Precommissioning to Startup: Getting Chemical Injection Right
- Jeffrey G. Willmon (BP) | Mark A. Edwards (Champion Technologies Ltd.)
- Document ID
- Society of Petroleum Engineers
- SPE Production & Operations
- Publication Date
- November 2006
- Document Type
- Journal Paper
- 483 - 491
- 2006. Society of Petroleum Engineers
- 4.3.1 Hydrates, 4.3.4 Scale, 4.5 Offshore Facilities and Subsea Systems, 1.7 Pressure Management, 2.2.2 Perforating, 4.6 Natural Gas, 4.1.9 Tanks and storage systems, 7.2.1 Risk, Uncertainty and Risk Assessment, 6.1.5 Human Resources, Competence and Training, 5.2 Reservoir Fluid Dynamics, 4.3 Flow Assurance, 4.9.2 Commissioning and Startup (Facility), 4.2 Pipelines, Flowlines and Risers, 1.8 Formation Damage, 4.5.7 Controls and Umbilicals, 5.2 Fluid Characterization, 1.7.5 Well Control, 4.2.3 Materials and Corrosion, 4.3.3 Aspaltenes, 2.7.1 Completion Fluids, 2 Well Completion, 4.1.2 Separation and Treating, 5.2.2 Fluid Modeling, Equations of State, 4.1.5 Processing Equipment
- 0 in the last 30 days
- 677 since 2007
- Show more detail
- View rights & permissions
|SPE Member Price:||USD 5.00|
|SPE Non-Member Price:||USD 35.00|
This paper details lessons learned from practical field experiences concerning the design, construction, and commissioning of a production-chemical program for a green (new) field development. A competent program requires the interaction of various specialty-products and -services suppliers, including experts in flow assurance, modeling, fluid analysis, and specialty chemicals. All are engaged in the early stages of the project and retained as resources throughout.
Areas addressed for the design and implementation of a chemical-injection system (CIS) include the following:
- Exploration. Collected bottomhole samples are used for fluid characterization and risk assessment of any flow-assurance issues. From these initial data, prevention and mitigation strategies, including but not limited to chemical inhibition, are developed. Chemical products can be developed and/or screened for effectiveness and applicability from this initial assessment. This includes performance screening, chemical/chemical-compatibility testing, chemical/material-compatibility testing, and product stability (which is particularly important for umbilical applications).
- Facility design. Specifications for the processing system and equipment are detailed, materials of construction are screened for chemical and fluid compatibility, volume and deliverability requirements are determined, and the CISs are designed.
- Facility construction. Monitoring and oversight throughout the construction process are performed to maintain the integrity of the initial design.
- Operational strategies. Strategies will be developed that address initial flowback, startup, steady-state, and shut-in techniques.
- Logistic strategies. Strategies will be developed that address logistical concerns (e.g., product transfers and handovers).
- (Pre) Startup commissioning and testing of equipment. Cleanliness and operability of the system are an absolute must. The chemical day tanks and injection lines are flushed to specification.
Chemical-injection issues can be safely and successfully managed in new (deepwater) projects by proper fluid characterization and risk assessment; a field-development strategy that includes design, specialty treating chemicals, and operating plans; the involvement of specialists and specialty providers; and training and communication.
As a result of location and/or depletion, petroleum resources have become harder to obtain. This difficulty has created a demand for newer and more sophisticated techniques for the recovery of oil and gas. As a function of this demand, chemical injection has become an important part in the proper performance of newly designed production systems, particularly in the deepwater area of the Gulf of Mexico.
Production chemicals play an important role in the enhancement of oil and gas production—they control corrosion, prevent organic and inorganic deposits (e.g., paraffin/wax, asphaltenes, and mineral scales), enhance flow characteristics, and aid in phase separation. These chemicals can be applied through a variety of techniques, including topside chemical-injection equipment and capillary/downhole injection. Regardless of type, any CIS must be designed to be effective, reliable, forgiving, and redundant.
