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首页> 外文会议>SPE Russian Petroleum Technology Conference and Exhibition >A Novel Strategy for Restoring the Well Integrity by Curing High Annulus-B Pressure and Zonal Communication
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A Novel Strategy for Restoring the Well Integrity by Curing High Annulus-B Pressure and Zonal Communication

机译：一种通过固化高环-B压力和区内通信恢复井诚信的新策略

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The petroleum industry is performing extensive research into rectifying structural well integrity issues, mainly caused by migration of hydrocarbon fluids to surface through microchannels, due to poor cementation, resulting in the inability to provide integral barriers in the 95/8″ casing × 12?″ hole annulus. As a consequence, the well life can be extended and the older wells can be restored back to production and injection, resulting in long term fulfilling of the increasing global demand for additional energy requirement. Annulus-B Remediation using HydraWell Technology is one of the innovative approaches that can be utilized in wells to provide strong integral cement barriers behind the 95/8″ production casing to prevent reservoir fluids migrating to surface. This approach is gaining increased popularity due to a number of economic and environmental advantages such as restoring the well production/injection with minimum workover costs and risk due to less complex operations, mitigate environmental concerns by avoiding excessive steel cuttings like section milling and eliminating the complexity associated to re-entry risk as incase of section milling. The research utilizes a novel technology to execute a repair of wells with failed Annulus-B barrier integrity by providing integral cement barriers in the 95/8″ × 133/8″ casing annulus above the reservoir for wells experiencing migration of hydrocarbons from reservoir through the 95/8″ × 133/8″ casing annulus. The planned methodology starts with completion recovery followed by running noise, temperature and cement bond logs in order to evaluate the cement quality behind 95/8" casing above the reservoir. Findings from the noise/temperature logs and oil sample evaluation indicated that oil is migrating from the reservoir, through 95/8″ × 133/8″ casing annulus, dripping at surface through the 30″ conductor pipe. The cement bond logs indicate poor cement behind 95/8″ casing above the reservoir. Therefore, Remediation technology was successfully utilized as it delivers effective jet washing and subsequent cleaning of the annular space using specialized tools and thereafter spraying cement to create a 100-feet competent cement barrier behind the casings for effective isolation and the prevention of pressure communication to the surface via Annulus-B. Furthermore, a 7″ short tie-back was installed over the perforated cemented interval. Hence, the 95/8" casing was re-established as a well barrier element in the well, allowing the injection rate for the well to be restored. This strategy may be developed as a very cost effective technology as it saves the operator approximately 5-8 days per well with associated significant CAPEX and OPEX savings by avoiding additional costs associated with complexity of operations in section milling. It is feasible to be applied in offshore wells requiring remediation of failed Annulus-B integrity with reduced rig time and the associated costs with minimum environmental risk.
机译：石油工业正在对整流结构井完整性问题进行广泛的研究，主要是由于胶泥较差的微通道迁移碳氢化合物流体通过微通道迁移，导致在95/8“壳×12”中无法提供整体屏障。孔环。因此，井生命可以延长，较旧的井可以恢复到生产和注射，从而长期满足额外的全球需求对额外的能源需求。使用Hydrawell技术的环Unciediation是可在井中提供的创新方法之一，以便在95/8“生产壳体后面提供强大的整体水泥屏障，以防止迁移到表面的储层液体。由于许多经济和环境优势，这种方法具有增加的普及，例如恢复良好的工作服成本和由于运营较小的运营而导致的井生产/注入，通过避免像截面铣削等过多的钢切割来减轻环境问题，并消除复杂性。与重新入境风险相关，作为铣削的Incase。该研究利用了一种新颖的技术来通过在储存器上方的95/8“×133/8”壳体环中提供整体的水泥屏障，通过在储存器上方的95/8“×133/8”壳体环中，以通过通过储存器迁移碳氢化合物迁移的井中的95/8“×133/8”套管环形，从而实现了硬度的环形屏障完整性。 95/8“×133/8”套管环。计划的方法从完成恢复开始，然后运行噪声，温度和水泥键的日志，以评估水泥质量后面的95/8“壳体上方的套管。噪声/温度日志和油样评估结果表明石油正在迁移从储存器，通过95/8“×133/8”套管环，在表面上滴落到30“导体管道。水泥键原木表现出95/8”壳体上方的壳体后面的差水泥。因此，修复技术成功了用作使用专用工具的喷射和随后清洁环形空间的用作使用专业工具，然后喷涂水泥以在壳体后面产生100英尺的态度水泥屏障，以通过环UNALUALU-B防止与表面的压力通信。此外，在穿孔间隔内安装7“短的连接。因此，95/8”壳体被重新建立为孔屏障EL井中的偏好，允许恢复井的注射速度。该策略可以作为一个非常具有成本效益的技术，因为它通过避免与部分铣削的操作复杂相关的额外成本，通过相关的大量资本资本和OPEX节省，因此每台良好地节省5-8天。在近海井中应用需要修复失败的环形B-B完整性以及最小环境风险的相关成本，这是可行的。

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