Novel and High Performing Wellbore Cleaning Fluids with Surprisingly Flat Viscosity over Time and Different Temperatures
- Roderick Pernites (BJ Services) | Felipe Padilla (BJ Services) | Jordan Clark (BJ Services) | Angel Gonzalez (BJ Services) | Diankui Fu (BJ Services)
- Document ID
- Society of Petroleum Engineers
- SPE Western Regional Meeting, 22-26 April, Garden Grove, California, USA
- Publication Date
- Document Type
- Conference Paper
- 2018. Society of Petroleum Engineers
- 2.2 Installation and Completion Operations, 2 Well completion, 1.11 Drilling Fluids and Materials
- Spacer, flat viscosity, surfactant, drilling mud
- 2 in the last 30 days
- 125 since 2007
- Show more detail
- View rights & permissions
|SPE Member Price:||USD 9.50|
|SPE Non-Member Price:||USD 28.00|
Cementing of the casing is critical in well completion and is highly dependent on wellbore cleaning of the drilling mud prior to cement placement. Typically, a water-based intermediate cleaning fluid called spacer is pumped downhole ahead of the cement to carefully displace the drilling mud and clean the well. However, effective well cleaning is challenging and continues to be a problem. Currently, there is no universal spacer formulation that can clean all types of mud. Moreover, maintaining a constant viscosity of the aqueous-based cleaning fluid is extremely difficult to achieve, as it is exposed to a wide temperature disparity from surface to bottom hole circulating temperature (BHCT), creating a challenging scenario to design an effective spacer even with today's displacement softwares.
This paper presents a highly unique and cost-effective wellbore cleaning fluid, which provides superior wellbore cleaning and efficient mud displacement. Unlike many spacer fluids, this new cleaning fluid utilizes a novel material that is not very susceptible to temperature and thus provides a relatively constant viscosity from surface to BHCT, indicating homogeneous and stable suspension of particulates in the fluid at different temperatures. It preserves and extends pumpability, which is useful during prolonged job delays on location or extended residence time inside the wellbore. The innovative material has exceptional physical properties for tightly holding the carrier water while simultaneously upholding the viscosity of the fluid at elevated temperature, translating in a more efficient and realistic fluid removal simulation.
The key novelty and invaluable contribution of this research to the field is the application of a unique material with an exceptional physical property of sustaining flat viscosity of the wellbore cleaning fluid from surface to BHCT, which is highly desirable. To the best of our knowledge, this new material has not been exploited for non-settable spacer fluid applications.
|File Size||1 MB||Number of Pages||14|
Maserati, G., Daturi, E., Del Gaudio, L. D., Belloni, A., Bolzoni, S., Lazzari, W., Leo, G. 2010. Nano-emulsions as Cement Spacer Improve the Cleaning of Casing Bore During Cementing Operations. Presented at the SPE Annual Technical Conference and Exhibition, Florence, Italy, 19-22 September. SPE-133033-MS.
Osode, P. I., Otaibi, M. A., El-Kilany, K. A., Binmoqbil, K. H.Azizi, E. S. 2012. Evaluation of Non-Reactive Aqueous Spacer Fluids for Oil Based Mud Displacement in Open Hole Horizontal Wells. Presented at the Abu Dhabi International Petroleum Conference and Exhibition, Abu Dhabi, UAE, 11-14 November. SPE-161914-MS
Singh, P., Lal, K., Rastogi, R., Joshi, C. S., Sinha, M. P. 2017. Successful Implementation of Improved Rheological Hierarchy of Mud – Spacer – Cement for Effective Zonal Isolation – A Case Study. Presented at the SPE Oil and Gas India Conference and Exhibition, Mumbai, India, 4-6 April. SPE-185405-MS.