Probing the state of water in oil-based drilling fluids

Di，Wenwen1; Zhao，Chunhua2; Geng，Tie3; Sun，Qiang3; Xu，Zhenghe4,5; Sun，Dejun1

2022-10-20

10.1016/j.colsurfa.2022.129770

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS   Impact Factor & Quartile

0927-7757

1873-4359

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.

Bound water Low-field nuclear magnetic resonance (LF NMR) Low-temperature differential scanning calorimetry (LT-DSC) Oil-based drilling fluids Water-in-oil (W/O) emulsions

EI ; SCI

English

Others

National Natural Science Foundation of China[21938003];

Chemistry

Chemistry, Physical

WOS:000888198900001

ELSEVIER

20223112457325

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

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

CHEMISTRY

2-s2.0-85134893460

Scopus

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).