【摘 要】
：
In this study,laponite was tested as a mud-making material for drilling fluids.Laponite is a synthetic smectite clay with a structure and composition closely resembling the natural clay mineral hectorite.Commercially available laponite was characterized b
【机 构】
：
Beijing Institute of Exploration Engineering,Beijing 100083, China
论文部分内容阅读
In this study,laponite was tested as a mud-making material for drilling fluids.Laponite is a synthetic smectite clay with a structure and composition closely resembling the natural clay mineral hectorite.Commercially available laponite was characterized by X-ray diffractometry,scanning electron microscopy and infrared spectrometry.Its dispersibility,salt resistance and high-temperature resistance were evaluated.The results showed that laponite possessed superior cation exchange capacity (140.4 mmol/100 g) with interlayer cations of Na+ and Li+.Laponite could easily be dispersed in water to yield increased viscosity with no influence from hydration time or temperature.On the other hand,laponite dispersions displayed an excellent heat resistance,with invariant apparent viscosity at high temperatures.For instance,the apparent viscosity of the 2 wt％ laponite dispersion underwent changes between 22 and 24 mPa s after hot rolling at 180-240 ℃ for 16 h.Compared to existing mud-making materials,laponite exhibited better mud-making properties.Furthermore,laponite revealed good compatibility with other additives,and the water-based drilling fluids prepared with laponite as mud-making material showed an excellent stability at elevated temperatures and superior performance-cost ratios.Overall,these findings indicated that laponite had an excellent dispersibility at high temperatures and hence would have promising applications as high-temperature mud-making material for preparing water-based drilling fluids designed for ultra-high-temperature environments.
其他文献
We developed an in situ synthesis strategy for preparing well-dispersed CuO nanoparticles as aquathermolysis catalyst for viscosity reduction in Shengli heavy oil (China).A Cu(OH)2-contained microemulsion was employed as a carrier to disperse the precurso
The cost-effective treatment of activated sludge that is generated by refining petroleum is a challenging industrial problem.In this study,semi-continuous stirred tank reactors (CSTRs) containing petroleum refinery excess activated sludge (PREAS) were use
The effects of CO2 and salt type on the interfacial tension (IFT) between crude oil and carbonated brine (CB) have not been fully understood.This study focuses on measuring the dynamic IFT between acidic crude oil with a total acid number of 1.5 mg KOH/g
Inter-salt shale oil reservoirs located between two salt layers are always accompanied by high temperature and high salinity.However,the present commonly used water-soluble polymers in fracturing fluids suffer from poor tolerance to high temperature and h
Oil and gas pipeline networks are a key link in the coordinated development of oil and gas both upstream and downstream.To improve the reliability and safety of the oil and gas pipeline network,inspections are implemented to minimize the risk of leakage,s
Inorganic scale deposits are a major water-related problem encountered in producing oil and gas wells.The harshness of scale deposits is dependent on the field operating conditions.Scale deposits can vary from mild scaling tendencies to extreme.In general
Streamline-adjustment-assisted heterogeneous combination flooding is a new technology for enhanced oil recovery for postpolymer-flooded reservoirs.In this work,we first carried out a series of 2D visualization experiments for different chemical flooding s
The applications of nanotechnology in oilfields have attracted the attention of researchers to nanofluid injection as a novel approach for enhanced oil recovery.To better understand the prevailing mechanisms in such new displacement scenarios,micromodel e
This paper presents a three-dimensional,three-phase compositional model considering CO2 phase equilibrium between water and oil.In this model,CO2 is mutually soluble in aqueous and hydrocarbon phases,while other components,except water,exist in hydrocarbo
A series of Pd/MIL-53(Al) heterogeneous bifunctional catalysts with different Pd contents were prepared by an impregnation method.The prepared metal-organic frameworks MIL-53(Al) and catalysts were characterized by XRD,SEM,HRTEM,FT-IR and N2 adsorption/de