公开(公告)号：US20180164273A1

公开(公告)日：2018-06-14

申请号：US15579271

申请日：2015-06-08

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Vincent Joseph SIEBEN ,  Farshid MOSTOWFI ,  Nejib HAMED ,  Alexander STICKEL ,  Collins OBIOSA-MAIFE

IPC: G01N33/28 ,  G01N21/05 ,  G01N21/31 ,  G01N1/38 ,  E21B49/08

CPC classification number: G01N33/2823 ,  E21B49/08 ,  G01N1/38 ,  G01N21/05 ,  G01N21/31 ,  G01N2001/4061 ,  G01N2030/027

Abstract: A method of determining saturate, aromatic, resin, and asphaltene (SARA) fractions of a hydrocarbon fluid sample, including: i) microfluidic mixing that forms a mixture including the hydrocarbon fluid sample and a solvent fluid that dissolves asphaltenes; ii) performing optical spectroscopy on the hydrocarbon fluid sample-solvent fluid mixture resulting from i); iii) microfluidic mixing that forms a mixture including the hydrocarbon fluid sample and a titrant fluid that precipitates asphaltenes; iv) microfluidically precipitating asphaltenes from the hydrocarbon fluid sample titrant fluid mixture resulting from iii); v) performing a microfluidic filtering operation that removes precipitated asphaltenes from the mixture resulting from iv) while outputting permeate; vi) performing optical spectroscopy on the permeate resulting from v); vii) determining an asphaltene fraction percentage of the hydrocarbon fluid sample based on the optical spectroscopy performed in ii) and vi); viii) sequentially separating saturate-, aromatic-, and resin-containing portions from the permeate from v); ix) for each separating of viii), measuring an optical property of the respective saturate-, aromatic-, and resin-containing portions over time; and x) determining fraction percentages of saturates, aromatics, and resins in the hydrocarbon fluid sample based on the measured optical properties of ix) and respective mass-to-optical correlation data.