陆相断陷盆地页岩油资源潜力评价——以东营凹陷沙三段下亚段为例
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摘要
页岩油资源潜力分析是页岩油勘探实践最重要的基础工作之一,可动资源量是最直接的资源潜力衡量指标。在借鉴页岩油资源评价和页岩油可动性等已有研究成果的基础上,分别应用氯仿沥青"A"参数法和热解参数法计算东营凹陷沙三段下亚段页岩油资源量和可动资源量。结果表明,2种方法的计算结果基本一致,页岩油资源量分别为11.39×10~8和11.57×10~8t。平面上,页岩油资源主要分布在各次级洼陷带,资源丰度为100×10~4～250×10~4t/km~2。纵向上,页岩油资源主要分布在埋深3 000～3 500 m,资源量为7.01×10~8t,其次分布在3 500～4 000 m,资源量为4.37×10~8t;从页岩油可动资源量来看,两者接近,分别为0.75×10~8和0.73×10~8t,但深部页岩油具有较高可动率。利津洼陷带具有较高的页岩油资源丰度和可动率,页岩油资源潜力大,为有利的页岩油勘探区。
Shale oil resource potential analysis is one of the most important basic works in shale oil exploration practice. Recoverable oil resource is the most direct index of resource potential evaluation. Based on the existing research results of shale oil resources evaluation and the recovery of shale oil,the total resources and recoverable resources of the shale oil in Lower Es_3 Member in Dongying Sag were calculated by the chloroform asphalt"A"method and the pyrolysis parameter method respectively. The calculation results show that the calculation results obtained by the two methods are basically consistent,which are 1 139 million tons and 1 157 million tons respectively. The shale oil resources are mainly distributed horizontally in the central zone of the subsags,which the abundance of the resources is between1 million and 2.5 million t/km~2.Vertically,the shale oil resources are mainly occurred at the depth from 3 000 m to 3 500 m with 701 million tons shale oil resources,followed occurred at the depth from 3 500 to 4 000 m,which is 437 million tons shale oil resources. However,the amount of recoverable resources of shale oil are roughly equivalent at those two deep segments,which is 75 million tons and 73 million tons respectively. Shale oil located deeply has a higher recoverable rate. Lijin Subsag has high shale oil resource abundance and recovery mobility,high shale oil resource potential,and is a favorable area for shale oil exploration.
Shale oil resource potential analysis is one of the most important basic works in shale oil exploration practice. Recoverable oil resource is the most direct index of resource potential evaluation. Based on the existing research results of shale oil resources evaluation and the recovery of shale oil,the total resources and recoverable resources of the shale oil in Lower Es_3 Member in Dongying Sag were calculated by the chloroform asphalt"A"method and the pyrolysis parameter method respectively. The calculation results show that the calculation results obtained by the two methods are basically consistent,which are 1 139 million tons and 1 157 million tons respectively. The shale oil resources are mainly distributed horizontally in the central zone of the subsags,which the abundance of the resources is between1 million and 2.5 million t/km~2.Vertically,the shale oil resources are mainly occurred at the depth from 3 000 m to 3 500 m with 701 million tons shale oil resources,followed occurred at the depth from 3 500 to 4 000 m,which is 437 million tons shale oil resources. However,the amount of recoverable resources of shale oil are roughly equivalent at those two deep segments,which is 75 million tons and 73 million tons respectively. Shale oil located deeply has a higher recoverable rate. Lijin Subsag has high shale oil resource abundance and recovery mobility,high shale oil resource potential,and is a favorable area for shale oil exploration.
引文
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[20]卢双舫,陈国辉,王民,等.辽河坳陷大民屯凹陷沙河街组四段页岩油富集资源潜力评价[J].石油与天然气地质,2016,37(1):8-14.LU Shuangfang,CHEN Guohui,WANG Min,et al.Potential evaluation of enriched shale oil resource of Member4 of the Shahejie Formation in the Damintun Sag,Liaohe Depression[J].Oil&Gas Geology,2016,37(1):8-14.
[21]陈小慧.页岩油赋存状态与资源量评价方法研究进展[J].科学技术与工程,2017,17(3):136-144.CHEN Xiaohui.Advances in the research on the occurrence state and resources assessment of shale oil[J].Science Technology and Engineering,2017,17(3):136-144.
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