Completion and Stimulation Methodology for Long Horizontal Wells in Lower Permeability Carbonate Reservoirs

Jackson, Alfred; Azizi, Badr Al; Kofoed, Curtis; Shuchart, Chris E.; Keller, Stuart Ronald; Sau, Rajes; Grubert, Marcel; Phi, Mike Van

doi:10.2118/161527-ms

Cited by 11 publications

(3 citation statements)

References 6 publications

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“…Due to this increased amount of overhead, coupling is only undertaken when the increase in accuracy justifies the additional cost. Therefore, the most common uses of such coupled models are in the following situations (Jackson et al, 2012): 1) When the completion has a direct impact on reservoir performance and overall field recovery (e.g. annular flow impacts on performance).…”

Section: Coupling Dynamic and Static Simulatorsmentioning

confidence: 99%

Downhole flow controllers in mitigating challenges of long reach horizontal wells: A practical outlook with case studies

Chammout¹,

Ghosh²,

Alklih³

2017

J. Petroleum Gas Eng.

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Production and injection in long reach horizontal wells pose several challenges in production optimization, flow assurance and reservoir management. Horizontal wells are known to be superior to vertical wells in terms of productivity, however, they are also susceptible to early water and/or gas cut production due to the heel-toe effect and/or permeability contrasts. Uniform distribution of water injection into all zones can also be a challenge in case of high-permeability streaks and fractures. To negate some of the adverse reservoir properties and to control the flow profile of production and injection fluids, downhole flow control devices are increasingly in use and beneficial in regulating flow, improved overall reservoir sweep, improved productivity from the tail section of the well and reduced water coning or gas cusping. Wellbore hydraulics for a long reach well completed with downhole valves have great influence on the reservoir performance and recovery in the long run. This paper presents a discussion aimed at better understanding of the critical challenges that long reach horizontal wells are prone to in terms of completion, as well as the developments so-far that have been applied to capture the physics across the long horizontal section. Three case studies are also discussed with some details emphasizing practical experiences of such wells.

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Section: Coupling Dynamic and Static Simulatorsmentioning

confidence: 99%

Downhole flow controllers in mitigating challenges of long reach horizontal wells: A practical outlook with case studies

Chammout¹,

Ghosh²,

Alklih³

2017

J. Petroleum Gas Eng.

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“…Previously, a variety of completion designs were reviewed and their advantages and disadvantages were summarized for possible application in the entire field and also specifically for Pilot Well 5 6 . Completions with ICDs were not considered due to the low production rates expected.…”

Section: Completion Strategymentioning

confidence: 99%

Advanced Completion and Stimulation Design Model for Maximum Reservoir Contact Wells

Shuchart

Grubert

2014

Day 3 Wed, November 12, 2014

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This paper introduces a novel computational simulator for advanced completion and stimulation design of Maximum Reservoir Contact (MRC) wells. Using innovative computational algorithms, this simulator models numerous challenging physics of acid stimulation and transient injection of multiple fluids through openhole complex completions, e.g. Limited-Entry Liners (LEL) and Inflow Control Devices (ICD) in MRC wells. LEL hole or ICD nozzle diameter, hole distributions, and packers are explicitly modeled as part of the completion. The fast, robust simulator tracks concentrations and models flow of multiple fluids while explicitly accounting for completion and formation pressure drops along the lateral and transient reservoir dynamics. Fluid invasion and stimulation distribution (wormhole and skin) along the lateral are computed by the simulator which is coupled with a dynamic wormhole model.A case history of the model application is presented. The model was used to design a limited-entry liner with 4 mm holes distributed non-uniformly among 12 compartments. The liner enabled successful high-rate bullhead stimulation of an 11,500-ft lateral, resulting in reduced cost, limited risk, and elimination of the need for coiled tubing. Model validation and calibration against the field data is discussed. Detailed evaluation of the well data suggests successful stimulation of the entire lateral and production uplift from every compartment.The paper presents a novel, fast simulator to model transient fluid placement through complex completions in MRC wells. The capability to robustly model a complex completion in long openhole laterals has enabled the design of successful bullhead acid stimulation through a limited entry liner. Apart from acid stimulation design, the simulator also provides capabilities to model various well injection processes in sandstone and carbonate reservoir, such as scale squeezes, solvent treatments, and HF acid treatments.

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“…The paper also discusses the first application of this technology to design the completion and stimulation of a long horizontal openhole with 11, 500 ft completion interval, drilled in a lower permeability area of a large oil field offshore Abu Dhabi 6 . To achieve production at sufficient rates, increasing reservoir contact through longer laterals and effective stimulation is critical.…”

Section: Introductionmentioning

confidence: 99%

An Integrated Software Technology Based on Research and Field Application for Completion, Stimulation and Fluid Placement Design in Complex Wells

Goodrow

Rockwell

et al. 2014

All Days

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Today, many wells all over the world are being completed with long intervals and complex completion equipment, such as limited-entry liners (LEL) and inflow control devices (ICDs). Accurate predictions and understanding of fluid placement during stimulation or injection operations through these complex completions can be quite challenging. This paper presents an integrated software technology based on research and field application for advanced completion, stimulation and fluid placement design of complex wells. The crux of the software is a novel and robust computational modeling simulator. Using innovative computational algorithms, this simulator models numerous challenging physics of acid stimulation and transient injection of multiple fluids through openhole complex completions, e.g. LEL and ICDs in long wells. LEL hole or ICD nozzle diameter, hole distributions, and packers are modeled as part of the completion while explicitly tracking multiple fluid concentrations and accounting for completion and formation pressure drops along the lateral and transient reservoir dynamics. Fundamental understanding of fluid placement is achieved through this stable and accurate computational model supported by experiments. Large-scale experiments have been performed to validate the model and understand the annular fluid displacement of multiple fluids through complex liner designs. Fluid invasion and stimulation distribution (wormhole and skin) along the lateral are computed by the simulator, which is coupled with a dynamic wormhole model. In addition to acid stimulation design, the software also provides capabilities to model various well injection processes in sandstone and carbonate reservoirs, such as scale squeezes, solvent treatments, and HF acid treatments along with corresponding productivity uplift estimates.The integration of the computational model into proprietary subsurface software is achieved through an accelerated technology delivery process involving engineering researchers, software developers/ computational scientists, and end-users in the field. The software creates a distinct advantage by giving engineers in the field the capability to quickly perform these analyses, which can lead to reduced overall development and operation costs, increased individual well productivity, and most importantly the capture of additional reserves.A case history of the model application will be presented. The model was used to design a limited-entry liner with 4 mm holes distributed non-uniformly among 12 compartments. The liner enabled successful high-rate bullhead stimulation of an 11, 500-ft lateral, resulting in reduced cost, limited risk, and elimination of the need for coiled tubing. The field data is used to validate the model predictions and calibrate model parameters.

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Completion and Stimulation Methodology for Long Horizontal Wells in Lower Permeability Carbonate Reservoirs

Cited by 11 publications

References 6 publications

Downhole flow controllers in mitigating challenges of long reach horizontal wells: A practical outlook with case studies

Downhole flow controllers in mitigating challenges of long reach horizontal wells: A practical outlook with case studies

Advanced Completion and Stimulation Design Model for Maximum Reservoir Contact Wells

An Integrated Software Technology Based on Research and Field Application for Completion, Stimulation and Fluid Placement Design in Complex Wells

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