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Reservoir materiality bounds from seismic inversion

机译:反演的储层重要性边界

摘要

A method including: obtaining geophysical data for a subsurface region; generating, with a computer, at least two subsurface property models of the subsurface region for at least two subsurface properties by performing an inversion that minimizes a misfit between the geophysical data and forward simulated data subject to one or more constraints, the inversion including generating updates to the at least two subsurface property models for at least two different scenarios that both fit the geophysical data with a same likelihood but have different values for model materiality, with the model materiality being posed as an equality constraint in the inversion, wherein the model materiality is a functional of model parameters that characterize hydrocarbon potential of the subsurface region; analyzing a geophysical data misfit curve or geophysical data misfit likelihood curve, over a predetermined range of values of the model materiality to identify the at least two subsurface property models that correspond to a high-side and low-side, respectively, for each of the at least two subsurface properties, with the high-side and low-side quantifying uncertainties in the subsurface properties; and prospecting for hydrocarbons in the subsurface region with the at least two models that correspond to the high-side and the low-side for each of the at least two subsurface properties.
机译:一种方法,包括:获得地下区域的地球物理数据;以及通过执行反演,以最小化地球物理数据和前向模拟数据在一个或多个约束条件下的失配,使用计算机为至少两个地下特性生成地下区域的至少两个地下特性模型,该反演包括生成更新至少两个不同场景的至少两个地下属性模型,它们都以相同的可能性拟合地球物理数据,但具有不同的模型重要性,其中模型重要性在反演中被视为等式约束,其中,模型重要性是表征地下区域油气潜力的模型参数的函数;在模型重要性的预定值范围内分析地球物理数据失配曲线或地球物理数据失配似然曲线,以识别至少两个分别对应于高边和低边的地下性质模型。至少两个地下属性,其中高端和低端量化了地下属性中的不确定性;并利用至少两个与至少两个地下性质中的每个性质对应的高压侧和低压侧的模型对地下区域的碳氢化合物进行勘探。

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