Characteristics of Cracked Gas of Soluble Organic Matter Dispersed in Different Kinds of Rocks

Key words: 
• soluble organic matter /
• cracked gas /
• crude oil pyrolysis /
• thermal simulate experiment /
• clastic rock /
• carbonate rock

Abstract: By the thermal simulating experiments, the authors researched the gas generation model of soluble organic matter which is dispersed in carbonate and clastic rocks. It indicates that the pyrolytic gas productivity of soluble organic matter dispersed in clastic rocks is obviously different from that of which in carbonate rocks during the hightemperature cracking. In clastic rocks, the cracked gas productivity is increase with the abundance of soluble organic matter when the abundance below 0.3% and almost constant when up 0.3%. In carbonate rocks, the cracked gas productivity is almost constant all along. There is a remarkable different between the dry coefficients of the pyrolytic gas from these two kinds of rocks. This is result from the difference of the rocks' selective adsorption to the heavy hydrocarbon.