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AuthorMahmoud H.
AuthorAlhajabdalla M.
AuthorNasser M.S.
AuthorHussein I.A.
AuthorAhmed R.
AuthorKarami H.
Available date2022-04-25T10:59:43Z
Publication Date2021
Publication NameJournal of Petroleum Science and Engineering
ResourceScopus
Identifierhttp://dx.doi.org/10.1016/j.petrol.2020.108337
URIhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85098782708&doi=10.1016%2fj.petrol.2020.108337&partnerID=40&md5=e92356aadd4a3f2f082a8e5724b0203e
URIhttp://hdl.handle.net/10576/30382
AbstractFor efficient drilling operations, cuttings transport within the oil and gas wellbore is fundamental. Inadequate hole cleaning results in many problems including reduced rate of penetration, increased torque, bit wearing, and stuck pipe. The addition of fiber aids the cleaning performance of drilling sweep with a minor change in fluid rheology. However, our understanding of this complex fluid is very limited. Especially, the impact of polymer anionicity (solution negative charge density) on the hole cleaning performance of these fluids has not been investigated. The objective of this work is to examine the effect of anionicity and fiber on cutting carrying capacity of polymeric suspensions. This study presents results of an experimental study conducted on the settling behavior of fine cuttings in base fluids with the addition of polymers such as xanthan gum (XG), carboxymethyl cellulose (CMC), and polyanionic cellulose (PAC), and inert fibers. Moreover, the effect of cutting sizes (0.125 and 0.250 mm) was also assessed. Results showed that, in addition to the viscosity, the anionicity of base polymer influences the carrying capacity of the suspensions. The increase in anionicity improved the cutting carrying capacity of suspensions as indicated by Total Suspended Solids (TSS) measurements. The improvement of carrying capacity due to polymer anionicity is because of increased particle-particle and particle-polymer repulsion forces. Besides this, a small amount of fiber (0.08%) added to the base fluids enhanced the carrying capacity with minimal effect on fluid rheology. The enhancement due to fiber originates from the mechanical hindering effect of the fiber network and hydrodynamic interactions between cuttings and fibers. This study findings reveal that the hole cleaning performance of water-based drilling fluids with fine cuttings (0.063?0.500 mm) can be improved by increasing base fluid anionicity and adding fibers.
SponsorThis work was made possible by the support of a National Priorities Research Program (NPRP) grant from the Qatar National Research Fund (QNRF) , grant reference number NPRP11S-1228 170140 . We would like to recognize Central Laboratory Unit (CLU) at Qatar University for carrying out the SEM-EDX test. The statements made herein are solely the responsibility of the authors. This work was also supported by Qatar national Library . Open Access funding provided by the Qatar National Library .
Languageen
PublisherElsevier B.V.
SubjectBoreholes
Cellulose
Cleaning
Drilling fluids
Elasticity
Fibers
Infill drilling
Oil wells
Petroleum transportation
Xanthan gum
Addition of polymer
Carboxymethyl cellulose
Drilling operation
Hydrodynamic interaction
Polymeric suspensions
Rate of penetration
Total suspended solids
Water based drilling fluids
Suspensions (fluids)
carrying capacity
colloid
drilling
hydrocarbon reservoir
reservoir characterization
rheology
settling behavior
Carboxymethyl Cellulose
Cleaning
Elasticity
Fibers
Xanthan Gum
TitleSettling behavior of fine cuttings in fiber-containing polyanionic fluids for drilling and hole cleaning application
TypeArticle
Volume Number199
dc.accessType Abstract Only


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