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对准噶尔、塔里木等盆地沉积环境的研究表明，在古生代，中国西北区为海相沉积，沉积盆地的基底是一些离散的古老结晶地块，其上海水侵漫，其间为大洋或窄大洋的海槽。地块之间的海槽或地块与海槽过渡的边缘带盆地是油气形成的有利地带。在海槽遭受压缩褶皱而回返的造山过程中，“地块－海槽”体系发生转化，形成中新生代“山系－盆地”的陆相沉积体系。这时，边缘带的油气源岩系被埋藏在盆地边缘和外围的山系之下。但这些油气源程序形成的部分油气已经运移到盆地内的储集层中聚集，形成“外生内储”的油气藏。这种类型的盆地中，存在陆相生油和海相生油，“内生内储”和“外生内储”的两类生油岩系和两种生储组合配置体系。“地块－海槽”边缘带油气形成观点的提出，突破了以现今盆地为界限研究古生代油气形成分布规律的传统观念，增大了中国西北区可以发现的油气资源量，扩展了找油找气的新领域，具有十分重要的意义。
The research on sedimentary environment in the Junggar and Tarim Basin shows that in the Paleozoic, the sedimentary basin in the northwest China is a marine sedimentary. The basement of the sedimentary basin is some discrete ancient crystalline massif. The upper water invades the sea, and the ocean is in the ocean or narrow ocean groove. The troughs between the blocks or the marginal zone of the transition between the block and the trough are favorable areas for oil and gas formation. During the orogenic process of compression and folding of the trough and the return of the trough, the “block-trough” system is transformed to form the Meso-Cenozoic “mountain-basin” continental depositional system. At this time, the oil and gas source rocks in the marginal zone are buried under the mountain system on the edge and periphery of the basin. However, some of the oil and gas sources formed by these oil and gas sources have migrated to the reservoirs within the basin to form an “exogenous internal reservoir” reservoir. In this type of basin, there are two types of oil-bearing rock systems and two kinds of mixed storage and disposition systems of land-derived oil and marine oil, “endogenous internal storage” and “exogenous internal storage”. The proposal of formation of oil and gas on the margins of the “block-trough” broke through the traditional concept of studying the formation and distribution of Paleozoic hydrocarbons from the current basin boundaries, increasing the amount of oil and gas resources that can be found in the northwestern part of China and expanding the search for oil The new area of gas is of great significance.