Mature Fields and Well Revitalization
Maximizing production from brownfields and extending the plateau have become utmost priorities for exploration-and-production companies the world over. This calls for a synergistic approach involving close coordination of various disciplines—subsurface, surface, well drilling and completions, and facilities engineering—to achieve the common goal of maximizing production and recovery. There is a growing awareness that maximizing field production involves not only having a clear understanding of subsurface intricacies but also ensuring that existing surface facilities are performing at their best to handle production in an environmentally safe manner. Many papers presented during the past year at SPE conferences and surveyed for this review address these issues.
Infill drilling and optimization of ongoing waterflood are two activities planned for revitalization of mature fields. Drilling through differentially depleted, multilayered reservoirs and the untapped deeper zones is a challenging task. Robust knowledge of rock properties, formation pressures, magnitude of in-situ stresses, and their evolution with production and depletion is essential for successful drilling of new wells in the redevelopment of mature fields. It is necessary to apply several tools to identify locations of bypassed oil and corroborate the findings of these tools before making a final decision. This becomes even more challenging when there is low resistivity contrast, such as in freshwater environments or in certain cases where openhole logging is not possible because of poor borehole conditions. Operators have calibrated numerical-simulation models successfully with innovative logging tools to locate and produce new oil from old fields.
Rejuvenation of mature assets plays a crucial role in the current low-oil-price scenario, allowing for improved production with limited investments and risks. Nevertheless, brownfield rejuvenation is often very demanding in terms of complex integrated reservoir studies, which typically take several months to complete. The new and emerging technology of applying analytical and data-driven models provides fast solutions to diagnose ongoing waterflooding processes effectively and examine low-cost strategies to improve areal- and vertical-sweep efficiencies.
This Month's Technical Papers
Recommended Additional Reading
SPE 184902 Effects of Pressure Depletion on Stress-Field and Casing-Load Alteration in Mature Fields: A Case Study by Peng Zhang, Halliburton, et al.
SPE 185412 Effective Waterflood Management in Complex Carbonate Reservoir of Mumbai High Field by N.T. Ravi, ONGC, et al.
SPE 186004 Developing Infill and EOR Opportunities While Managing Subsurface Uncertainties in a Mature Complex Field Using Probabilistic Dynamic Modeling by R. Abd Karim, Petronas, et al.
Mature Fields and Well Revitalization
R.V. Marathe, SPE, Consultant
01 January 2018
Norway’s Record Offshore License Award Attracts Major Operators
The company’s 31 licenses highlight a record-high total awarded during the latest APA round, which is aimed at developing mature areas of the NCS.
Can Additive Manufacturing Breathe New Life Into Aging Assets?
Additive layer manufacturing technology has gained prominence in the aerospace sector and is being used for the rapid production of prototype parts. Its credibility has quite literally “taken off” and is now used to build in-flight production components for aircraft.
Novel Brownfield-Rejuvenation Approach Uses Near-Wellbore-Saturation Monitoring
Fields in the Upper Assam-Arakan Basin have been studied intensely to find prospective sweet spots, perforation intervals for new wells, and potential workover candidates. These forecasts, guided only by dynamic-numerical-model results, have had mixed results when implemented in the field.
Don't miss out on the latest technology delivered to your email weekly. Sign up for the JPT newsletter. If you are not logged in, you will receive a confirmation email that you will need to click on to confirm you want to receive the newsletter.
16 April 2018