Petroleum Exploration and Development, 2021 By reviewing the mechanisms of drilling fluid lost circulation and its control in fractured formations, the applicability and working mechanisms of different kinds of lost circulation materials in plugging fractured formations have been summarized ...
Jinsheng SUN +8 more
doaj +4 more sources
Preparation and Performance Evaluation of a Supramolecular Gel Plugging Agent for Severe Lost Circulation Gas Reservoirs [PDF]
GelsThe plugging of fractured gas reservoirs with severe lost circulation during oil and gas drilling and production has long been challenged by technical issues such as low plugging strength and short effective duration.
Yingbiao Liu +7 more
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Bridging performance of new eco-friendly lost circulation materials [PDF]
Petroleum Exploration and Development, 2018 Lost circulation is one of the most important concerns of the drilling industry, causing excessive expenditure and increasing the non-productive drilling time.
Alireza NASIRI +4 more
doaj +5 more sources
Data–driven decision–making for lost circulation treatments: A machine learning approach [PDF]
Energy and AI, 2020 Lost circulation is an expensive and critical problem in the drilling operations. Millions of dollars are spent every year to mitigate or stop this problem. In this work, data from over 3000 wells were collected from multiple sources.
Husam H. Alkinani +2 more
doaj +4 more sources
Preparation and Performance Evaluation of a Lost-Circulation-Control Gel for Fractured Formations [PDF]
GelsTo address the dual challenges of severe lost circulation and wellbore instability in fractured formations, an acrylamide-based lost-circulation-control gel (DF-PG) was synthesized via aqueous-solution free radical polymerization using acrylamide (AM ...
Yundong Zheng +7 more
doaj +2 more sources
Development and Application of Oil-Based Thermo-Responsive Gel Lost Circulation Material SBR−g−PSA [PDF]
GelsLost circulation of oil-based drilling fluids (OBDFs) in deep, fractured formations remains a critical challenge, primarily due to the poor retention and low pressure-bearing capacity of conventional materials on oil-wet rock surfaces. To bridge this gap,
Zhimin Liu +6 more
doaj +2 more sources
Hemodynamic recovery after restoration of sinus rhythm after complete atrioventricular block during off-pump coronary artery bypass surgery: a case report [PDF]
Journal of Cardiothoracic SurgeryBackground Off-pump coronary artery bypass (OPCAB) surgery is frequently chosen for high-risk patients to mitigate cardiopulmonary bypass–related complications.
Sungmin Suh, Jiwoo Park, Won Ho Chang
doaj +2 more sources
Lost circulation pattern in the vug-fractured limestone formation
Energy Reports, 2023 Due to numerous leakage zones, such as vugs, fractures, and caves appearing in carbonate rocks, lost circulation, the main issue, restricts safe and effective drilling.
Huiwen Pang +5 more
doaj +1 more source
Tikrit Journal of Pure Science, 2023 Lost circulation, the loss of drilling fluid into holes or fractures throughout the geological formations being drilled, is the most expensive problem encountered in drilling operations for oil and gas wells.
Mayssa N. Shehab +2 more
doaj +1 more source
Genetic programming application in predicting fluid loss severity
Results in Engineering, 2023 Numerous wells worldwide encounter significant, costly, and time-consuming lost circulation issues during drilling or while deploying tubulars across naturally fractured or induced fractured formations.
Mohamed Amish, Eta Etta-Agbor
doaj +1 more source