摘要
中国西部复杂叠合盆地成藏期后的构造运动十分剧烈,直接导致大量油气藏发生调整改造,甚至破坏。构造变动强度是一个用以衡量区域构造运动对成藏期后油气藏调整改造程度大小的重要参数。研究中采用了易于获得的两个地质参数,即剥蚀率和地层变形程度作为定量化指标,拟合出构造变动强度的定量化公式。构造强度中等地区由于易于形成一定规模的正向圈闭构造,封盖条件得以保证,同时有利于输导体系的建立,因此有利于油气藏的聚集和再富集;而构造强度过大和过小,则不利于油气的调整富集成藏。与准噶尔盆地的油气分布对照得到,构造变动强度的定量化表征基本上可以如实和准确地反映出构造变动对油气调整改造的影响程度。
There were very fierce of tectonic movements after the hydrocarbon accumulation periods in the complicated and superimposed basins in West China, which resulted in the adjustment, reformation and even destroy of a large mount of hydrocarbon reservoirs. The tectonic intensity is an important parameter for measuring the influence level of tectonic movement on the reservoir after accumulation. The two parameters of denudation rate and stratum deformation degree can be used to fit the quantitative characterization formula of tectonic movement intensity. The verification and application of the formula show that the moderate tectonic intensity regions easily make for forming normal trap structures, the cap rock can be well preserved, and the transportation systems will be easily constructed. Therefore, the regions with the middle level of tectonic intensity will be favorable for hydrocarbon accumulation and enrichment. The regions with large or low level of tectonic intensity have few conditions for hydrocarbon accumulation. The contrast to the distribution of oil-gas reservoir in Jungger Basin shows that the fitted formula for characterizing the tectonic intensity can well and truly describe the influence of tectonic movement on alteration of oil gas reservoirs.
出处
《石油学报》
EI
CAS
CSCD
北大核心
2009年第5期642-647,共6页
Acta Petrolei Sinica
基金
国家重点基础研究发展规划(973)项目(2006CB202300)部分成果
关键词
叠合盆地
构造强度
定量化指标
调整改造
剥蚀率
变形程度
superimposed basin
tectonic intensity
quantification index
adjustment and alteration
denudation rate
deformation degree
