辽河坳陷大民屯凹陷沙四段页岩油层矿物组分含量反演方法及应用

发布时间：2019-03-17 09:59

【摘要】：准确刻画泥页岩中矿物含量是页岩油层脆性评价的关键。泥页岩富含有机质、矿物组分复杂,传统全体积模型解释方法的精度较低。以渤海湾盆地辽河坳陷大民屯凹陷沙四段页岩油为例,根据全岩及地化测试资料,剖析该区泥页岩的岩性、矿物组成及曲线响应特征,构建适用于泥页岩的体积模型及曲线响应方程;采用基于遗传算法的最优化方法对页岩油层进行处理,得到地层的矿物组分含量、孔隙度及干酪根含量等参数。实际处理结果表明,多矿物反演预测的矿物变化趋势与ECS(元素俘获测井)结果一致,其精度明显高于线性拟合。从含油性及可压裂性的角度建立页岩油甜点标准,利用多矿物解释成果有效指导了页岩油甜点层位的优选。
[Abstract]:It is the key to evaluate the brittleness of shale reservoir to accurately characterize the mineral content in shale. Shale is rich in organic matter and its mineral composition is complex. The precision of traditional whole-volume model interpretation method is low. Taking shale oil of Sha4 member of Damintun depression, Liaohe depression, Bohai Bay basin as an example, the lithology, mineral composition and curve response characteristics of shale in this area are analyzed on the basis of whole rock and geochemical test data. The volume model and curve response equation suitable for shale are constructed. The optimization method based on genetic algorithm is used to deal with shale oil layer, and the parameters such as mineral composition, porosity and kerogen content are obtained. The results of practical processing show that the trend of mineral variation predicted by multi-mineral inversion is consistent with that of ECS (element capture logging), and its accuracy is obviously higher than that of linear fitting. The criteria of shale oil desserts are established from the point of view of oil content and fracturing property. The optimum location of shale oil desserts is effectively guided by the results of multi-mineral interpretation.
【作者单位】：中国石油大学(华东)非常规油气与新能源研究院;成都理工大学油气藏地质与开发工程国家重点实验室;
【基金】：高校自主创新科研计划项目(13CX05013A) 山东省优秀中青年科学家科研奖励基金项目(2014BSE28018)
【分类号】：P618.13

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