空心斜向器定向射孔技术在文昌海域油田的应用

Application of Directional Perforating Technology with Hollow Whipstock in Wenchang Offshore Oilfield

摘要: 文昌海域油田大部分平台已无可用槽口，部分平台短期无低效井侧钻，迫切需要一种经济且高效的技术实现油藏开采的快速推进目标。在本项研究中，采用空心斜向器定向射孔技术以进行井下作业。通过综合评估井控需求、井筒完整性以及射孔效率，并与现有分支技术方案进行对比分析，我们发现该技术在成本效益上具有明显优势，对侧钻作业的场地条件要求较低，且在操作过程中的难度也相对较小。此项技术在B4S2井的应用，使射孔后的产量远超配产且生产压差与前期井保持一致，产油量由72 m³∙d⁻¹提高至185 m³∙d⁻¹。该技术有效解决了经济性问题，满足了提高采收率的要求，为海上油气田的经济高效率开发提供了参考。

Abstract: Most of the platforms in the Wenchang sea field have no more available slots, and some platforms have no short-term inefficient wells for side track drilling, so there is an urgent need for an economical and efficient technology to realize the goal of rapid advancement of reservoir recovery. In this study, the directional perforating technology with hollow whipstock is used in order to carry out downhole operations. By comprehensively evaluating the well control requirements, wellbore integrity, and perforation efficiency, and comparing it with the existing branch technology solutions, we found that this technology has obvious advantages in terms of cost-effectiveness, low requirements for the site conditions of the side track drilling operation, and relatively low difficulties in the operation process. The application of this technology in the B4S2 well has resulted in the production rate after perforation injection far exceeding the allotted production rate and the production differential pressure is consistent with that of the previous wells, and the oil production rate has increased from 72 m³∙d⁻¹ to 185 m³∙d⁻¹. This technology effectively solves the problem of economy, meets the requirements of enhanced recovery, and provides a reference for the economic and efficient development of offshore oil and gas fields.