准噶尔盆地陆东-五彩湾地区石炭系火山机构类型及其油气勘探

准噶尔盆地陆东-五彩湾地区石炭系火山岩油气勘探近年来取得了突破，表明该区具有进一步开展油气勘探的潜力。为有效指导该区石炭系火山岩油气勘探，应用岩心、录井、测井、地震、重力、磁力和建场测深资料，通过火山岩成因、岩性、岩相、喷发序列组合和空间分布研究，探讨了陆东-五彩湾地区石炭系火山机构类型。认识到陆东-五彩湾地区石炭系火山岩岩性复杂，以安山岩、火山角砾岩、凝灰岩和沉凝灰岩为主，岩相类型以爆发相、溢流相和火山沉积相最发育。该火山岩发育了两种典型喷发序列组合，一种以中酸性熔岩与火山碎屑岩共同发育为特征．发育在滴西21井区～滴西11井区。为层火山产物；另一种以中基性熔岩的大面积分布为特征。发育在五彩湾和滴水泉凹陷，为盾火山产物。两种火山机构的提出将对陆东-五彩湾地区石炭系火山岩勘探起到重要指导作用。

Volcano Types of Carboniferous and Implication of Hydrocarbon Exploration in Ludong-wucaiwan Region of Junggar Basin

The hydrocarbon exploration of carboniferous volcanic rocks was succeeded in Ludong-Wucaiwan Region of Junggar Basin, it was indicated that it had the potential for oil and gas exploration in this area. To guide the hydrocarbon exploration effectively, the data of genesis, lithologies, facies, eruption succession assemblages and space distribution of the carboniferous volcanic rocks in Ludong-Wucaiwan Region were used based on core, mud logging, wireline logging, seismic data, gravity, magnetism and build-up depth data and their volcano types were (discussed. Study shows that the volcanic rock types are predominantly of andesites, volcanic breccias, tuffs and tuffites that resulted fromi explosion, effusion and volcanic sedimentation facies for the most parts. The volcanic rocks in Ludong-wucai-wan Region develop two typical types of eruption succession assemblages. One is characterized as intermediate-acidic lava and pyroclastic rock interbeds, they are products of stratovolcanoes development in the area of Dixi 21 to Dixi 11, the other behaves as wide distribution of intermediate-basic lavas, which may pile up from shield volcanoes at the Wucaiwan and Dishuiquan Sags. The two volcanic rock types provide an important guidance for oil and gas exploration in Ludong-Wucaiwan Region of Junggar Basin.