Chemical injection used in conjunction with system design can maximize the production capacity of the system. For new, or green, fields that are in the design phase, the incorporation of chemical injection is valued because of the resultant tradeoff of capital expenditures (CAPEX) for operating expenditures (OPEX). The idea of trading CAPEX for OPEX is illustrated in Fig. 1. During project design and construction, maximum value can be achieved in minimizing CAPEX by use of proper chemical-injection techniques and procedures. Minimizing CAPEX is achieved by properly anticipating flow-assurance problems through risk assessment during design and by incorporating appropriate mitigation techniques into the construction of the facility.
At facility startup, maximum value is achieved through efficient commissioning and troubleshooting. Proper planning for the remediation of any difficulties will ensure success. Training and communication will be essential to the success of any project.
This paper discusses issues related to the incorporation of chemical injection into the design of a new project. In addition to design issues, suggested actions will be presented that will ease the commissioning and startup of the CIS. Throughout, lessons learned from practical experience will be presented where appropriate. It is the authors' hope that the suggestions presented here will prevent the statement "on the next platform…?? and aid in getting chemical injection right on this platform.
|File Size||590 KB||Number of Pages||9|
Day, M. 2002. What Happened to NAS 1638? Practicing Oil AnalysisMagazine (November).
De Boer, R.B., Leerlooyer, K., Eigner, M.R.P., and van Bergen, A.R.D. 1995.Screening of Crude Oils forAsphalt Precipitation: Theory, Practice, and Selection of Inhibitors.SPEPF 10 (1): 55-61. SPE-24987-PA.http://dx.doi.org/10.2118/24987-PA.
Jamaluddin, A.K.M., Nighswander, J., and Joshi, N. 2001. A Systematic Approach in DeepwaterFlow Assurance Fluid Characterization. Paper SPE 71546 presented at the SPEAnnual Technical Conference and Exhibition, New Orleans, 30 September-3October. http://dx.doi.org/10.2118/71546-MS.
NAS 1638. 2001. Cleanliness Requirements of Parts Used inHydraulic Systems. Washington, DC: Aerospace Industries of America.
Ratulowski, J., Amin, A., Hammami, A., Muhammad, M., and Riding, M. 2004. Flow Assurance and SubseaProductivity: Closing the Loop With Connectivity and Measurements. PaperSPE 90244 presented at the SPE Annual Technical Conference and Exhibition,Houston, 26-29 September. http://dx.doi.org/10.2118/90244-MS.
SAE AS4059. 2001. Aerospace Fluid Power-Cleanliness Classification forHydraulic Fluids. Warrendale, Pennsylvania: Soc. of AutomotiveEngineers.
Shirah, A.D., Place, M.C. Jr., and Edwards, M.A. 2003a. Reliable Subsea Umbilical andDownhole Injection Systems Are an Integral Component of Successful FlowAssurance Programs. Paper SPE 84046 presented at the SPE Annual TechnicalConference and Exhibition, Denver, 5-8 October.http://dx.doi.org/10.2118/84046-MS.
Shirah, D., Edwards, M., and Willmon, J. 2003b. CapAssure Program:Maintaining Performance, Quality, Integrity, and Functionality in Subsea andDownhole Capillary Injection Systems. In the Champion TechnologiesTechnology Bull. (20 October).
Shirah, D., Willmon, J., MacArthur, B., and Mayfield, D. 2004. MedusaDeepwater Project: Identifying Flow Assurance Issues and Devising a Strategyfor Mitigation. Proc. of the 2nd Petromin Deepwater Conference, KualaLumpur, 18-20 May.
Yen, A., Yin, Y.R., and Asomaning, S. 2001. Evaluating Asphaltene Inhibitors:Laboratory Tests and Field Studies. Paper SPE 65376 presented at the SPEInternational Symposium on Oilfield Chemistry, Houston, 13-16 February.http://dx.doi.org/10.2118/65376-MS.
Young, W.S. 2002. Typhoon DevelopmentProject Overview. Paper OTC 14122 presented at the Offshore TechnologyConference, Houston, 6-9 May.