塔里木盆地天然气资源丰富,在库车坳陷、塔中隆起和塔北隆起勘探成效显著。目前塔里木盆地天然气勘探拓展需求日益增加,需要对盆地天然气形成地质条件进行深化总结,分析盆地天然气资源潜力,更好地指导勘探工作。为此,对塔里木盆地前陆区、台盆区常规天然气和非常规天然气形成地质条件进行分析,明确不同地区和不同类型天然气形成主要控制因素,并总结不同地区天然气成藏模式。详细介绍了塔里木盆地第四次油气资源评价过程中常规天然气和非常规天然气评价方法及结果。最新评价结果显示,塔里木盆地常规天然气资源量为117 398.96×108m3,非常规天然气(包括致密砂岩气和页岩气)资源量约为3×1012m3。并对盆地剩余天然气分布特征进行分析,指出剩余天然气分布的主要构造单元和层系,为进一步明确塔里木盆地今后天然气勘探方向提供了科学依据。
The natural gas resource is abundant in Tarim Basin.During these years,exploration achievements of natural gas are mainly in Kuqa foreland basin,Tazhong uplift and Tabei Uplift.With the increasing demand of natural gas resource,the geological condition of natural gas needs to be deepened and the natural gas resource potential of Tarim Basin needs to be evaluated.We analyze the geological condition of natural gas in foreland area and cratonarea,investigate the key factors controlling natural gas accumulation in different areas and different types of resource,and set up natural gas accumulation models for different areas.We also introduce the methods and result of resource evaluation in Tarim Basin.According to the recent evaluation,there are 117 398.96×108m3 conventional gas resources and 30 000×108m3 unconventional gas resources in Tarim Basin.By analyzing the distribution of residual natural gas resources,we point out the main structural units and layers that are with the most residual natural gas resources.This research will provide scientific base for future natural gas exploration in Tarim Basin.
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