Openhole Horizontal Completions in Niger Delta
Bibliographic record
Abstract
Openhole Horizontal Completions in Niger Delta James Ohioma I. Arukhe; James Ohioma I. Arukhe Petro-Canada Search for other works by this author on: This Site Google Scholar Reg James Senyk; Reg James Senyk Petro-Canada Search for other works by this author on: This Site Google Scholar Nuhu Adaji; Nuhu Adaji Shell Search for other works by this author on: This Site Google Scholar Olatunji Abiodun Adu; Olatunji Abiodun Adu Shell Petroleum Dev. Co. Nigeria Search for other works by this author on: This Site Google Scholar Linus Ayajuru Nwoke; Linus Ayajuru Nwoke Shell Petroleum Dev. Co. Nigeria Search for other works by this author on: This Site Google Scholar Tola Adegborioye; Tola Adegborioye Shell Search for other works by this author on: This Site Google Scholar Victor Ogoke; Victor Ogoke Shell Search for other works by this author on: This Site Google Scholar Peter Oyebanji; Peter Oyebanji Canadian Sub-Surface Search for other works by this author on: This Site Google Scholar Jose Arellano Jose Arellano Petroleum Experts Inc. Search for other works by this author on: This Site Google Scholar Paper presented at the SPE Western Regional/AAPG Pacific Section/GSA Cordilleran Section Joint Meeting, Anchorage, Alaska, USA, May 2006. Paper Number: SPE-100495-MS https://doi.org/10.2118/100495-MS Published: May 08 2006 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Get Permissions Search Site Citation Arukhe, James Ohioma I., Senyk, Reg James, Adaji, Nuhu, Adu, Olatunji Abiodun, Nwoke, Linus Ayajuru, Adegborioye, Tola, Ogoke, Victor, Oyebanji, Peter, and Jose Arellano. "Openhole Horizontal Completions in Niger Delta." Paper presented at the SPE Western Regional/AAPG Pacific Section/GSA Cordilleran Section Joint Meeting, Anchorage, Alaska, USA, May 2006. doi: https://doi.org/10.2118/100495-MS Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAll ProceedingsSociety of Petroleum Engineers (SPE)SPE Western Regional Meeting Search Advanced Search AbstractThe Niger Delta is a highly activity region in open hole applications. A wide variety of completion types have been deployed in open hole in the region. A major challenge in these completions is to deliver quality wells through the choice of an optimal sand control system. A locally developed database tracks the performance of the sand face completions, their reliability, observed failures and their causes. The oil reservoirs have used barefoot, standalone screens, slotted liners, gravel packs and expandables while pre-drilled liners have been used for borehole support. The expandable technology is relatively the most recent technique but of the three hundred and forty run so far globally as at September 2005, more than 3/4 has been deployed in Niger Delta alone.For the non-associated gas reservoirs, most of which have been conventional wells, based on fair understanding of the risks and uncertainties associated with two main sand control options namely, gravel packing and the expandable sand screens, work has been done to show adequate demonstration of the process of selection. This structured approach considers design options based on several factors such as possible problem with under-reaming relatively deep sections, previous performance in the existing high rate gas wells, productivity and better life cycle design perspectives. Within the Darcy permeability regime of the sandstone gas reservoirs, productivity with respect to horizontal versus conventional completion was compared and a matrix capturing the risks impact of a horizontal completion is attempted.The work concludes by suggesting future concerns in open hole horizontal sand control to include cost of installation failure, accurate modelling upfront and remedial zone isolation after gas/water breakthough.IntroductionConventional wells have been applied to drain reservoirs in Niger Delta extensively. In recent years, horizontal wells have started to gain acceptance as a proven reservoir management and well completion method. The major purpose of a horizontal well is to enhance reservoir contact and thereby enhance well productivity. Within the Niger Delta environment, horizontal well completions have been widely used with success. Productivity improvement factors (compared to conventional wells) of two or higher is not uncommon. Even in recovery by waterflooding, driving a water front between two horizontal wells in a thin reservoir may enhance oil recovery when compared to a waterflood between vertical wells.[6] Field development plans for most Niger Delta reservoirs that target thin oil rims overlain by gas and underlain by an active aquifer, therefore now also rely almost entirely on horizontal wells. Vertical wells are not suited in this situation due to the rapid coning of water or gas at reasonable production rates.[2] Horizontal wells, correctly placed in the oil column lead to high flow rates with very little drawdown. The small drawdown delays premature breakdown of water or gas at flow rates much higher than those possible from conventional vertical wells. Multilateral wells drilled in the region have been mainly horizontal in the drainhole sections. The purpose of this paper is to review sand control systems in horizontal open hole applications in the region. The Niger Delta is truly a high activity region in the area and experience gained should provide a helpful baseline in terms of expenditure and well productivity. Keywords: sand control, Upstream Oil & Gas, Screen Selection, conventional well, Directional Drilling, ess, liner, drilling operation, Niger Delta, gas well Subjects: Drilling Operations, Directional drilling, Screen selection, Sand Control, Completion Operations This content is only available via PDF. 2006. Society of Petroleum Engineers You can access this article if you purchase or spend a download.
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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 | 0.000 | 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".