塔里木盆地深层气勘探潜势

随着浅层天然气资源勘探难度的增大,进行深层天然气勘探已成必然趋势。塔里木盆地位于中国西部,是中国最大的沉积盆地。在盆地内广泛发育有寒武系-奥陶系、石炭系-下二叠统和三叠系-侏罗系等 3套优质烃源岩,以及多套优质储层和盖层,形成了 5套区域性储盖组合。因而,该盆地具有良好深层天然气形成、储集和保存的物质基础。再结合塔里木盆地目前勘探形势,指出该盆地库车坳陷、塔北隆起、塔中隆起、巴楚隆起和塔西南坳陷具有广阔的深层气勘探前景。

THE EXPLORATION POTENTIAL STUDY OF DEEP SEATED GAS IN TARIM BASIN

With the shallow natural gas exploration becoming difficult at present ,deep-seated natural gas exploration has become the hot issue. Tarim basin, which is situated in the western part of China, is the biggest sedimentary basin in China. The study result show that Tarim basin has three major better hydrocarbon source rocks, which are the Cambrian-Ordovician, Carboniferous-lower Permian and Triassic-Tertiary source rocks, and high efficiency gas reservoirs and seal rocks, forming five sets of regional associations of gas reservoir and capping bed. Therefore, the basin has better physical condition for deep-seated gas generation, storage and conservation. Based on the present condition of gas exploration, the authors point out that Kuche depression, Northern uplift, Central uplift, Bachu uplift and South-western depression in Tarim basin has wider exploration prospect for deep seated gas.