摘要
综合运用多种成熟度参数以及岩石显微观察、储层沥青测试、颗粒荧光分析等技术,剖析了克拉苏构造带油气热演化程度和油气动态成藏过程。研究认为,克拉苏构造带的原油由成熟和高成熟油组成,油气充注过程为"早期成熟油、晚期高成熟油和高—过成熟气",早期形成的盐下古油藏受新近纪晚期断裂的破坏和高—过成熟油气的驱替,部分原油向上进入盐上浅层背斜圈闭汇聚成藏。随着膏盐岩盖层塑性增强,穿盐断裂消失,盐下圈闭再次聚集高—过成熟的油和气。克拉苏构造带博孜段具有巨大的勘探潜力,同时应重视浅层背斜油藏的勘探。因此厘定油气的成熟度和油气动态成藏过程对查明盆地油气构成和勘探方向具有重要意义。
The thermal evolution and dynamic accumulation process of hydrocarbon in the Kelasu structural belt were analyzed using various maturity parameters, microscopic observation of rock, reservoir bitumen testing, and particle fluorescence analysis techniques. Studies suggested that the crude oils in the study area are mature and high-mature. Mature oil charged during the early stage while high-mature and over-mature oils charged during the late stage. The subsah ancient reservoirs formed in the early stage were destructed by faults during the late Neo- gene, and were partially forced by high-mature and over-mature oils into shallow anticlinal traps. As the plastici- ty of gypsum caprock enhanced, faults through salts disappeared, and high-mature and over-mature oils accumu- lated again in subsalt traps. The Bozi segment of the Kelasu structural belt has great exploration potential, and the shallow anticlinal reservoirs should be paid attention to. Therefore, the determination of petroleum maturity and the dynamic accumulation process are important for identifying oil and gas composition and exploration in petroliferous basins.
出处
《石油实验地质》
CAS
CSCD
北大核心
2013年第3期249-254,268,共7页
Petroleum Geology & Experiment
基金
国家科技重大专项"大型油气田及煤层气开发"(2008ZX05003)资助
关键词
古油藏
气洗分馏
成藏过程
勘探领域
克拉苏构造带
库车坳陷
塔里木盆地
ancient reservoir
gas washing fractionation
accumulation process
exploration area
Kelasu struc- tural belt
Kuqa Depression
Tarim Basin
