Probing the state of water in oil-based drilling fluids
Oil-based drilling fluids, also referred to as “invert emulsion drilling fluids”, have been widely accepted as mixtures of water-in-oil (W/O) emulsions and inorganic particles, in which the water droplet–particle interaction has not been considered. Probing the state of water plays an important role in optimizing the performance of oil-based drilling fluids. In this work, hydrophilic BaSO and hydrophobic polytetrafluoroethylene (PTFE) particles were added to W/O emulsions. The microstructures of the water droplets and particles in the oil phase were studied using an optical microscope. The state of water was characterized by T nuclear magnetic resonance (NMR) and low-temperature differential scanning calorimetry (LT-DSC). Finally, the state of water in actual invert emulsion drilling fluids was verified by two-dimensional T-T NMR. The results showed that the water droplets bound to the hydrophilic BaSO particles formed hydrated particle aggregates in the oil phase, while the water droplets and hydrophobic PTFE particles were suspended individually in the oil phase. Thus, the so-called invert emulsion drilling fluids are in fact colloidal suspensions of hydrated particle aggregates in continuous oil phase, rather than W/O emulsions. The findings of this work provide new insights into the formulation and utilization of oil-based drilling fluids.
National Natural Science Foundation of China;
|WOS Research Area|
|WOS Accession No|
|EI Accession Number|
Aggregates ; Barium sulfate ; Calorimeters ; Differential scanning calorimetry ; Drops ; Emulsification ; Emulsions ; Hydration ; Hydrophilicity ; Hydrophobicity ; Infill drilling ; Nuclear magnetic resonance ; Ostwald ripening ; Sulfur compounds ; Suspensions (fluids) ; Temperature
|ESI Classification Code|
Highway Engineering:406 ; Concrete Reinforcements:412.2 ; Oil Field Production Operations:511.1 ; Thermodynamics:641.1 ; Chemical Operations:802.3 ; Chemical Products Generally:804 ; Inorganic Compounds:804.2 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Temperature Measuring Instruments:944.5 ; Temperature Measurements:944.6
|ESI Research Field|
Cited Times [WOS]:0
|Document Type||Journal Article|
|Department||Department of Materials Science and Engineering|
1.Key Laboratory of Colloid and Interface Chemistry,Ministry of Education,Shandong University,Jinan,Shandong,250100,China
2.State Key Lab of Offshore Oil Exploitation,Beijing,100028,China
3.Oilfield Chemistry Research Institute,Division of Oilfield Chemistry,China Oilfield Services Limited,Langfang,Hebei,065000,China
4.Department of Chemical and Materials Engineering,University of Alberta,Edmonton,T6G 1H9,Canada
5.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
Di，Wenwen,Zhao，Chunhua,Geng，Tie,et al. Probing the state of water in oil-based drilling fluids[J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,2022,651.
Di，Wenwen,Zhao，Chunhua,Geng，Tie,Sun，Qiang,Xu，Zhenghe,&Sun，Dejun.(2022).Probing the state of water in oil-based drilling fluids.COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,651.
Di，Wenwen,et al."Probing the state of water in oil-based drilling fluids".COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 651(2022).
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