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OALib Journal期刊
ISSN: 2333-9721
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eur分布类比法在川中地区侏罗系致密油资源评价中的应用
Keywords: eur分布类比法,致密油,川中侏罗系,资源评价
Abstract:
？四川盆地侏罗系具致密油资源形成的条件，前人资源评价结果差别较大，需采用非常规的资源评价方法进一步认识其资源潜力。川中地区侏罗系致密储层石油生产井数据多，能使用eur(estimatedultimaterecovery)分布类比法计算资源量。将eur分布类比法分为6个基本步骤，在油气生产井多，生产时间长的地区能快速估算研究区的可采资源量。应用eur分布类比法计算川中侏罗系致密储层石油的eur分布，建立了eur的地质评价标准，并估算了公山庙、桂花2个油区的可采资源量。结果表明:川中地区侏罗系3套主力产层中，50%概率下沙一段ⅰ类区单井eur值可达3×10t，凉上段ⅰ类区的单井eur值可达2.8×10t，大安寨段ⅰ类区的单井eur值为2.5×10t，有效烃源岩的厚度、裂缝发育程度、有效烃源岩厚度与储层厚度的比值对eur值的影响最大|川中地区侏罗系致密油ⅰ类区50%概率的生产井井控面积约为1.4km2，ⅱ类区的井控面积主体在0.75～1km2之间，ⅲ类区井控面积约为0.35～0.45km2;使用eur分布类比法估算公山庙、桂花2个油区近2000km2范围内3套主力产层的可采资源量分别为1679.82×10t和781.53×10t，表明四川盆地侏罗系致密储层石油具有较大的勘探潜力。
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