Abstract: The present invention relates to a thiourethane based aerogels obtained by reacting an isocyanate compound having a functionality equal to or greater than 2 and a thiol compound having a functionality equal to or greater than 2 in the presence of a solvent. Aerogels according to the present invention are generally hydrophobic, high performance materials. Aerogels according to the present invention are light weight they have low thermal conductivity, low shrinkage and high mechanical properties.

Abstract: The present invention relates to an organic aerogel obtained by reacting a thiol compound having a functionality from 2 to 6 and an epoxy compound having a functionality from 2 to 6 in a presence of a solvent. The organic aerogels according to the present invention are hydrophobic, high performance materials (lightweight, with low thermal conductivity, low shrinkage, and high mechanical properties).

Abstract: The present invention relates to an organic aerogel obtained by reacting an amine compound having at least two amine functionalities and a cyclic ether compound in the presence of a solvent. An organic aerogel according to the present invention is produced with a versatile process and provides good thermal and acoustic insulation and good mechanical properties.

Abstract: A method of monitoring the drilling of a wellbore having a drilling fluid that circulates in the wellbore during drilling, comprises: Extracting a plurality of gaseous compounds from a sample of drilling fluid exiting the wellbore, Measuring a quantity y(i) of at least a group of compounds, each group comprises comprising at least one extracted gaseous compound, Determining, from the measured quantity y(i) and an extraction coefficient ?(i) associated to each group, the content x(i) of each group of gaseous compounds present in the sample of drilling fluid, Deriving a drilling indicator from the content x(i) of at least one group of gaseous compounds.

Abstract: An aerogel according to the present invention is obtained by reacting silanol moieties on a surface of a clay; an isocyanate compound A; an isocyanate compound B; a cyclic ether compound; a solvent A; and a solvent B. Aerogels according to the present invention have good mechanical properties and good thermal insulation properties.

Abstract: The present invention relates to a hybrid aerogel obtained by reacting an aromatic or aliphatic isocyanate compound and silanol moieties on a surface of a clay in a presence of a solvent. Hybrid aerogels according to the present invention provide high thermal insulation material, while good mechanical properties and performance is maintained.

Abstract: The present disclosure relates to a downhole fluid analysis method that includes withdrawing formation fluid into a downhole tool at a plurality of stations within a wellbore, analyzing the formation fluid within a fluid analyzer of a downhole tool to determine properties of the formation fluid for the plurality of stations, and developing, based on the determined properties of the formation fluid, a relationship for predicting viscosity from a measured optical density.

Abstract: A method for using an optical spectrum of mud filtrate for analysis of fluid drawn from a formation is provided. The method includes performing downhole fluid analysis of formation fluid drawn at a wellbore measurement station and determining an optical spectrum of mud filtrate in the formation fluid drawn at the wellbore measurement station. The method also includes performing downhole fluid analysis of formation fluid drawn at an additional wellbore measurement station, and performing the downhole fluid analysis of formation fluid drawn at the additional wellbore measurement station includes using the determined optical spectrum of the mud filtrate in the formation fluid previously drawn at the wellbore measurement station. Additional methods, systems, and devices are also disclosed.

Abstract: A nuclear magnetic resonance (NMR) measurement, at two or more depths of investigation, of a subsurface formation containing formation water and a mud filtrate from a water-base mud is obtained, and the mud filtrate is distinguished from the formation water. A NMR logging tool is disposed in a wellbore penetrating the formation containing the mud filtrate and the formation water and NMR measurements at different radial depths of investigation into the formation are made. The mud filtrate is distinguished from the formation water by determining the relative salinities of the mud filtrate and the formation water. The relative salinities are determined by comparing distribution relaxation times across different depths of investigation or by comparing logarithmic mean values across different depths of investigation.

Abstract: The disclosure relates to a method of monitoring the drilling of a wellbore, wherein a drilling fluid circulates in the wellbore during drilling, the method comprising: Extracting (106) a plurality of gaseous compound from a sample of drilling fluid exiting the wellbore, Measuring (108) a quantity y(i) of at least a group of compounds, wherein each group comprises at least one extracted gaseous compound, Determining (110), from the measured quantity y(i) and an extraction coefficient ?(i) associated to each group, the content x(i) of each group of gaseous compounds present in the sample of drilling fluid, Deriving (116) a drilling indicator from the content x(i) of at least one group of gaseous compounds,

Abstract: The present disclosure relates to a downhole fluid analysis method that includes withdrawing formation fluid into a downhole tool at a plurality of stations within a wellbore, analyzing the formation fluid within a fluid analyzer of a downhole tool to determine properties of the formation fluid for the plurality of stations, and developing, based on the determined properties of the formation fluid, a relationship for predicting viscosity from a measured optical density.

Abstract: A method for using an optical spectrum of mud filtrate for analysis of fluid drawn from a formation is provided. The method includes performing downhole fluid analysis of formation fluid drawn at a wellbore measurement station and determining an optical spectrum of mud filtrate in the formation fluid drawn at the wellbore measurement station. The method also includes performing downhole fluid analysis of formation fluid drawn at an additional wellbore measurement station, and performing the downhole fluid analysis of formation fluid drawn at the additional wellbore measurement station includes using the determined optical spectrum of the mud filtrate in the formation fluid previously drawn at the wellbore measurement station. Additional methods, systems, and devices are also disclosed.

Abstract: A nuclear magnetic resonance (NMR) measurement, at two or more depths of investigation, of a subsurface formation containing formation water and a mud filtrate from a water-base mud is obtained, and the mud filtrate is distinguished from the formation water. A NMR logging tool is disposed in a wellbore penetrating the formation containing the mud filtrate and the formation water and NMR measurements at different radial depths of investigation into the formation are made. The mud filtrate is distinguished from the formation water by determining the relative salinities of the mud filtrate and the formation water. The relative salinities are determined by comparing distribution relaxation times across different depths of investigation or by comparing logarithmic mean values across different depths of investigation.