关键词: 新思路, 古俯冲消减碰撞带, 幔流底辟构造, 克拉玛依油区

Abstract: Geological interpretation and thorough research are carried out based on the data of "the deep artificial seismic sounding profiles of Emin- Karamay-Qitai" in the report of "the integrated engineering detection of the structural framework of Junggar Basin" accomplished in July 2001. In this paper, the author puts forward that the oil source of Karamy-Urumqi oil province does not lies in Mahu Depression but in the middle and lower crust 28- 38km below Karamay-Zhayier Mountains. Based on the data analysis of the bitumen from Wuerhe, oil, gas, water, and cores, it is proved that oil and gas are migrated to Karamay-Urumqi oil province through the supracrustal and discordogenic fault and numerous nappe thrusts on the east and west sides of the oil source bed, in which the oil sources contain plenty of organic matters from marine and terrestrial sediments. The distribution characteristics of various reservoirs and oil-gas seepages of Karamay-Urumqi oil province also show that the oil sources of the oil province are vertically migrated. Suggestions are put forward in this paper to promote the exploration oil in Karamay Oilfield.

Key words: new approach, paleo-subduction and collision zone, diapiric structure of mantle current, Karamay oil province