论羌塘盆地油气勘探前景

Prospect of the potential of oil and gas resources in Qiangtang Basin,Xizang(Tibet)

羌塘盆地与中东油气区同属于特提斯构造域,是我国陆上新区面积最大的海相盆地。近20年来,我国油气地质工作者在条件极其艰苦的藏北高原开展了系统的油气地质调查和研究工作,完成了从含油气盆地分析到资源潜力评价、战略选区、靶区预测、井位论证及实施科探井的全过程,获得了一系列新发现和新认识,提出了羌塘盆地是我国最有希望取得突破的油气勘探新区。但是,对上述认识也还存在不同的看法,特别是对油气保存条件和盆地生烃潜力,还存在"好"与"不好"两种截然不同的观点。本文根据最近完成的羌塘盆地科探井工程(羌科-1井)及其配套的地质—地球物理工作所取得的最新资料,结合近20年来羌塘盆地油气地质调查所取得的成果,重点围绕烃源岩与保存条件这两个方面,对羌塘盆地油气地质特征进行论述,力求客观、准确评价羌塘盆地油气保存条件,同时分析、预测了盆地生烃潜力及油气远景,并提出下一步油气勘探建议,以期持续推进羌塘盆地未来油气勘探工作,早日实现盆地油气勘探重大突破。

The Qiangtang Basin in northern Xizang(Tibet),as the Middle East Oil and Gas Provinces belongs to the Tethys tectonic domain,is the largest marine facies petroliferous new region for exploration in China.During the past two decades,geologists in China have carried out systemic oil and gas geological survey and research under extremely difficult working conditions in the northern Xizang(Tibet)Plateau,completing oil-and-gas-bearing basin analysis,resource potential evaluation,strategic prediction of the potential blocks,demonstrations on target locations and implementation of Qiangtang Scientific Drilling Project(QK-1 well),resulting in a series of new discoveries and insights,and proposed that the Qiangtang Basin is the most promising new oil and gas exploration region in China.However,there are still different opinions on the above-mentioned viewpoints,there are two completely different understandings of"good"and"bad"especially regarding the oil and gas preservation conditions and the hydrocarbon generation potential of the basin.This article is based on the latest data obtained from the recently completed Qiangtang Scientific Drilling Project(QK-1 well)and its supporting geological survey,combined with the results of the recent 20 years of oil and gas geological survey in the Qiangtang Basin,focused on the two key scientific issues of sources rock and preservation conditions,given a brief introduction to the oil and gas geological conditions of the Qiangtang Basin,try to objectively and accurately review the oil and gas preservation conditions of the Qiangtang Basin,analyze the hydrocarbon generation potential and oil and gas prospects of the basin,and put forward suggestions for next oil and gas exploration,and so as to advance the future oil and gas exploration work in the Qiangtang Basin and achieve a major breakthrough in the oil and gas exploration of the basin as soon as possible.