Drill Cuttings, Petrophysical, and Geomechanical Models for Evaluation of Conventional and Unconventional Petroleum Reservoirs
Notice bibliographique
Résumé
This thesis concentrates on some of the aspects of a ‘Total Petroleum System’ including natural gas and oil stored in conventional and unconventional reservoirs. The original contributions of this thesis include: 1) The use of electromagnetic mixing rules for construction of dual and triple porosity models with a view to quantifying matrix, fracture and non-effective porosity and the porosity exponent (m) of naturally fractured reservoirs. 2) The use of electromagnetic mixing rules for construction of dual and triple porosity models with a view to quantify the water saturation exponent (n) and to estimate the wettability of reservoir rocks in naturally fractured reservoirs. 3) Measurements of porosity and permeability in drill cuttings collected directly in a horizontal well. Although these measurements have been carried out previously in drill cuttings collected in vertical and deviated wells, this is the first time that they are performed in horizontal well drill cuttings. The models developed in Items 1 and 2 are compared successfully against core laboratory data. Water and/or oil stored in each of the porous media considered in the models, affects rock wettability and consequently the values of n. Robustness of the models is important because, in practice, while logging a well in a naturally fractured reservoir, the tool will probably go through some intervals with only matrix porosity; some intervals with matrix porosity and fractures, some with matrix porosity and isolated porosity; and some intervals with matrix, fractures and non-connected porosities. As there are variations in the contribution of each porosity system with depth, there are also variations in m with depth that have to be taken into account. The laboratory measurements of porosity and permeability from drill cuttings mentioned above in Item 3 were conducted at the University of Calgary. Based on a thorough review of literature this is the first time that this measurements are conducted in drill cuttings samples collected in horizontal wells. Starting with only drill cuttings measurements of porosity and permeability, the methodology developed in this thesis allows for complete formation evaluation and geomechanical analysis through the use of a successive approach for determination of several parameters of interest including pore throat aperture radius (rp35), water saturation, porosity exponent (m), true formation resistivity, capillary pressure, Knudsen number, depth to the water contact (if present), construction of Pickett plots, Young’s Modulus, Poisson’s ratio and brittleness index throughout the horizontal length of the well, and for locating the best hydraulic fracture initiation points during multi-stage fracturing jobs. It is concluded that the use of electromagnetic mixing rules and drill cuttings provide a valuable and practical addition for quantitative characterization of conventional and unconventional petroleum reservoirs.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction machine sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Le volet Gemma est une étiquette directe du modèle pour chaque travail de la base, lue sur la notice réduite au titre. Le volet Codex est un classifieur appris des 10 348 étiquettes directes de Codex et calibré sur les taux pondérés de l'échantillon; les champs sans appui suffisant ne portent aucun appel Codex. Le mode candidate est l'union des deux volets; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont pas des étiquettes humaines.
Scores du classifieur distillé par catégorie (deux têtes)
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,002 |
| Méta-épidémiologie (sens strict) | 0,001 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,001 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,001 | 0,001 |
| Science ouverte | 0,001 | 0,000 |
| Intégrité de la recherche | 0,001 | 0,001 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,001 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule source (Gemma direct ou Codex distillé), pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».