准南前陆冲断带剩余油气资源评价

Residual hydrocarbon resource evaluation in southern Junggar foreland thrust belt

准南前陆冲断带油气资源认识与勘探实际之间存在矛盾,亟需开展油气资源的重新评价.根据油藏规模序列法存在的不足,采用改进的油藏规模序列预测模型,应用最新勘探成果数据,对准南前陆冲断带的油气资源进行预测.结果表明:准南前陆冲断带未发现油气藏89个,剩余可探明油气储量约为11 543.6×104t,是已探明地质储量的近2倍.准南已发现油气藏8个,已探明的最大油藏规模为1 732.4×104t,是预测最大油藏规模5 130.7×104t的1/3,结合构造演化及圈闭类型特征,综合分析认为该区的勘探重点应转向规模更大、勘探难度更高的隐蔽类圈闭上.

Hydrocarbon resource evaluation needs to be developed again because of contradiction between cognition and actual exploration of hydrocarbon resource in Southern Junggar Foreland Thrust Belt.According to reservoir size sequential method deficiency,hydrocarbon resource in Southern Junggar Foreland Thrust Belt was predicted with improved reservoir size sequential model,making use of the latest exploration data.Research indicates that in Southern Junggar Foreland Thrust Belt,89 reservoirs are not found and residual proved reserves are about 11 543.6×104 t,which is 2.0 times known proved reserves,reflecting higher exploration potential.At the same time,there are 8 reservoirs are found and the largest reservoir size of known proved reserves is 1 732.4×104 t,one third predicted ones,which is 5 130.7×104 t.Combined with characters of tectonic evolution and trap types,emphases of exploration in this area should be turned about subtle traps with larger size and more difficult exploration degree after comprehensive analysis.