中国西部与中亚前陆盆地油气地质特征类比分析

中亚及中国西部盆地自中生代以来，一直处于相同的大地构造位置—特提斯构造域的北缘。由于受到特提斯洋形成与演化的影响，两地区在中、新生代经历了相似的构造演化过程，即都经历了中生代-古近纪断陷-坳陷沉积阶段和新近纪以来的前陆盆地演化阶段，在中—新生代沉积特征等方面表现出许多共同特征，油气地质条件方面具有一定的相似性。然而，各盆地不同的基底特征及其具体的大地构造位置又使其油气地质特征等方面存在一定的差异性。油气勘探的实践表明，中亚盆地群蕴藏着丰富的油气资源，是世界上重要的油气富集区之一。因此，进行中国西部与中亚前陆盆地油气地质特征的类比研究，认真分析两地区油气成藏条件的差异，有助于正确认识中国西部盆地的油气地质特征和分布规律，从而有效地指导西部油气勘探。

ANALOGY ANALYSIS ON PETROLEUM GEOLOGICAL CHARACTERISTICS OF THE FORELAND BASINS BETWEEN WESTERN CHINA AND CENTRAL ASIA

Central Asia and Northwest China located at the northern side of Tethys have the similar evolution history of tectonic sedimentary process during Mesozoic to Cenozoic, which include the stage of fault depression and sag evolution during the Mesozoic-Paleogene period and the stage of foreland basin evolution from the Neogene period. This gives rise to many shared characteristics on Mesozoic-Cenozoic sedimentary sequences and petroleum geological conditions. However, the differences in the basement of basins and the concrete tectonic settings make their characteristics of petroleum geology being diverse. The practice of petroleum exploration shows that the Central Asian basin group holds in store abundant hydrocarbon resources and is one of the most important enriching section in the world. The analogy analysis of the petroleum geology of foreland basins between Western China and Central Asia will conduce to correctly understanding the regularities of hydrocarbons accumulation and distribution, and instruct the oil and gas exploration in the west of China.