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引用本文:康玉柱. 塔里木盆地塔河大油田形成的地质条件及前景展望[J]. 中国地质, 2003, 30(3): 315-319.
KANG Yu-zhu. Geological characteristics of the formation of the large Tahe oilfield in the Tarim basin and its prospects[J]. Geology in China, 2003, 30(3): 315-319(in Chinese with English abstract).
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塔里木盆地塔河大油田形成的地质条件及前景展望
康玉柱
中国石化西北石油局,新疆 乌鲁木齐市 830011
摘要:
提要:塔里木盆地北部塔河大油田是我国第一个古生界大油田。它是1990~1997年发现的,2002年已控制含油气面积约1000 km2,已获探明油气储量为2.5×108t。它的发现对塔里木盆地乃至全国寻找这一类型油气田具有重要指导意义,笔者论述了塔里木大油田的沉积是属古克拉通盆地坳陷型的海相碳酸盐岩;它处于克拉通古隆起—沙雅隆起上,而且断裂和区域性不整合十分发育,有利于油气富集;由于它南邻满加尔生油坳陷,成为油气运移的指向区;经海西期两次构造运动造就了本区奥陶系古岩溶十分发育,形成了孔-洞-缝良好的储集体。并有4期油气运聚和成藏过程等是形成大油气的基本条件。预测该油田可形成8×108~10×108t的特大型油田。
关键词:  油田  构造  古岩溶  圈闭
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Geological characteristics of the formation of the large Tahe oilfield in the Tarim basin and its prospects
KANG Yu-zhu
Northwest Petroleum Bureau, China National Petrochemical Corp., Urumqi 830011, Xinjiang, China
Abstract:
Abstract:The Tahe oilfield in the northern part of the Tarim basin is China’s first largest Paleozoic oilfield. It was discovered from 1990 to 1997. By 2002 a petroleum-bearing area of ~ 1000 km2 was controlled, with explored reserves of 250 million tons. Its discovery has great significance for guiding the search for this type of oilfield in the Tarim basin and even the whole of China. The author thinks that sediments in the Tarim oilfield are depression-type marine carbonate rocks in the ancient cratonic basin. It is located in a cratonic paleo-uplift-Shaya uplift, where faults and regional unconformities are very well developed, which are favorable for the concentration of oil and gas. As it adjoins the Manjiar oil-generating depression on the south, it is a good vector area for oil and gas migration. Two Hercynian tectonic movements resulted in the development of Ordovician paleokarst, thus giving rise to reservoirs with good pores, caves and fissures. Moreover, the occurrence of four phases of oil and gas migration and accumulation is the basic condition for the formation of a large oil/gas field. This oilfield is expected to become an exceedingly large oilfield with oil reserves of 800 million to 1 billion tons.
Key words:  oilfield  structure  paleokarst  trap