Collaborative intervention advisory solution optimizes mature well production

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Africa, Onshore

An operator in West Africa faced production challenges from its mature wells—with issues ranging from high water cut to underperforming gas lift systems. Comprehensive visualization and reporting from the Intervention Advisor™ collaborative intervention method selection solution enabled the operator to compare potential intervention strategies, model various scenarios, and confidently select 11 wells for immediate intervention.

To combat waning field production, an operator launched a production enhancement program for 30 mature wells in West Africa. Ongoing production challenges included high water cut, sand production, underperforming gas lift systems, and viscous fluid production. In addition, the field had complex completions, including horizontal wells with autonomous inflow control devices (AICDs), and formations with thin oil rims.

The operator sought to maximize recovery through strategic well interventions. However, conventional communication methods and limited modeling tools made it impossible to achieve the desired production goals. The intricate dynamics of these wells required a more sophisticated approach. Recognizing the program’s constraints, the operator partnered with SLB for digital‑driven well intervention planning that would improve decision making and, ultimately, optimize production from its existing assets.

Backed by SLB domain expertise, the Intervention Advisor solution provided a collaborative environment to plan and derisk interventions in this mature field. The tool leveraged cutting-edge artificial intelligence and digital technologies to assess complexity, risk, cost, and ROI of various technologies and approaches. SLB conducted detailed simulations using Pipesim™ steady-state multiphase flow simulator, a simulator featuring advanced mechanistic models, heat transfer and PVT modeling, GIS map canvas, rapid well model building, and a parallel network solver. These simulations modeled horizontal wells with AICDs, providing different intervention scenarios, such as water shutoff, gas lift optimization, and well stimulation. Techlog™ wellbore software and Petrel™ subsurface software consolidated and analyzed wellbore data, supporting complex, multidomain workflows and facilitating better, faster decision making.

The Intervention Advisor solution served as the central repository for the entire workflow of the intervention program—enabling the operator to plan the sequence of steps, visualize multiple scenarios, select technologies, and simulate potential production gains. As a result of the detailed simulations and modeling, the operator selected 11 wells for intervention and continuous monitoring from SLB.

Intervention Advisor solution flow chart to compare intervention strategies and contingency plans.
Flow chart from Intervention Advisor solution comparing potential intervention strategies and contingency plans.
Intervention Advisor solution’s simulation comparison sample of potential intervention strategies.
In the initial assessment, significant scale formation was observed within the tubulars, and water production was detected from the lower zone. This preintervention case provides the baseline data necessary for evaluating the effectiveness of subsequent intervention methods aimed at estimating production gains. In the stimulation scenario, an intervention method involving cleanout and chemical stimulation treatment was proposed. The stimulation and gas lift scenario integrated multiple intervention techniques, including cleanout, chemical stimulation, and the installation of a gas lift system to enhance production by improving fluid flow and increasing efficiency. The final scenario proposed a comprehensive intervention strategy involving cleanout, mechanical water shutoff, chemical stimulation, and gas lift installation to address water intrusion issues, enhance stimulation effects, and optimize gas lift operations to maximize production gains.

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