原油裂解成气反应机理、介质影响因素与判识评价

原油裂解成气是近年来天然气勘探领域重大的理论进展之一,其直接关系到勘探工作的决策和部署.对原油裂解气的裂解反应机理、介质影响因素与判识评价进行了较为详细的总结和评述,认为常用的原油热裂解一级动力学模拟模型可能不适合于地质温度条件下特别稳定的重烃气体;地质温度条件下原油加氢裂解的重要性可能被忽视;疏导体系及储层条件下的重烃反应损耗也是形成实际天然气藏的重要途径之一;目前的判识评价指标尚不能从本质上反映原油裂解气与干酪根裂解气的差异.

Reaction mechanism,medium influencing factors and identification and evaluation of oil-cracking gas

Oil-cracking gas is one of the greatest academic progresses in natural gas prospecting,and it directly related to the decision-making and disposal of exploitation and prospecting.The reaction mechanisms,medium influencing factors and identification and evaluation of oil-cracking gas were summarized and commented.It is suggested that the general thermal pyrolysis first-order kinetic models of crude oil could not suit the heavy hydrocarbon gas in geological temperature,the hydrothermal pyrolysis of crude oil was overlooked,and the reaction wastage of heavy-hydrocarbon gas in the translocation system and reservoir were one of the important paths during the gas pool formation,the present identification and evaluation indexes of oil-cracking gas could not reveal the actual difference between oil-cracking and kerogen-cracking gas.