been improved gradually. In order to improve the working efficiency and reduce the development cost, the Great Wall drilling carried out a large platform cluster well group factory project in Su53 blocks. In this paper, the drilling project of large platform cluster well in Su53 block is studied, and the well site layout scheme is established based on the factory drilling mode. The dual drilling rig was used to design the parameters such as well site area, wellhead spacing, row spacing and so on. On the premise of satisfying the geological requirements, the design scheme of wellbore structure is optimized, and the size, depth and completion string of casing in each layer are optimized. The principle of trajectory design of cluster horizontal well in block Su53 is established, two sets of well trajectory schemes are worked out and mechanical analysis is carried out, and finally the trajectory design scheme is selected. According to the orientation of migration distance from 1250m to 3090m or so, the slope of 20 掳well is first inclined to 3090m or so, and finally, 5 掳/ 30m curvature is used to increase well inclination to target point A. The optimized borehole trajectory reduces the torsional azimuth amplitude to a great extent and makes the field drilling trajectory basically coincide with the designed trajectory. Based on the friction torque monitoring technology, the friction coefficient of different working conditions was determined. The results show that the friction coefficient of casing is slightly different under different operating conditions, but the change is not significant. The friction coefficient of casing is between 0.17g and 0.2, and that of naked eye is between 0.230.25. Based on this structure, the friction coefficient can be obtained purposefully in the field, and then the stress condition of the drill tool in the downhole can be predicted and analyzed accurately, so as to guide the construction team to select the drilling parameters reasonably and the drilling fluid performance. The purpose of optimizing drilling tool combination and selecting drill bit.
【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】：TE243
，
本文编号：2285595
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