Drilling Unique Wells
Notice bibliographique
Résumé
Abstract Drilling engineers can choose from a wide variety of tools and technologies, but designing the right drilling system may mean the difference between success and failure in many complicated applications. Every major oil-bearing area in the world comes with unique drilling challenges, which can be categorized in many ways. One grouping might be described as drilling the overburden or drilling the reservoir. Another grouping might be vertical vs. horizontal, and yet another might be exploration vs. development. The drilling challenge in any of these classifications becomes unique when it hinders the competitiveness of the project as it increases the risk and lowers the priority within an intra-company asset environment. Selecting the Right Alternative In recent years, the typical rotary steerable application has gone from unique to universal, but the underlying reasons for utilizing rotary steerable technologies are not always clear. Technically, many of the well paths and well designs can be drilled with conventional steerable drilling equipment, but a rotary steerable system is chosen because of the perceived benefits in drilling speed. If all the factors were considered, drilling speed or instantaneous rate of penetration (ROP) would be just one of several considerations, including reliability, trip frequency and trip time, hole cleaning considerations and short-trip frequency, hole quality and wellbore viability (stability). So, how are decisions being made to utilize one technology instead of another? One method is to search for the best average performance in an interval, among a wide range of wells. This fits with technical limit philosophies of many companies. Another, more practical method is to take into account all the variables that go into the various technologies and predict not just average ROP but an overall risked cost of the interval drilled with various methods. In directional wells, rotating and sliding drilling rates research needs to be weighed against failure rates and circulation times. Even hole quality and cuttings removal issues come into play when casing-running and primary cement success rates and short trips are considered. These models can be easily built, but collecting the data required to provide accurate and meaningful answers requires close cooperation between service company and operator. Figure 1 shows a simple set of input parameters and the economic impact of four potential drilling technologies in a specific interval. Based on the economic impact of various drilling technologies, a second-generation rotary steerable becomes the best economic option for rig rates greater than $100,000/day. Heavy Oil Reservoirs, Not Everyday Drilling Heavy oil reservoirs place some unique drilling challenges on operators, but with the right technology and personnel, the reservoirs can be drilled and produced successfully and economically. Several methods have been used to produce from heavy oil and bitumen reservoirs with varying degrees of success. Production methods fall into two categories: conventional heavy oil and enhanced recovery methods. Conventional heavy oil became more economical to produce with the advent of horizontal drilling, which became popular in Canada in 1989. Foamy oil recovery is the primary conventional heavy oil production technique.
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 | 0,001 | 0,003 |
| Méta-épidémiologie (sens strict) | 0,001 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,001 |
| Bibliométrie | 0,002 | 0,002 |
| Études des sciences et des technologies | 0,002 | 0,001 |
| Communication savante | 0,003 | 0,004 |
| Science ouverte | 0,001 | 0,005 |
| Intégrité de la recherche | 0,001 | 0,001 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,046 | 0,008 |
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 ».