Comparison of Inflow Performance and Reliability of Open Hole Gravelpacks and Open Hole Stand-Alone Screen Completions

Burton, Robert C.; Hodge, Richard M.

doi:10.2118/135294-ms

Cited by 14 publications

(3 citation statements)

References 34 publications

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“…In open hole completions, there are no perforations but there are filter cake pinholes. These are localized clean-up areas on the filter cake due to non-uniform stimulation and unloading of the filter cake during production (Burton et al, 2010). Production through pinholes results in localized or concentrated flows like perforations in cased hole.…”

Section: Flux Model Requirements For Oh-sasmentioning

confidence: 99%

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A Well Flux Surveillance and Ramp-Up Method for Openhole Stand-Alone Screen Completion

Karaaslan

Wong

Soter

et al. 2020

Day 2 Tue, October 27, 2020

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Production and surveillance engineers need practical models to help balance out the reward of maximizing production and the risk of ramping-up the well too much that damages the completion. This paper presents a well flux surveillance method to monitor and ramp-up production for openhole stand-alone screen (OH-SAS) completion that optimizes production by considering risks of production impairment and screen erosion failure. The flux surveillance model for OH-SAS assumes the filter cake from drilling operations does not cleanup uniformly during fluids unloading and production. This leaves pinholes on the filter cake that cause concentrated flows. The flux model contains three components: (a) capture and describe input properties of pinhole, (b) link completion pressure drop of flows across filter cake region and through pinholes to surveillance results from pressure transient analyses, and (c) distribute fluxes in the SAS wellbore. The model uses three input parameters to describe the pinhole diameter and internal filter cake properties. They are determined as a system utilizing the laboratory return permeability test, computerized tomography scans of test samples, and computational fluid dynamics simulations. The completion pressure drop incorporates radial and hemispherical flows and captures the compounding skin effects of pinholes with internal filter cake. Flux distributions are modeled as a network system. This contains branches and nodes that incorporate radial and vertical flow resistances in the annular region of SAS. Application of filter cake properties and pressure transient analysis data showed the completion pressure drop as a function of flow rate is non-linear and higher with pinholes than without pinholes. By not incorporating pinholes in surveillance, operations can potentially limit ramp up when the completion pressure drop in the field is higher than predicted. Results from the network model showed the largest radial screen impingement velocity is at the top section of screen. The axial annular flow velocity or scouring velocity is two orders of magnitude larger than the screen impingement velocity. This warrants further considerations of wellbore enlargement and screen scouring erosion mechanisms due to the high axial annular flow.

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Section: Flux Model Requirements For Oh-sasmentioning

confidence: 99%

“…All above models mainly focus on cased hole gravel pack and fracpack applications. For openhole completions with sand control, the literature offers limited ramp-up surveillance references (Burton et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

A Well Flux Surveillance and Ramp-Up Method for Openhole Stand-Alone Screen Completion

Karaaslan

Wong

Soter

et al. 2020

Day 2 Tue, October 27, 2020

View full text Add to dashboard Cite

show abstract

“…Potential success of nonreactive fluids is predicated on the premise that only a limited filter cake removal albeit uniformly across the wellbore is required for optimum well production performance. Well productivity assessment model estimates that less than 5% filter cake removal is required in high permeability sandstone reservoir with a slotted liner completion 11,12 . The solids-free, post-cleanup displacement brine fluids will also reduce the risk of damage in wells that are temporarily suspended with low-solids oil-based DIF/completion fluid in the wellbore long before being cleaned up and brought on stream.…”

Section: Nonreactive Cleanup Fluidsmentioning

confidence: 99%

Evaluation of Nonreactive Aqueous Spacer Fluids for Oil-based Mud Displacement in Open Hole Horizontal Wells

et al. 2012

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Reactive mud cake breaker fluids in long open hole horizontal wells located across high permeability sandstone reservoirs has had limited success because they often induce massive fluid losses. The fluid losses are controlled with special pills, polymers and brine or water, causing well impairment that is difficult to remove when oil-based mud (OBM) drill-in fluids (DIFs) are used. This situation has resulted in the drive for an alternative cleanup fluid system that is focused on preventing excessive fluid leak off, maximizing the OBM displacement efficiency and allowing partial dispersion of the mud cake for ease of its removal during initial well production. The two-stage spacer application is composed of a nonreactive fluid system, which includes a viscous pill with nonionic surfactants, gel pill, completion brine and a solvent.Extensive laboratory evaluation was conducted at simulated reservoir conditions to evaluate the effectiveness of the OBM displacement fluid system. The study included dynamic high-pressure/high temperature (HP/HT) filter press tests and coreflood tests in addition to wettability alteration, interfacial tension and fluid compatibility tests.The spacer fluid parameters were optimized based on wellbore fluid hydraulic simulation and laboratory test results, which indicated minimal fluid leak off and a low risk of emulsion formation damage. Three well trials were conducted in a major offshore field sandstone reservoir drilled with OBM. All three trial wells (one single and two dual laterals), which were treated, have demonstrated improvement in production performance. This paper will discuss in detail the spacer fluids optimization process, laboratory work conducted and the successful field treatments performed.

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Optimized Filter Cake Breaker Successfully Used in the OH Completions in Yuralpa and Oso Fields

et al. 2013

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Oil provides 51% of Ecuador export earnings and a third of government revenue. Horizontal drilling has become an option to increase domestic oil production. The Yuralpa and Oso are land oil producer fields in Ecuador, which includes several wells. Some of the challenges include low pore pressure, sand control and the need of a filter cake breaker to enhance productivity. The reservoir drill-in fluid (RDF) and the breaker needed to be compatible, as well the operator required a breaker formulation that would not only allow the upper completion to be run before losing filtration control but also deliver superb productivity on completion after adequate soak time. It was also important that the solution as well required to be cost effective due to the low AFE that the operator had on the project. A water based breaker system, comprised of enzyme and chelant components, was chosen as the treatment selection. The thin RDF filtercake and the breaker treatment combination were tested in the laboratories to achieve an optimum technical and economical solution for the project. Due to environmental restrictions, sodium formate was used to provide density for drilling the horizontal hole section. After drilling, a mechanical and chemical wellbore clean up were performed, the pre-perforated liner was run, and the filter cake breaker was spotted at the open hole Potassium chloride brine was used as final completion fluid. Operations continue running in hole the upper completion assembly which some times includes an electric submersible pump (ESP). The usage of the novel breaker system allowed the project to achieve higher production rates than expected. Several wells have been successfully completed and put in production, all achieving or exceeding production expectations.

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Comparison of Inflow Performance and Reliability of Open Hole Gravelpacks and Open Hole Stand-Alone Screen Completions

Cited by 14 publications

References 34 publications

A Well Flux Surveillance and Ramp-Up Method for Openhole Stand-Alone Screen Completion

A Well Flux Surveillance and Ramp-Up Method for Openhole Stand-Alone Screen Completion

Evaluation of Nonreactive Aqueous Spacer Fluids for Oil-based Mud Displacement in Open Hole Horizontal Wells

Optimized Filter Cake Breaker Successfully Used in the OH Completions in Yuralpa and Oso Fields

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