scholarly journals Innovative approach for geospatial drought severity classification: a case study of Paraíba state, Brazil

2018 ◽  
Vol 33 (2) ◽  
pp. 545-562 ◽  
Author(s):  
Celso Augusto Guimarães Santos ◽  
Reginaldo Moura Brasil Neto ◽  
Richarde Marques da Silva ◽  
Daris Correia dos Santos
Keyword(s):  
Innovative Approach ◽  
Drought Severity ◽  
Severity Classification

Weak Speech Supervision: A case study of Dysarthria Severity Classification

2021 ◽  
Author(s):  
Mirali Purohit ◽  
Mihir Parmar ◽  
Maitreya Patel ◽  
Harshit Malaviya ◽  
Hemant A. Patii
Keyword(s):  
Severity Classification

An Innovative Approach to P&A Barrier Verification and Cement Plug Placement Utilising In-Situ Completion Strings: A Case Study

2021 ◽  
Author(s):  
Andrew Imrie ◽  
Ashikin Kamaludin ◽  
Andrew Hood ◽  
Alistair Agnew
Keyword(s):  
Evaluation Criteria ◽  
Innovative Approach ◽  
Bond Quality ◽  
Cement Slurry ◽  
Additional Time ◽  
Time Saving ◽  
Deviation Analysis ◽  
Degree Deviation ◽  
Cement Plug

Abstract Traditional evaluation of behind-casing cement bond quality prior to cement plug placement involves removal, storage, transportation, and disposal of the tubing completion string. This paper presents an innovative approach to verifying cement bond and subsequent cement plug placement. This method involves cutting and retrieving part of the completion string and deploying acoustic logging tools into the casing, followed by using the tubing as a cement stinger. The procedure described in this paper first involves plugging and cutting the tubing, followed by partial retrieval of the completion to expose the abandonment horizon, which may be an impermeable shale or salt layer. A radial cement bond log tool is conveyed on wireline out of the tubing cut in order to evaluate the cement bond behind the exposed casing section. The existing cement sheath is assessed in accordance to a cement evaluation criteria to determine suitability as a barrier. A balanced cement plug is pumped utilising the existing completion string rather than a dedicated stinger. The permanent barrier is then verified appropriately based on satisfying key metrics in the pumping operation before hanging off the completion tubing in-hole and progressing with the rest of the abandonment programme. In the case study presented here, the tool string design considered the need to pass completion restrictions, convey through production tubing, and remain centralised with up to 50-degree deviation. Analysis of cement bond log data indicated that bond quality was good and suitable to place an internal cement plug across the abandonment horizon. This satisfied a minimum of 200-ft coverage across the zone of interest. The existing deep-set mechanical plug placed in the tubing prior to tubing cut was utilised as a base for the cement barrier. A 2,000-ft balanced cement plug was successfully set across the zone of interest. The completion tubing was used as a conduit for cement slurry placement, eliminating the usage of a dedicated work string. At the end of displacement, the tubing string was pulled out of hole safely to approximately 500-ft above the top of the cement with the help of controlled-gel progression properties incorporated in the slurry design. Due to existing completion accessories, setting a through-tubing cement plug and tubing rotation is not an option. Expandable cement was pumped to mitigate natural shrinkage and enhance post-set cement expansion to ensure a competent barrier. The cement job objectives were achieved by meeting the cementation execution criteria with no requirement to wait on cement. This provides additional time saving to the well abandonment. The discussed approach has successfully realised a significant rig-time saving of approximately two days on each well. Going forward, the methodology has effectively been applied to multiple wells across the Southern North Sea (SNS).

scholarly journals Climatological Drought Forecasting Using Bias Corrected CMIP6 Climate Data: A Case Study for India

Forecasting ◽  
2020 ◽  
Vol 2 (2) ◽  
pp. 59-84 ◽  
Author(s):  
Alen Shrestha ◽  
Md Mafuzur Rahaman ◽  
Ajay Kalra ◽  
Rohit Jogineedi ◽  
Pankaj Maheshwari
Keyword(s):  
Coupled Model ◽  
Severity Index ◽  
Extreme Drought ◽  
Drought Severity ◽  
Climate Data ◽  
Drought Forecasting ◽  
Drought Duration ◽  
Intercomparison Project ◽  
Near Future

This study forecasts and assesses drought situations in various regions of India (the Araveli region, the Bundelkhand region, and the Kansabati river basin) based on seven simulated climates in the near future (2015–2044). The self-calibrating Palmer Drought Severity Index (scPDSI) was used based on its fairness in identifying drought conditions that account for the temperature as well. Gridded temperature and rainfall data of spatial resolution of 1 km were used to bias correct the multi-model ensemble mean of the Global Climatic Models from the Coupled Model Intercomparison Project Phase 6 (CMIP6) project. Equidistant quantile-based mapping was adopted to remove the bias in the rainfall and temperature data, which were corrected on a monthly scale. The outcome of the forecast suggests multiple severe-to-extreme drought events of appreciable durations, mostly after the 2030s, under most climate scenarios in all the three study areas. The severe-to-extreme drought duration was found to last at least 20 to 30 months in the near future in all three study areas. A high-resolution drought index was developed and proven to be a key to assessing the drought situation.

An Innovative Approach to Formation Evaluation with a Sourceless LWD Technology for the First Time in Joint Operations, A Case Study From Partitioned Zone Between Kuwait and Saudi Arabia

2015 ◽  
Author(s):  
Jamal Al-Rubaiyea ◽  
Ahmad Al-Bader ◽  
Meshari Al-Houli ◽  
Abdul-aziz Al-Najim ◽  
Majed Al-Duwaish ◽  
...  
Keyword(s):  
Saudi Arabia ◽  
Innovative Approach ◽  
Formation Evaluation ◽  
Joint Operations ◽  
First Time

scholarly journals Innovative approach of drills acquisition using electrical current. A case study

2017 ◽  
Vol 112 ◽  
pp. 01023 ◽  
Author(s):  
Raluca Daicu ◽  
Valentin Diţu ◽  
Gheorghe Oancea
Keyword(s):  
Electrical Current ◽  
Innovative Approach
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