Use of a Fullbore-Access Level 3 Multilateral Junction in the Orinoco Heavy Oil Belt, Venezuela
Bibliographic record
Abstract
Abstract Petrozuata C.A. has initiated an aggressive campaign of constructing multilateral wells in their shallow extra-heavy-oil field in the Faja of the Orinoco River, Venezuela. The RapidTieBack* multilateral drilling and completion system has been used on many of the multilaterals.1 The system uses a casing section, with a factory-milled window, that is run in the 9 5/8-in. production casing string. Lateral 8 1/2-in. boreholes are drilled from the 9 5/8-in. casing and fitted with 7-in. slotted liners. The system employs a liner tieback on the top of the 7-in. liner. The liner tieback is mechanically pressed into the window. The tieback creates a fullbore TAML Level 3 (lateral cased, uncemented) junction. The fullbore access within the 9 5/8-in. production casing allows placement of a progressive cavity pump (PCP) below the junction(s) and thus closer to the lowest lateral. The system utilizes a production whipstock to allow selective reentry into any lateral. The benefits of utilizing this system and a general description of the running procedures are presented in this paper. Some of the problems are described as well as the changes to the procedures that helped prevent reoccurrence of the problems.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.002 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".