FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2892883854> ?p ?o ?g. }

• W2892883854 abstract "Drilling a stable geothermal well that experiences least drilling challenges is key to delivering a successful well that meets the set objective of either being a production or reinjection well. Wellbore instabilities encountered during drilling can add to the overall cost of the well by consumption of more materials and extension of well completion time. Olkaria geothermal field in Kenya is a high temperature field and wells are designed with 20 Surface Casing, 13⅜ Anchor Casing, 9⅝ Production Casing and the production section is lined with 7 perforated Liner. Drilling progress is affected by various downhole challenges such as loss of drilling fluid circulation and borehole wall collapse that lead to stuck drilling string, problems in landing casings and liners and in extreme cases loss of irretrievable part of drill string and abandonment of the well. Well sections with less drilling problems affecting drilling progress have high percentage of time spent on drilling activity but wells that encountered downhole challenges have less drilling time compared to other activities that do not add to the well depth.Geothermal wells in Olkaria at well pad OW-731 and well RN-33 in Reykjanes Iceland have been used in this report. Reassessment of minimum casing setting depths for 3000 m deep Olkaria wells was made according to the The African Union Code of Practice for Geothermal Drilling (2016). The criteria applied for this report was for the formation temperature and pressure to follow the boiling pressure for depth (BPD) curve based on a water level at 700 m and the effective containment pressure resulting to a vertical Production Casing depth of 1450 m. The pressure pivot point is lacking in the directional well indicating need for a deeper production casing setting depth. Minimum stress〖 S〗_h calculated using Eaton´s formula and overburden stress S_v form the maximum and minimum field stresses used to calculate effective hoop, radial and vertical stresses on the wellbore wall. Maximum compressive hoop stress occurs at 90° and 270° and minimum hoop stress at 0° and 180° in vertical well indicating the direction of minimum and maximum horizontal stresses measured clockwise from North (0° azimuth). In directional wells, the hoop stresses are dependent on the well inclination and azimuth. Directional wells at OW-731 pad are inclined to approximately 20° from the vertical at different azimuths but indicate difference effective stresses. Well RN-33 with an inclination angle of 30° at azimuth of 171° has the highest hoop stresses at 96°/276° followed by OW-731D (200°), OW-731B (225°), OW-731A (135°) and OW-731C (270°) with the least measured clockwise from North (0° azimuth).Mohr´s circle diagrams using effective stresses at different depths and drilling fluid densities 0, 500, 800, 1000 1200 and 1800 Kg/m3, indicate compressive failure that induces wellbore collapse during loss of circulation at all depths. Tensile failure that can result in fracturing occurs in all depths at 1.8 SG because of high radial…" @default.
• W2892883854 created "2018-10-05" @default.
• W2892883854 creator A5066981140 @default.
• W2892883854 date "2018-06-01" @default.
• W2892883854 modified "2023-09-27" @default.
• W2892883854 title "Wellbore stability : principles and analysis in geothermal well drilling" @default.
• W2892883854 cites W1550822980 @default.
• W2892883854 cites W1562546152 @default.
• W2892883854 cites W1983772425 @default.
• W2892883854 cites W1987047668 @default.
• W2892883854 cites W2009420010 @default.
• W2892883854 cites W2043612178 @default.
• W2892883854 cites W2116982362 @default.
• W2892883854 cites W2127534363 @default.
• W2892883854 cites W2168208775 @default.
• W2892883854 cites W2182045031 @default.
• W2892883854 cites W2183628904 @default.
• W2892883854 cites W2185419161 @default.
• W2892883854 cites W2469808523 @default.
• W2892883854 cites W258311243 @default.
• W2892883854 cites W2587089977 @default.
• W2892883854 cites W2894847938 @default.
• W2892883854 cites W3012983496 @default.
• W2892883854 cites W3128978303 @default.
• W2892883854 cites W3152227320 @default.
• W2892883854 cites W629479456 @default.
• W2892883854 cites W631116697 @default.
• W2892883854 hasPublicationYear "2018" @default.
• W2892883854 type Work @default.
• W2892883854 sameAs 2892883854 @default.
• W2892883854 citedByCount "0" @default.
