摘要
南海东北部边缘台西南盆地泥火山主要展布于该盆地南部凹陷陆坡深水区和台湾陆上台南—高雄地区。陆上泥火山多沿深大断裂带分布,地面形态特征类似火山地貌,多具有下凹喷口,海域泥火山的海底形态亦与其相似,但研究程度较低。通过深入分析台西南盆地泥火山发育特点及伴生天然气地球化学特征,认为该区泥火山伴生烃类天然气成因类型较多,但以成熟—高熟煤型烃类气为主;其伴生的非烃气中CO2含量较高,但分布较局限且以无机壳源型CO2为主。泥火山的泥源层主要来自中新统及上新统海相坳陷沉积的巨厚泥页岩,本身具生烃潜力,其成熟生烃及与泥火山运聚通道和伴生构造圈闭的良好配置,则构成了其独特的泥火山油气藏运聚成藏系统,进而控制了这种"泥火山型油气藏"的分布。
Mud volcanoes in Taixinan basin are located in the continental deep-water district in the south depression and the Tainan-Kaohsiung district in Taiwan. They are distributed along the discordogenic fault and usually have calderas also sea floors like volcanoes. Mud volcanoes have many styles of associated gas, dominated by the mature-post mature coaliferous gas, and have abundant COe mainly of the inorganic-crustal style. The mud formations are Miocene and Pliocene marine mud shales which are source rocks, and they form an effective migration and accumulation system with the channels and affiliated structures generated by the mud volcanoes, thus controlling the distribution of oil and gas.
出处
《天然气地球科学》
EI
CAS
CSCD
北大核心
2009年第6期872-878,共7页
Natural Gas Geoscience
基金
国家重点基础研究发展计划项目(编号:2007CB41170501
2009CB219501)联合资助.
关键词
台西南盆地
泥火山
泥源层
地质地球物理特征
泥火山伴生气
Taixinan basin
Mud volcano
Mud source layer
Geological and geophysical characteristics
Associated gas.
