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油气藏分形特征形成的动力学机制及适用条件
王任一1,李江涛2
(1.浙江海洋大学石化与能源工程学院,浙江舟山 316022;2.中国石油青海油田公司,甘肃敦煌 736202)
摘要:
利用成藏动力学与非平衡态热力学相结合方法,对油气藏分形特征形成的动力学机制及适用条件进行研究。结果表明:在弱油气运移有效驱动力作用下,油气藏分布具有分形特征;而强油气运移有效驱动力作用下,油气藏分布则不具有分形特征。油气藏储量分布的分形维数D值,近似反映油气运移有效驱动功率。油气运移有效驱动功率越大,分形维数D就越大,而油气运移有效驱动功率越小,分形维数D也越小。基于弱油气运移有效驱动力作用下的油气运移最小能耗率原理,是盆地油气藏分形特征形成的动力学机制及适用条件。
关键词:  油气藏储量  幂函数  分形维数  油气运移有效驱动功率  最小能耗率原理
DOI:10.3969/j.issn.1673-5005.2019.06.005
分类号::TE 122
文献标识码:A
基金项目:国家科技重大专项(2017ZX05072005)
Formative dynamic mechanism and applicable conditions of fractal characteristics of hydrocarbon reservoir
WANG Renyi1, LI Jiangtao2
(1.School of Petrochemical & Energy Engineering, Zhejiang Ocean University, Zhoushan 316022, China;2.PetroChina Qinghai Oilfield Company, Dunhuang 736202, China)
Abstract:
The fractal characteristics of formation dynamcis and favorable conditions of hydrocarbon reservoir were studied using reservoir dynamics and non-equilibrium thermodynamics. The results show that under a weak effective driving force of hydrocarbon migration, the distribution of hydrocarbon reservoir has a fractal characteristic. On the other hand, under a strength effective driving force of hydrocarbon migration, the distribution of hydrocarbon reservoir does not have a fractal characteristic. The value of fractal dimension D of hydrocarbon reservoir distribution roughly reflects the effective driving power of hydrocarbon migration. The larger the effective driving power is, the greater the fractal dimension D becomes, and vice versa. The principle of minimum rate of energy dissipation based on the weak effective driving force, is the dynamic mechanism and applicable conditions for the formation of fractal characteristics of oil and gas reservoirs in the basin.
Key words:  reserves of hydrocarbon reservoir  power function  fractal dimension  hydrocarbon migration effective driving power  principle of minimum rate of energy dissipation
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