ペトロリオミクス技術を用いた実油田の全分子分析結果に基づくアスファルテン安定性評価について

抄録

Petroleomics is a new scientific paradigm for petroleum engineering to treat petroleum fluid in molecular level. To predict asphaltene precipitation problem, petroleomics technology were applied to Minami-Kuwayama oil field which encountered asphaltene trouble in Japan. The analyzed sample was AR（atmospheric residue）obtained by distillation of Minami-Kuwayama stock tank oil. As a result of measurement by FTICR-MS（Fourier Transfom Ion Cyclotron Resonance Mass Spectrometer）, it was found that the AR of Minami-Kuwayama consists of 150000 chemical species（including 50000 asphaltenes）.

For a better understanding, 45 representative molecules were selected from all chemical species based on their weight fractions. Then their DBE and Hansen solubility parameters were compared. On the DBE plot, the heavier asphaltenes were located farther from the main component of AR, but on the Hansen plot, the intermediate component was located farther from the main component of AR than the heavier component. It was suggested that intermediate asphaltene molecules might be one of the key factors of the asphaltene precipitation.