• W2892883854 crossrefType "journal-article" @default.
• W2892883854 hasAuthorship W2892883854A5066981140 @default.
• W2892883854 hasConcept C111766609 @default.
• W2892883854 hasConcept C127313418 @default.
• W2892883854 hasConcept C127413603 @default.
• W2892883854 hasConcept C141813653 @default.
• W2892883854 hasConcept C150560799 @default.
• W2892883854 hasConcept C152068911 @default.
• W2892883854 hasConcept C16674752 @default.
• W2892883854 hasConcept C187320778 @default.
• W2892883854 hasConcept C25197100 @default.
• W2892883854 hasConcept C2779402677 @default.
• W2892883854 hasConcept C2779439521 @default.
• W2892883854 hasConcept C2779538338 @default.
• W2892883854 hasConcept C2781233791 @default.
• W2892883854 hasConcept C30399818 @default.
• W2892883854 hasConcept C42222113 @default.
• W2892883854 hasConcept C58059514 @default.
• W2892883854 hasConcept C78519656 @default.
• W2892883854 hasConcept C78762247 @default.
• W2892883854 hasConcept C8058405 @default.
• W2892883854 hasConceptScore W2892883854C111766609 @default.
• W2892883854 hasConceptScore W2892883854C127313418 @default.
• W2892883854 hasConceptScore W2892883854C127413603 @default.
• W2892883854 hasConceptScore W2892883854C141813653 @default.
• W2892883854 hasConceptScore W2892883854C150560799 @default.
• W2892883854 hasConceptScore W2892883854C152068911 @default.
• W2892883854 hasConceptScore W2892883854C16674752 @default.
• W2892883854 hasConceptScore W2892883854C187320778 @default.
• W2892883854 hasConceptScore W2892883854C25197100 @default.
• W2892883854 hasConceptScore W2892883854C2779402677 @default.
• W2892883854 hasConceptScore W2892883854C2779439521 @default.
• W2892883854 hasConceptScore W2892883854C2779538338 @default.
• W2892883854 hasConceptScore W2892883854C2781233791 @default.
• W2892883854 hasConceptScore W2892883854C30399818 @default.
• W2892883854 hasConceptScore W2892883854C42222113 @default.
• W2892883854 hasConceptScore W2892883854C58059514 @default.
• W2892883854 hasConceptScore W2892883854C78519656 @default.
• W2892883854 hasConceptScore W2892883854C78762247 @default.
• W2892883854 hasConceptScore W2892883854C8058405 @default.
• W2892883854 hasLocation W28928838541 @default.
• W2892883854 hasOpenAccess W2892883854 @default.
• W2892883854 hasPrimaryLocation W28928838541 @default.
• W2892883854 hasRelatedWork W2119552772 @default.
• W2892883854 hasRelatedWork W2219379028 @default.
• W2892883854 hasRelatedWork W2349906099 @default.
• W2892883854 hasRelatedWork W2351292128 @default.
• W2892883854 hasRelatedWork W2353590195 @default.
• W2892883854 hasRelatedWork W2358948034 @default.
• W2892883854 hasRelatedWork W2362421742 @default.
• W2892883854 hasRelatedWork W2362721691 @default.
• W2892883854 hasRelatedWork W2365480237 @default.
• W2892883854 hasRelatedWork W2366616186 @default.
• W2892883854 hasRelatedWork W2369424269 @default.
• W2892883854 hasRelatedWork W2370059485 @default.
• W2892883854 hasRelatedWork W2375895996 @default.
• W2892883854 hasRelatedWork W2389778687 @default.
• W2892883854 hasRelatedWork W2392081207 @default.
• W2892883854 hasRelatedWork W2740562430 @default.
• W2892883854 hasRelatedWork W2977351982 @default.
• W2892883854 hasRelatedWork W2557324743 @default.
• W2892883854 hasRelatedWork W2821260346 @default.
• W2892883854 hasRelatedWork W2978079378 @default.
• W2892883854 isParatext "false" @default.
• W2892883854 isRetracted "false" @default.
• W2892883854 magId "2892883854" @default.
• W2892883854 workType "article" @default.