潘豪,曹砚锋,文敏,侯泽宁,马楠,齐致远. 油藏近井耦合确定的射孔方位与油田开发的关系[J]. 石油钻采工艺,2023,45(6):729-737. DOI: 10.13639/j.odpt.202311052
引用本文: 潘豪,曹砚锋,文敏,侯泽宁,马楠,齐致远. 油藏近井耦合确定的射孔方位与油田开发的关系[J]. 石油钻采工艺,2023,45(6):729-737. DOI: 10.13639/j.odpt.202311052
PAN Hao, CAO Yanfeng, WEN Min, HOU Zening, MA Nan, QI Zhiyuan. The relationship between perforation orientation determined by near well coupling in oil reservoirs and oilfield development[J]. Oil Drilling & Production Technology, 2023, 45(6): 729-737. DOI: 10.13639/j.odpt.202311052
Citation: PAN Hao, CAO Yanfeng, WEN Min, HOU Zening, MA Nan, QI Zhiyuan. The relationship between perforation orientation determined by near well coupling in oil reservoirs and oilfield development[J]. Oil Drilling & Production Technology, 2023, 45(6): 729-737. DOI: 10.13639/j.odpt.202311052

油藏近井耦合确定的射孔方位与油田开发的关系

The relationship between perforation orientation determined by near well coupling in oil reservoirs and oilfield development

  • 摘要: 为了在油藏数值模拟中实现水平井不同射孔方位的精确模拟,并提高油藏数值模拟在井筒处及近井区域的模拟精度,探究水平井各种射孔方位对油藏开发的影响,利用角点网格、分层非结构化网格以及三维径向网格等3种网格建立了油藏-近井-井筒精细耦合模型,实现了近井的径向渗流和射孔方位的空间分布的精细描述。利用该耦合模型研究了2种不同井径条件下的顶部、中部、底部和全部射孔4种射孔方位对油藏开发的影响。模拟结果表明,顶部射孔的波及范围最大,井底压力最低,累产油量最高,生产效果最佳;中部和全部射孔的生产效果相近,其波及范围和累产油量等在4种射孔方位里为中等,但井底压力较高;底部射孔的波及范围最小,井底压力较低,累产油量最低,生产效果最差。因此,水平井的射孔方位选择优先考虑顶部射孔,但因顶部射孔的井底压力较低,若有可能造成脱气则考虑中部或全部射孔,不建议选择底部射孔。

     

    Abstract: In order to achieve accurate simulation of different perforation orientations during reservoir numerical simulation for horizontal wells, and to improve the simulation accuracy in the well and near-well regions, as well as to investigate the influence of various perforation orientations in horizontal wells on reservoir development, a detailed reservoir-near well-well coupling model was established using three types of grids: corner-point grids, layered unstructured grids and three-dimensional radial grids. This model enables a detailed description of radial flow near the well and the spatial distribution of perforation orientations. By using this model, the influences of four perforating patterns, including top, middle, bottom and all perforations, on reservoir development under two different well diameter conditions were studied. The simulation results show that the top perforation pattern covers the largest affected area, with the lowest bottomhole pressure, the highest cumulative oil production and the best production behavior. The middle and all perforation patterns show similar production behavior, with moderate affected areas and cumulative oil production among the four perforation patterns, but higher bottomhole pressure. The bottom perforation pattern covers the smallest affected area, with lower bottomhole pressure, the lowest cumulative oil production and the worst production behavior. Therefore, the choice of perforation orientation in horizontal wells should prioritize the top perforation pattern. However, due to the lower bottomhole pressure associated with the top perforation pattern, which may lead to gas breakout, the middle or all perforation patterns should be considered if gas breakout is a concern, and bottom perforation pattern is not recommended.

     

/

返回文章
返回