One Sack Rapid Mix and Pump Solution to Severe Lost Circulation

Clapper, Dennis; Szabo, Joseph J.; Spence, Steven P.; Otto, Michael; Creelman, Brian; Lewis, Tom G.; McGuffey, Gary

doi:10.2118/139817-ms

Cited by 13 publications

(4 citation statements)

References 5 publications

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“…1,2 According to the literature, worldwide leakage occurs for 20%-25% of the total number of wells, and the loss of nonreturn slurry accounts for more than 50% of the total loss well. [3][4][5] At present, a variety of loss circulation materials and methods have been formed to solve the problem of leakage, such as stable foams, cement, suspended particles, grouting materials, and gelled polymers. [6][7][8] Polymers gel is commonly used in the petroleum industry to block water and displacement oil.…”

Section: Introductionmentioning

confidence: 99%

Research on the rheological and flow characteristics of a supramolecular gel in fractures

Wang

Sun

Shen

et al. 2021

J of Applied Polymer Sci

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Loss circulation is one of the major concerns in drilling and well construction.An effective way to control drilling fluid loss and strengthen the wellbore is to plug fractures and holes with loss circulation materials. In this work, a hydrophobic association supramolecular hydrogel GP-A developed by n-dodecylacrylamide, methacrylamide and 2-acrylamide-2-methylpropylsulfonic acid was proposed as a potential lost circulation material for malignant drilling fluid loss. The results show that the initial decomposition temperature of GP-A was 172 C, and the flow characteristics conform to the Herschel-Bulkley model with yield stress. Microstructural analysis shows that GP-A gel with a 3D spatial network, and hydrogen bonds between branched chains form a dynamically recoverable structure. Based on POLYFLOW, the Phan Thien-Tanner model with viscoelastic parameters was used to simulate the viscoelastic flow characteristics of the fluid in fractures. The higher the concentration is, the greater K, and the higher the inlet driving pressure, while the nonlinear relationship between the driving pressure and the gel slug length is evident.

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Section: Introductionmentioning

confidence: 99%

Research on the rheological and flow characteristics of a supramolecular gel in fractures

Wang

Sun

Shen

et al. 2021

J of Applied Polymer Sci

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“…Such materials are typically classified as flakes, fibers, and granulars (calcium carbonate, mica, etc.). Recent strategies list a range of applications such as graphite, cross-linked pills, high fluid loss compression, or a blending of these materials in different concentrations [6,7]. Because of the high cost of drilling fluids, oil companies resort to a "sealing flow" technique by adding particles of selected granulometry to the drilling fluid itself, in hopes that the particles will settle along the fracture and eventually seal the leaking path, stopping the loss of drilling fluid [4,[8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Numerical Evaluation of CFD‐DEM Coupling Applied to Lost Circulation Control: Effects of Particle and Flow Inertia

Barbosa

Lai

Junqueira

2019

Mathematical Problems in Engineering

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In the present study, the transport and deposition of solid particles to mitigate the loss circulation of fluid through a fracture transversely placed to a vertical channel is numerically investigated. These solid particles (commonly known in the industry as lost circulation materials—LCMs) are injected into the flow during the drilling operation in the petroleum industry, in hopes to control the fluid loss. The numerical simulation of the process follows a two-stage process: the first characterizes the lost circulation flow and the second the particle injection. The numerical model comprises an Eulerian–Lagrangian approach, in which the dense discrete phase model (DDPM) is combined with the discrete element method (DEM). A parametric analysis is done by varying the vertical channel Reynolds number, the particle-to-fluid density ratio, and the particle diameter. Results are shown in terms of the particle’s bed geometric characteristics, focusing on the location inside the fracture where the particles deposit, and the particle bed length, height, and time spent to fill the fracture. Also monitored are the fluid loss reduction over time and the fractured channel bottom pressure (which can be related to the fracture pressure). Results indicate that using a slow/intermediate flow velocity, associated with heavy particles with small diameters, provides the best combination for the efficient mitigation of the fluid loss process.

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“…The created seal is strong enough to support high differential pressure and mechanical drilling stresses. Clapper et al (2011) describe special tests designed to test and evaluate such high-fluid-loss fluids.…”

Section: Introductionmentioning

confidence: 99%

Degradable Fiber Pill for Lost Circulation in Fractured Reservoir Sections

et al. 2014

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Lost circulation is one of the main causes of nonproductive time during drilling and impacts the success of cementing operations. Losses into the reservoir not only impact drilling, they potentially impact the reservoir, due to influx of quantities of drilling fluids that are potentially damaging, or will influence the production rate. Existing solutions are based mainly on particulates, which often are added to drilling fluids to plug fractures or to build up filtercake to cure fluid losses. When particulates are applied for curing losses in reservoir sections, it is desirable that the plugging materials maintain stability for sufficient time to allow well completion but eventually self-degrade to leave undamaged formation for future hydrocarbon production. The main challenges are the design of the lost-circulation material to cure losses into fractures of various widths and to provide plug stability and cleanup within a desired time frame over a broad bottomhole temperature range.Fibers have shown good fracture-plugging behavior. Parameters affecting fiber performance include, but are not limited to, fluid viscosity, fiber concentration, fiber geometry, flow rate, effect of the wall, and fracture width. To effectively apply fibers as lost-circulation applications, a novel, fiber-laden fluid was designed for easy preparation on surface, allowing compatibility with bottomhole assemblies (BHAs). The decrease in velocity inside the fracture enables fibers to bridge and then plug the fracture, thus regaining circulation. The fibers are specially designed to degrade in an adjustable time frame sufficient to ensure plug stability until the well is completed. With time, the plug undergoes further degradation, leading to nondamaged formation for production.This novel degradable solution has been successfully proven during field trials in various drilling scenarios ranging from severe to total losses with effective and efficient loss mitigation, without issues on placement through BHA and bit nozzles, and mitigating further reservoir damage.

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One Sack Rapid Mix and Pump Solution to Severe Lost Circulation

Cited by 13 publications

References 5 publications

Research on the rheological and flow characteristics of a supramolecular gel in fractures

Research on the rheological and flow characteristics of a supramolecular gel in fractures

Numerical Evaluation of CFD‐DEM Coupling Applied to Lost Circulation Control: Effects of Particle and Flow Inertia

Degradable Fiber Pill for Lost Circulation in Fractured Reservoir Sections

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