Status and Prospect of Drilling Fluid Loss and Lost Circulation Control Technology in Fractured Formation [PDF]
Gels, 2022 Lost circulation in fractured formation is the first major technical problem that restricts improvements in the quality and efficiency of oil and gas drilling engineering.
Jingbin Yang +5 more
doaj +4 more sources
High-Strength Controllable Resin Plugging Agent and Its Performance Evaluation for Fractured Formation [PDF]
GelsLost circulation is a common and complicated situation in drilling engineering. Serious lost circulation may lead to pressure drop in the well, affect normal drilling operations, and even cause wellbore instability, formation fluid flooding into the ...
Xiongwei Liu +4 more
doaj +2 more sources
Preparation and Performance Evaluation of Gelled Composite Plugging Agent Suitable for Fractured Formation [PDF]
GelsLost circulation in fractured formations is a common yet challenging technical problem in drilling engineering. Conventional plugging methods often form sealing layers with poor stability and low pressure-bearing capacity.
Kecheng Liu +5 more
doaj +2 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
Dynamic response mechanism of borehole breathing in fractured formations
Energy Reports, 2022 The borehole breathing observed when drilling into natural fractured formations is often erroneously identified as leakage or kick. The main reason for this phenomenon is that the fractures around the well have opened and closed after being affected by ...
Hongwei Yang +6 more
doaj +3 more sources
Productivity dynamic analysis of fractured horizontal well in ultra-low permeability reservoir [PDF]
E3S Web of Conferences, 2023 Daqing Oilfield is rich in low permeability reservoirs. In order to fully understand the development dynamics of ultra-low permeability reservoirs, this paper takes Daqing Oilfield as an example and studies the productivity dynamics of fractured ...
Xing YuLong
doaj +1 more source
Formation mechanisms of fracture plugging zone and optimization of plugging particles
Petroleum Exploration and Development, 2022 As formation mechanisms of plugging zone and criteria for fracture plugging remain unclear, plugging experiments and methods testing granular material mechanical properties are used to study the formation process of the plugging zone in fractured ...
Shaofei LEI +7 more
doaj +1 more source
Dynamics of wormhole formation in fractured limestones [PDF]
Hydrology and Earth System Sciences, 2019 Reactive transport in porous or fractured media often results in an evolution of highly conductive flow channels, often referred to as “wormholes”. The most spectacular wormholes are caves in fractured limestone terrains.
W. Dreybrodt +2 more
doaj +1 more source
Does mudcake change the results of modeling gamma-gamma well-logging?
Nuclear Engineering and Technology, 2022 Among the different techniques available, nuclear methods, including gamma-gamma logging tools, are of special importance. Though the real environment which surrounds the drilled borehole is a complex fractured medium which the fluid can flow through the
Fatemeh S. Rasouli
doaj +1 more source
A model experimental study of the formation mechanism of internal erosion caves in fractured loess
Shuiwen dizhi gongcheng dizhi, 2023 The formation mechanism of caves in fissured loess at the edge of the loess platform plateau is complex and is closely related to the occurrence of geological hazards such as landslides, which pose a serious threat to the production and life of people in
Buping ZHANG +4 more
doaj +1 more source