FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2068851483> ?p ?o ?g. }

• W2068851483 endingPage "914" @default.
• W2068851483 startingPage "910" @default.
• W2068851483 abstract "The analysis described here, based on Santa Barbara Channel field experience, shows that increasing water depth reduces the overburden stress gradient, substantially influencing the apparent fracture gradient, particularly at shallow penetrations. Two methods of correlating fracture particularly at shallow penetrations. Two methods of correlating fracture gradient are presented in the analysis. Introduction The consideration of formation fracture gradients in selecting casing setting depths is fundamental to the preparation of an acceptable drilling program. When preparation of an acceptable drilling program. When Exxon Co. U.S.A. undertook the deepwater challenges of the Santa Barbara Channel, a project was initiated to develop a fracture-gradient prediction technique that would assess the impact of water depth. Development of the Technique Onshore Fracture Gradients As frequently referenced, Hubbert and Willis, established a theoretical basis for subsequent work in the development of actual fracture-gradient prediction techniques. Later theoretical studies of porous bodies have concluded that the most important factors affecting fracture initiation pressure are the overburden stress, the formation fluid pressure, and the horizontal-to-vertical stress ratio, whereas rock compressibilities and Poisson's ratio have relatively little influence. Matthews and Kelly, in a technique presented in 1967, correctly indicated that the stress ratio, F sigma, was the most significant and yet elusive variable. The following relation was presented for the fracture gradient: ..........................................(1) By assuming a total overburden gradient of 1.0 psi/ ft, we can estimate the effective vertical stress as follows: ..........................................(2) For normally pressured formations, the stress ratio, F sigma, is empirically correlated, on the basis of field data, for a given area as a function of depth. The onshore aspect of the technique that was developed for the Santa Barbara Channel area incorporates these stress-ratio concepts with a method to estimate the actual overburden gradient rather than using the assumed value of 1.0 psi/ft. Since the overburden stress at any depth should be the cumulative weight of the formations above that depth, well data that are indicative of formation density can be used to estimate overburden. Techniques have been published that are based on velocity data from seismic published that are based on velocity data from seismic surveys and sonic logs or that utilize formation bulk density logs directly. We selected the latter method and estimated overburden with Eq. 3: ..........................................(3) where 0.4335 is the constant used to convert units of gm/cc to psi/ft. In practice, of course, a simple arithmetic average of the bulk densities of the overlaying formations, pb, will suffice: ..........................................(4) The final form of the fracture-gradient prediction formula used in the Channel is given as Eq. 5: ..........................................(5) JPT P. 910" @default.
• W2068851483 created "2016-06-24" @default.
• W2068851483 creator A5029261063 @default.
• W2068851483 date "1973-08-01" @default.
• W2068851483 modified "2023-10-17" @default.
• W2068851483 title "Offshore Fracture Gradients" @default.
• W2068851483 doi "https://doi.org/10.2118/4133-pa" @default.
• W2068851483 hasPublicationYear "1973" @default.
• W2068851483 type Work @default.
• W2068851483 sameAs 2068851483 @default.
• W2068851483 citedByCount "39" @default.
• W2068851483 countsByYear W20688514832012 @default.
• W2068851483 countsByYear W20688514832014 @default.
• W2068851483 countsByYear W20688514832015 @default.
• W2068851483 countsByYear W20688514832018 @default.
• W2068851483 countsByYear W20688514832019 @default.
• W2068851483 countsByYear W20688514832020 @default.
• W2068851483 countsByYear W20688514832022 @default.
• W2068851483 crossrefType "journal-article" @default.
• W2068851483 hasAuthorship W2068851483A5029261063 @default.
• W2068851483 hasConcept C102579867 @default.
• W2068851483 hasConcept C111368507 @default.
• W2068851483 hasConcept C127313418 @default.
• W2068851483 hasConcept C127413603 @default.
• W2068851483 hasConcept C135628077 @default.
• W2068851483 hasConcept C138885662 @default.
• W2068851483 hasConcept C162284963 @default.
• W2068851483 hasConcept C187320778 @default.
• W2068851483 hasConcept C191897082 @default.
• W2068851483 hasConcept C192562407 @default.
• W2068851483 hasConcept C205093917 @default.
• W2068851483 hasConcept C21036866 @default.
• W2068851483 hasConcept C25197100 @default.
• W2068851483 hasConcept C2777201227 @default.
• W2068851483 hasConcept C2778414698 @default.
• W2068851483 hasConcept C30399818 @default.
• W2068851483 hasConcept C41895202 @default.
• W2068851483 hasConcept C43369102 @default.
• W2068851483 hasConcept C66938386 @default.
• W2068851483 hasConcept C78762247 @default.
• W2068851483 hasConcept C85676937 @default.
• W2068851483 hasConcept C98156149 @default.
• W2068851483 hasConceptScore W2068851483C102579867 @default.
• W2068851483 hasConceptScore W2068851483C111368507 @default.
• W2068851483 hasConceptScore W2068851483C127313418 @default.
• W2068851483 hasConceptScore W2068851483C127413603 @default.
• W2068851483 hasConceptScore W2068851483C135628077 @default.
• W2068851483 hasConceptScore W2068851483C138885662 @default.
• W2068851483 hasConceptScore W2068851483C162284963 @default.
• W2068851483 hasConceptScore W2068851483C187320778 @default.
• W2068851483 hasConceptScore W2068851483C191897082 @default.
• W2068851483 hasConceptScore W2068851483C192562407 @default.
• W2068851483 hasConceptScore W2068851483C205093917 @default.
• W2068851483 hasConceptScore W2068851483C21036866 @default.
• W2068851483 hasConceptScore W2068851483C25197100 @default.
• W2068851483 hasConceptScore W2068851483C2777201227 @default.
• W2068851483 hasConceptScore W2068851483C2778414698 @default.
• W2068851483 hasConceptScore W2068851483C30399818 @default.
• W2068851483 hasConceptScore W2068851483C41895202 @default.
• W2068851483 hasConceptScore W2068851483C43369102 @default.
• W2068851483 hasConceptScore W2068851483C66938386 @default.
• W2068851483 hasConceptScore W2068851483C78762247 @default.
• W2068851483 hasConceptScore W2068851483C85676937 @default.
• W2068851483 hasConceptScore W2068851483C98156149 @default.
• W2068851483 hasIssue "08" @default.
• W2068851483 hasLocation W20688514831 @default.
• W2068851483 hasOpenAccess W2068851483 @default.
• W2068851483 hasPrimaryLocation W20688514831 @default.
• W2068851483 hasRelatedWork W1991838861 @default.
• W2068851483 hasRelatedWork W1998800964 @default.
• W2068851483 hasRelatedWork W2039238052 @default.
• W2068851483 hasRelatedWork W2040780346 @default.
• W2068851483 hasRelatedWork W2367188225 @default.
• W2068851483 hasRelatedWork W2514516025 @default.
• W2068851483 hasRelatedWork W2989556452 @default.
• W2068851483 hasRelatedWork W3022487763 @default.
• W2068851483 hasRelatedWork W4294629149 @default.
• W2068851483 hasRelatedWork W763123230 @default.
• W2068851483 hasVolume "25" @default.
• W2068851483 isParatext "false" @default.
• W2068851483 isRetracted "false" @default.
• W2068851483 magId "2068851483" @default.
• W2068851483 workType "article" @default.