基于空间网格插值的重油油藏资源量计算方法——以扎格罗斯白垩系重油层资源评价为例

发布时间：2018-08-06 22:11

【摘要】：重油具有黏度大、大规模连续聚集、储层非均质性强、难于开采等特征,利用传统的体积法评价其资源潜力无法揭示重油资源在空间三维尺度上的富集差异性或预测"甜点区"的分布。空间网格插值法基于地理信息系统技术,以成藏组合为基本评价单元,划定各单元分布面积,统计和分析每个成藏组合储层的厚度、含油饱和度、孔隙度、采收率4个关键参数的空间分布规律,并根据实际情况选择反距离加权插值、克里金插值等方法进行插值,实现关键参数网格图的空间叠加计算,最终计算出每个成藏组合的重油资源丰度图,定量表征重油资源的空间分布,厘定重油"甜点区"。将该方法应用于中东扎格罗斯褶皱带重油资源潜力评价,揭示三叠系-侏罗系Butmah成藏组合、侏罗系成藏组合、白垩系成藏组合以及第三系成藏组合总可采资源潜力为140亿t。其中,未来有利勘探目标为白垩系成藏组合,可采资源量为85亿t。初步预测"甜点区"位于盆地西南部。
[Abstract]:Heavy oil has the characteristics of large viscosity, large scale continuous aggregation, strong heterogeneity and difficult to exploit. Using traditional volume method to evaluate its resource potential can not reveal the accumulation difference of heavy oil resources on the spatial scale, or predict the distribution of "dessert area". Spatial grid interpolation method is based on Geographic Information system technology and is used as a reservoir combination. The basic evaluation unit delineates the distribution area of each unit, statistics and analyses the spatial distribution of the 4 key parameters of each reservoir, including oil saturation, porosity and recovery, and selects the inverse distance weighted interpolation, Kriging interpolation and other square methods according to the actual conditions to realize the space superposition of the key parameters of the grid. In the final calculation, the heavy oil resource abundance map of each reservoir combination is calculated, the spatial distribution of heavy oil resources is quantified and the "sweet spot area" of heavy oil is determined. This method is applied to the evaluation of heavy oil resource potential in the Middle East Jager Ross fold belt, and reveals the combination of the Triassic and Jurassic Butmah accumulation, the Jurassic reservoir formation, the Cretaceous reservoir formation and the third. The total recoverable resource potential of the three series of three series reservoirs is 14 billion, and the future favorable exploration target is the Cretaceous reservoir formation combination, and the recoverable resource is 8 billion 500 million T. preliminarily, and the "dessert area" is located in the southwest of the basin.
【作者单位】：中国石油勘探开发研究院全球资源与规划研究所;中国石油勘探开发研究院亚太研究所;吉林大学地球科学学院;
【基金】：国家“十二·五”科技重大专项项目(2011ZX05028-002) 中国石油天然气股份有限公司重大科技专项项目(2012E-0501)~~
【分类号】：P618.13

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