Matches in SemOpenAlex for { <https://semopenalex.org/work/W2026308512> ?p ?o ?g. }
Showing items 1 to 87 of
87
with 100 items per page.
- W2026308512 abstract "Abstract Borehole electrical images have very high vertical and azimuthal resolution, and thus have proved to be of paramount importance over the past 10 years in assessing formation layering and internal organization. Standard openhole log measurements (e.g., density or photoelectric factor) have also experienced improvements in accuracy and vertical resolution. These improvements are the result of more compact integrated tools and the systematic use of accelerometer-based speed corrections and inclinometry devices to measure the orientation of sensors within the borehole. Recent advances in nuclear magnetic resonance (NMR) logging have also cast a new light on petrophysical evaluation, especially on continuous permeability logs. The technique proposed in this paper combines information from borehole images and advanced petrophysical logs in a two-step approach. In the first step, a transform or relation is established between two oriented borehole measurements. For example, the transform is computed between azimuthal resistivity from an imaging tool and a high-resolution density measurement, conditioned on the readings of nondirectional volumetric measurements such as neutron porosity, gamma ray and image-derived textural indicators. This transform, which is in most cases inherently nonlinear, is not explicitly determined. Rather, it is approximated by an artificial neural network, which is trained over key representative facies zones. As a quality control step, the procedure uses the resistivity and other measurements to compute a synthetic density curve. This is compared to the actual density log, and error bars are attached to the reconstruction process. In the second step, the same transform is then applied to each available azimuthal resistivity channel (column in the electrical image) to reconstruct a quantitative density image on the borehole wall from these reconstructed density channels. The same approach provides a method to interpret a permeability curve from NMR data. The recorded orientation of the CMR* Combinable Magnetic Resonance tool skid enables a transform to be established between NMR-derived permeability and azimuthal resistivity, azimuthal density and nondirectional volumetric measurements (neutron porosity, gamma ray and textural indicators). Reconstructed permeability images can then be obtained by applying the transform to the full suite of image channel data. The proposed technique is illustrated with examples from clastic and carbonate formations. It provides a powerful means to better understand permeability variations in heterogeneous formations." @default.
- W2026308512 created "2016-06-24" @default.
- W2026308512 creator A5015781907 @default.
- W2026308512 creator A5016896623 @default.
- W2026308512 creator A5056672761 @default.
- W2026308512 date "1999-10-03" @default.
- W2026308512 modified "2023-09-27" @default.
- W2026308512 title "Reconstructing Petrophysical Borehole Images: Their Potential for Evaluating Permeability Distribution in Heterogeneous Formations" @default.
- W2026308512 cites W2066645054 @default.
- W2026308512 cites W2075282116 @default.
- W2026308512 cites W2117688670 @default.
- W2026308512 doi "https://doi.org/10.2118/56786-ms" @default.
- W2026308512 hasPublicationYear "1999" @default.
- W2026308512 type Work @default.
- W2026308512 sameAs 2026308512 @default.
- W2026308512 citedByCount "2" @default.
- W2026308512 crossrefType "proceedings-article" @default.
- W2026308512 hasAuthorship W2026308512A5015781907 @default.
- W2026308512 hasAuthorship W2026308512A5016896623 @default.
- W2026308512 hasAuthorship W2026308512A5056672761 @default.
- W2026308512 hasConcept C120665830 @default.
- W2026308512 hasConcept C120882062 @default.
- W2026308512 hasConcept C121332964 @default.
- W2026308512 hasConcept C125171110 @default.
- W2026308512 hasConcept C127313418 @default.
- W2026308512 hasConcept C150560799 @default.
- W2026308512 hasConcept C159719176 @default.
- W2026308512 hasConcept C159737794 @default.
- W2026308512 hasConcept C163716698 @default.
- W2026308512 hasConcept C165205528 @default.
- W2026308512 hasConcept C187320778 @default.
- W2026308512 hasConcept C2524010 @default.
- W2026308512 hasConcept C2776867696 @default.
- W2026308512 hasConcept C33556824 @default.
- W2026308512 hasConcept C33923547 @default.
- W2026308512 hasConcept C34527478 @default.
- W2026308512 hasConcept C35817400 @default.
- W2026308512 hasConcept C41625074 @default.
- W2026308512 hasConcept C46293882 @default.
- W2026308512 hasConcept C54355233 @default.
- W2026308512 hasConcept C6363049 @default.
- W2026308512 hasConcept C6648577 @default.
- W2026308512 hasConcept C77928131 @default.
- W2026308512 hasConcept C8058405 @default.
- W2026308512 hasConcept C86803240 @default.
- W2026308512 hasConceptScore W2026308512C120665830 @default.
- W2026308512 hasConceptScore W2026308512C120882062 @default.
- W2026308512 hasConceptScore W2026308512C121332964 @default.
- W2026308512 hasConceptScore W2026308512C125171110 @default.
- W2026308512 hasConceptScore W2026308512C127313418 @default.
- W2026308512 hasConceptScore W2026308512C150560799 @default.
- W2026308512 hasConceptScore W2026308512C159719176 @default.
- W2026308512 hasConceptScore W2026308512C159737794 @default.
- W2026308512 hasConceptScore W2026308512C163716698 @default.
- W2026308512 hasConceptScore W2026308512C165205528 @default.
- W2026308512 hasConceptScore W2026308512C187320778 @default.
- W2026308512 hasConceptScore W2026308512C2524010 @default.
- W2026308512 hasConceptScore W2026308512C2776867696 @default.
- W2026308512 hasConceptScore W2026308512C33556824 @default.
- W2026308512 hasConceptScore W2026308512C33923547 @default.
- W2026308512 hasConceptScore W2026308512C34527478 @default.
- W2026308512 hasConceptScore W2026308512C35817400 @default.
- W2026308512 hasConceptScore W2026308512C41625074 @default.
- W2026308512 hasConceptScore W2026308512C46293882 @default.
- W2026308512 hasConceptScore W2026308512C54355233 @default.
- W2026308512 hasConceptScore W2026308512C6363049 @default.
- W2026308512 hasConceptScore W2026308512C6648577 @default.
- W2026308512 hasConceptScore W2026308512C77928131 @default.
- W2026308512 hasConceptScore W2026308512C8058405 @default.
- W2026308512 hasConceptScore W2026308512C86803240 @default.
- W2026308512 hasLocation W20263085121 @default.
- W2026308512 hasOpenAccess W2026308512 @default.
- W2026308512 hasPrimaryLocation W20263085121 @default.
- W2026308512 hasRelatedWork W1998418922 @default.
- W2026308512 hasRelatedWork W2026308512 @default.
- W2026308512 hasRelatedWork W2037627549 @default.
- W2026308512 hasRelatedWork W2042481767 @default.
- W2026308512 hasRelatedWork W2043014806 @default.
- W2026308512 hasRelatedWork W2385941162 @default.
- W2026308512 hasRelatedWork W2891809352 @default.
- W2026308512 hasRelatedWork W2900168611 @default.
- W2026308512 hasRelatedWork W3198100288 @default.
- W2026308512 hasRelatedWork W4317815138 @default.
- W2026308512 isParatext "false" @default.
- W2026308512 isRetracted "false" @default.
- W2026308512 magId "2026308512" @default.
- W2026308512 workType "article" @default.