川西须五致密砂岩气藏完井投产管柱及工艺优化研究

发布时间：2018-01-09 09:43

本文关键词：川西须五致密砂岩气藏完井投产管柱及工艺优化研究　出处：《西南石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：论文所研究的川西须五气藏为致密砂岩气藏,储层显示效果丰富。根据西南油气分公司“十二五”规划目标,是西南探区勘探开发先导试验区。根据须五前期开发经验和技术需求,“大液量、大排量、多分段”的改造模式对于提高川西须五储层单井产量十分重要。本文通过调研国内外“大液量、大排量、多分段”的完井改造投产管柱技术与工艺,结合须五气藏开发技术需求,确定了直井/定向井油套混注和水平井泵送桥塞+射孔联作完井改造工艺。针对直井/定向井前期油套混注多封隔器管柱出现封隔器提前解封、压差滑套无法开启、管柱下移等问题,通过对“射孔筛管、丢手装置、压差滑套”等油套混注实现方式及封隔器的优选,最终形成了可靠性高的油套混注完井改造投产管柱,并配套和优化施工工艺。在优化管柱过程中,修正温度压力模型,确保在不同工况下温度压力分布误差控制在允许范围以内,并优选出带封隔器管柱受力模型,采用VB语言编制程序进行模拟计算,分析管柱在井筒内的受力、变形及强度情况。针对水平井采用泵送桥塞分段完井改造技术,优化桥塞选型、泵送排量以及连续油管钻塞等参数及工艺。优化形成的直井/定向井油套混注工艺和水平井泵送桥塞+射孔联作工艺在须五气井顺利实施。直井X502井采用油套混注方式,完成纵向6层分层压裂,最大施工排量达15m/min,共计注入液量10930m3。水平井X505H井采用泵送桥塞+射孔联作工艺成功实施7段大规模的改造作业,施工最大压力75MPa,最大排量13.4m3/min。须五完井投产管柱和工艺的实施可为我国开发类似深层致密砂岩气藏提供技术借鉴。
[Abstract]:The Xuwu gas reservoir studied in this paper is a tight sandstone gas reservoir with rich reservoir performance. According to the "12th Five-Year Plan" goal of Southwest Oil & Gas Company. It is a pilot area for exploration and development in the southwest exploration area. According to the development experience and technical requirements of the five Prophase of Xuehu, "large liquid quantity and large discharge capacity". It is very important to improve the production of single well in Xuwu reservoir in West Sichuan. This paper investigates the technology and technology of completion and production string of "large fluid quantity, large displacement and multi-section" at home and abroad. Combined with the technical requirements of the development of Xuwu gas reservoir. The completion revamping process of oil casing mixing and horizontal pumping bridge plug perforation in vertical well / directional well is determined. The Packer is released ahead of time in view of the multiple Packer string of oil casing mixing injection in the early stage of vertical well / directional well. The pressure differential slip sleeve can not be opened and the pipe string is moved downwards. By means of "perforating sieve pipe, hand throwing device, pressure differential slide sleeve" and so on, the way of oil sleeve mixing and the selection of the Packer are selected. Finally, the high reliability of oil casing mixed injection completion was formed, and the tubing string was reformed and put into operation, and the temperature and pressure model was revised in the process of optimizing the tubing string. To ensure that the error of temperature and pressure distribution is controlled within the allowable range under different working conditions, the stress model of pipe string with Packer is selected, and the simulation calculation is carried out by VB language, and the stress of pipe string in wellbore is analyzed. According to the horizontal well, the pump bridge plug is adopted to improve the type selection of bridge plug. Parameters and techniques for pumping displacement and continuous tubing plug drilling-optimized oil casing mixing process for straight / directional wells and pump bridge plug for horizontal wells. The perforation combined production process was successfully implemented in the Xuwu gas well and the oil casing injection was used in the X502 well of the vertical well. The longitudinal 6 layer fracturing is completed, and the maximum operation displacement is 15 m / min. A total of 10930m3.The horizontal well X505H adopts the combined perforation process of pumping bridge plug to successfully carry out the large-scale reconstruction operation in 7 sections, with the maximum operating pressure of 75MPa. The implementation of the tubing string and the process of the completion of the five wells can provide a technical reference for the development of similar deep tight sandstone gas reservoirs in China.
【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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