The New Method for Quantitative Evaluation Secondary Hydrocarbon Generation Potential of Marine Source Rocks

Key words: 
• secondary hydrocarbon generation /
• simulation experiment /
• marine source rock /
• quantitative evolution of hydrocarbon potential

Abstract: Secondary hydrocarbon generation of source rocks included the residual kerogen pyrolysis evolution and thermal cracking of residual oil, two interrelated and completely different physical and chemical reactions. Based on simulation experiments of the natural maturity marine shale samples, used a phased continuouly progressive simulation experiment, and evaluated the residual hydrocarbon potential of kerogen and soluble organic matter into oil and gas residues potential, setd a quantitative evaluation method of secondary hydrocarbon generation of different maturity marine shale. And for the first time clearly put forward the kerogen oil source index KIo, kerogen gas index  KIg, kerogen hydrocarbon index KIh and other hydrocarbon index of hydrocarbon source rock evaluation of the parameters of the potential, made up for the ROCKEVAL pyrolysis evaluation method of source rocks can not be evaluated separately in different evolutionary stages of hydrocarbon generation of the "oil" or "hydrocarbon gas" potential deficiencies.