摘要
为了解阜新盆地浅层致密砂岩气成藏条件,应用有机岩石学和有机地球化学方法,对气源岩特征开展研究。认为该区浅层致密砂岩气气源岩为沙海组四段泥岩、沙海组三段煤层和泥岩;气源岩厚度大且埋藏浅(<1500 m),有机质丰度高(TOC>2%),生烃潜力强;有机质类型沙海组四段为Ⅲ(偏ⅡB)型干酪根,沙海组三段为Ⅲ型干酪根;气源对比显示沙海组三段和沙海组四段气源岩与沙海组三段浅层致密砂岩气同源,浅层致密砂岩气紧邻源岩。表明研究区气源岩能生成大量天然气,利于形成浅层致密砂岩气藏。
In order to know the conditions of shallow tight sand gas reservoir formation, the gas-source rock was studied in Dongliang district in the Fuxin basin on the basis of organic petrological and geochemical study. The source rock is mudstone of the fourth member and mudstone and coal-bed of the third member of Sahai Formation. The source rock is thick and buried shallowly （〈1 500 m）with high organic matter （TOC〉2%） and kerogen type Ⅲ and Ⅱ B. Gas source correlation shows that the gas of Sahai formation and shallow tight sand is allied. The gas host and the source rocks occur closely together indicating that it is favorable for the huge volume of gas generated by the source rock to form gas reservoir in the shallow tight sand.
出处
《地质找矿论丛》
CAS
CSCD
2007年第1期71-75,共5页
Contributions to Geology and Mineral Resources Research
关键词
浅层致密砂岩气
气源岩
沙海组
阜新盆地
shallow tight sand gas
gas source rock
Sahai Formation
Fuxin basin
