Comparison of Simulation Results from the Closed and Open Experimental Systems and Its Significance
LU Shuang-fangWANG Min WANG Yao-wenXU Li-heng XUE Hai-taoLI Ji-jun (Daqing Petroleum Institute, Daqing, Heilongjiang163318)
Fourorganicsamples inSongliao basinare simultaneously testedin the closed-system of autoclave isothermal hydrous pyrolysis experiment and open-system of Rock-Eval constant heating rate pyrolysis experiment, separately. Based on the latter experimental data, the chemical kinetic models are calibrated and then the generation rates of oil and gas under the same conditions as the former autoclave experiment are calculated from the models calibrated. The results show that it is more accurate to measure the liquid oil product by the on-line measurement of Rock-Eval than the autoclave experiment that needs extraction and a constant weight because of no light hydrocarbons (C_ 6 —C_ 13 ) missing in the constant heating rate experiment, and clearly, it provides an effective way to measure the light hydrocarbons (C_ 6 —C_ 13 ) that are difficult to measure in the thermal simulation experiment but significant to evaluate the amount of hydrocarbon generation. Simultaneously, this method can avoid gas leakage influencing gas generation rate accuracy in the autoclave experiment. It is possibly indicated that it is not only feasible to use the chemical kineticmodel calibrated by the experiment data to calculatethe hydrocarbon generation rate, but also more accurate.