中国西北地区主要油气勘探领域勘探难题与技术对策

TECHNICAL COUNTERMEASURES AND MAIN EXPLORATION DOMAINS ANALYSIS,NORTHWEST OF CHINA

西北地区油气资源丰富,勘探潜力较大,是我国陆上油气勘探的重要接替领域。全国第三次油气资源评价结果表明,西北地区石油资源主要集中在鄂尔多斯、塔里木、准噶尔、柴达木四大盆地和吐哈、酒泉两个中小型盆地;天然气资源主要集中在鄂尔多斯、塔里木、柴达木三大盆地。指出西北地区含油气盆地大地构造环境、油气地质特征和勘探条件与东部含油气盆地相比具有许多特殊性和复杂性。认为前陆冲断带、地层岩性油气藏、克拉通盆地中下组合、油田老区四大领域是西北地区未来油气勘探的重要领域;面临许多复杂而特殊的地质难题和技术难题,西北各油气区需要不断创新地质理论和勘探技术,走技术发展之路。

Northwest of China, which is enrichment in petroleum reserves and widely in exploration domain, is a main relay exploration domain on the mainland of China. The third stock assessment show that the oil reserve mainly spread in the large-scale basin of Ordos, Tarim, Junggar, Qaidam and mediummini basin of Turpan-Harmy, Jiuquan, the gas reserve mainly spread in Ordos, Tarim and Qaidam basins. Contrast to the eastern oil-gas bearing basins, the regional tectonic background, petroleum geological features and exploration conditions of basins in northwest of China are more special and complicate. Foreland thrust belts, litho-stratigraphic reservoir, medium-lower formations of craton basin and mature areas of oil-gas fields are composed of the main exploration domains for future petroleum exploration. These domains are faced much special and complex geological and technical trouble for deep exploration. For further exploration, the unceasing innovation of geology theory and exploration technique is needed and the technique developing will play an important role in practical exploration.