麦盖提斜坡玛南构造带鹰山组原油包裹体荧光光谱特征

Fluorescence Characteristics of Oil Inclusions of Yingshan Formation in Ma'nan Structural Belt of Maigaiti Slope

为查明麦盖提斜坡玛南构造带鹰山组油气成藏规律,对原油包裹体的荧光光谱进行定量化描述,利用其主峰波长λ_(max)、红绿熵Q及Q_(F535)等属性参数,识别出玛南构造带鹰山组储集层中发育橙色、黄绿色、蓝绿色、蓝白色4种荧光颜色的原油包裹体,它们分别代表了在4幕原油充注,原油包裹体主峰波长λ_(max)与Q_(F535)分布在4个区域,荧光光谱Q_(F535)逐渐减小,反映了包裹体所捕获原油的成熟度逐渐增高。其中Ⅰ幕、Ⅱ幕和Ⅲ幕原油充注对现今鹰山组油气藏的贡献大于Ⅳ幕,Ⅰ幕为早期低成熟度原油充注,Ⅱ幕、Ⅲ幕和Ⅳ幕为晚期较高成熟度原油充注。

In order to understand the hydrocarbon accumulation of Yingshan formation in Ma＇ nan structural belt of Maigaiti slope, the paper quantitatively describes the fluorescence spectrum of oil inclusions and identifies the oil inclusions with 4 fluorescent colors of orange, yellow-green, blue-green and blue-white by using peak wavelength （λmax）, red-green quotient （Q）and QF535 parameters, which represents 4 different stages of oil and gas charging, respectively. The peak wavelength（λmax） and QF535 of oil inclusions are distributed in 4 different areas. The decrease of QF535 value reflects the gradual increase of the maturity of the oil trapped by inclusions. Hydrocarbon charging during stages I, II and III made more contributions to the current oil and gas reservoirs of Yingshan formation than that of stage IV. The stage I is low-maturity oil charging at the early stage and the stages II,III and IV are high-maturity oil charging at the late stage.