中国古生界油气勘探成果及勘探战略思考

Palaeozoic hydrocarbon exploration achievements and strategies in China

1984年9月22日塔里木盆地沙参2井在井深5 391 m的奥陶系获得高产油气流,开辟了中国古生代海相油气勘探的新篇章,成为中国油气勘探史上的重要里程碑,拉开了全国古生界海相油气勘探第二次大跨越的序幕。此后的30多年,先后在塔里木、准噶尔、鄂尔多斯、四川等盆地共发现了近30个大油气田,使中国油气储量和产量不断攀升,创立了中国古生界海相油气成藏理论,形成了具世界领先水平的中国古生界海相油气勘探开发技术系列。在分析总结近30多年来中国古生界海相油气勘探成果的基础上,提出了2030年以前古生界海相油气勘探的方向,包括4个战略扩展区、9个战略突破区和5个战略准备区,分述如下,战略扩展区是塔里木盆地、准噶尔盆地、鄂尔多斯盆地、四川盆地;战略突破区是塔里木盆地西南坳陷、阿瓦提断陷、孔雀河斜坡,准噶尔盆地东部隆起、乌伦古坳陷,柴达木盆地东北部上古生界,鄂尔多斯盆地北部和西北部下古生界,四川盆地北部,中扬子江汉盆地及周缘、湘西—湘中地区,下扬子古生界,滇黔桂地区古生界,华北盆地石炭—二叠系;战略准备区是河西走廊地区石炭—二叠系,东北地区石炭—二叠系,青藏地区、羌塘地区等,江西、鄱阳湖—三青江地区石炭—二叠系,海域的南黄海地区。

On September 22, 1984, high-yield hydrocarbon was produced in Well Shacan 2 from Ordovician at a hole depth of 5391 m in the Tarim Basin. As the important milestone in the history of Chings oil and gas exploration, it launched the new age and opened up the prelude of the second great leap for Palaeozoic marine oil and gas exploration in China. In the following over 30 years, more than 30 large oil and gas fields have been discovered in the Tarim, Junggar, Ordos and Sichuan basins, making China＇s oil and gas re- serves and production rise continuously. Meanwhile, Chings Palaeozoic marine oil and gas reservoir-forming theories have been set up and a series of internationally advanced oil and gas exploration and development technologies have been developed for Palaeozoic ma- rine oil and gas in China. In this paper, analysis is made on China＂ Palaeozoic marine oil and gas exploration achievements in the past 30 years, and then the Palaeozoic marine oil and gas exploration directions before 2030 are provided for four strategic extension zones, nine strategic breakthrough zones and five strategic preparation zones. The strategic extension zones include the Tarim, Jung- gar, Ordos and Sichuan basins. The strategic breakthrough zones consist of Southwest depression, Awati fault depression and Kongque river slope in the Tarim Basin, East uplift and Wulungu depression in the Junggar Basin, the Upper Palaeozoic in the north- eastern Qaidam Basin, the L0wer Palaeozoic in the northern and northwestern Ordos Basin, the northern area in the Sichuan Basin, Jianghan Basin and its periphery and western-central Hunan Province in the middle Yangtze region, the Palaeozoic in the lower Yan- gtze region, the Palaeozoic in Yunnan, Guizhou and Guangxi provinces, and the Carboniferous-Permian in the Huabei Basin. The strategic preparation zones are the Carboniferous-Permian in the area of the Hexi Corridor, the Carboniferous-Permian in the area of Northeast China, Qinghai-Tibet area, Qiangtang area, the Carboniferous-Permian in the area of Poyang Lake - Sanqing River in Jian- gxi Province, and the South Yellow Sea.