Exploratory Well Hits Target Successfully on the 8th Attempts in the Binak Oilfield, North of Persian Gulf
Bibliographic record
Abstract
Abstract In the Binak oilfield, located in the north of the "Persian Gulf", seven exploratory wells were attempted to drill to the target, which is the Khami reservoir at a depth of 5600 m. Due to special conditions and problems, drilling through the formations in this oilfield was unsuccessful. The main drilling challenges include selecting correct casing depth, borehole instability due to shale sloughing and severe fluid loss and flow during drilling. These problems resulted in the unsuccessful drilling of seven exploratory wells. Therefore, the following factors were considered in designing the new exploratory well number eight.Proper selection of drilling fluids for the different hole sections by performing fluid absorption experiments on shale samples.New design of the casing and liner string.Setting casing at the right depths.Correct selection of mud weight in order to minimize severe loss and flow.Precise determination and cure of loss zones.Minimize shale sloughing by increasing mud weight This paper shares and discusses the experience of NIOC (National Iranian Oil Company) in drilling the 8th exploratory well. It covers the successful well design as well as the methods and procedures adapted to drill this 8th well. Introduction The Binak oilfield is located in the north of the Persian Gulf and was discovered in 1957. This oilfield is surrounded by other oilfields such as Bibi-Hakimeh, Rag-E-Sefid, Hendijan, Bahregan SAR, and Golkhari which is shown in Figure 1. The Binak oilfield formations are the Agha Jari, Mishan, Asmari, Pabdeh, Gurpi, Bnagestan group formations, the Kazhdumi and the Khami group formations. Table 1 shows a brief description of the formations in Binak oilfield. The present path in the drilling industry is to drill more complex wells in as cost effective way as possible. Therfore, well planning and drilling operation has to continuously improve. All technical information related to drilling wells should be considered in the well design. Major considerations must be taken for both safety and economic reasons. Two of the main considerations are that the well is drilled with an optimum mud weight and proper casing setting depth. Factors such as shale layers and abnormal/subnormal pressure formations can also greatly affect the well design.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 teacher head, 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".