Lipophilic rheology modifier and its application in oil‐based drilling fluids

2021 ◽  
pp. 51502
Author(s):  
Yan Zhou ◽  
Xiaolin Pu
Keyword(s):  
Drilling Fluids ◽  
Rheology Modifier

scholarly journals Experimental Investigation of the Rheological Behavior of an Oil-Based Drilling Fluid with Rheology Modifier and Oil Wetter Additives

Molecules ◽  
2021 ◽  
Vol 26 (16) ◽  
pp. 4877
Author(s):  
Mobeen Murtaza ◽  
Sulaiman A. Alarifi ◽  
Muhammad Shahzad Kamal ◽  
Sagheer A. Onaizi ◽  
Mohammed Al-Ajmi ◽  
...  
Keyword(s):  
High Temperature ◽  
Zeta Potential ◽  
Hot Rolling ◽  
Emulsion Stability ◽  
Drilling Fluid ◽  
Temperature Tolerance ◽  
Fluid Loss ◽  
Drilling Fluids ◽  
Before And After ◽  
Rheology Modifier

Drilling issues such as shale hydration, high-temperature tolerance, torque and drag are often resolved by applying an appropriate drilling fluid formulation. Oil-based drilling fluid (OBDF) formulations are usually composed of emulsifiers, lime, brine, viscosifier, fluid loss controller and weighting agent. These additives sometimes outperform in extended exposure to high pressure high temperature (HPHT) conditions encountered in deep wells, resulting in weighting material segregation, high fluid loss, poor rheology and poor emulsion stability. In this study, two additives, oil wetter and rheology modifier were incorporated into the OBDF and their performance was investigated by conducting rheology, fluid loss, zeta potential and emulsion stability tests before and after hot rolling at 16 h and 32 h. Extending the hot rolling period beyond what is commonly used in this type of experiment is necessary to ensure the fluid’s stability. It was found that HPHT hot rolling affected the properties of drilling fluids by decreasing the rheology parameters and emulsion stability with the increase in the hot rolling time to 32 h. Also, the fluid loss additive’s performance degraded as rolling temperature and time increased. Adding oil wetter and rheology modifier additives resulted in a slight loss of rheological profile after 32 h and maintained flat rheology profile. The emulsion stability was slightly decreased and stayed close to the recommended value (400 V). The fluid loss was controlled by optimizing the concentration of fluid loss additive and oil wetter. The presence of oil wetter improved the carrying capacity of drilling fluids and prevented the barite sag problem. The zeta potential test confirmed that the oil wetter converted the surface of barite from water to oil and improved its dispersion in the oil.

A novel star-shaped copolymer as a rheology modifier in water-based drilling fluids

2018 ◽  
Vol 168 ◽  
pp. 98-106 ◽  
Author(s):  
Zhihua Luo ◽  
Longxiang Wang ◽  
Jingjing Pei ◽  
Peizhi Yu ◽  
Boru Xia
Keyword(s):  
Drilling Fluids ◽  
Water Based ◽  
Rheology Modifier

Oxidation as a Rheology Modifier and a Potential Cause of Explosions in Oil and Synthetic-Based Drilling Fluids

2007 ◽  
Author(s):  
Khalil Shahbazi ◽  
Sudarshan A. Mehta ◽  
Robert Gordon Moore ◽  
Matthew G. Ursenbach ◽  
Kees Cornelius Van Fraassen
Keyword(s):  
Drilling Fluids ◽  
Rheology Modifier

Development of New Rheology Modifier for Invert Emulsion Drilling Fluids

2019 ◽  
Author(s):  
Vikrant Wagle ◽  
Abdullah AlYami ◽  
Khawlah Alanqari ◽  
Sara Alkhalaf
Keyword(s):  
Drilling Fluids ◽  
Invert Emulsion ◽  
Rheology Modifier
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