白垩系洛河组巨厚砂岩含水层精细划分研究现状与展望

Research Status and Prospects of Fine Subdivision of the Giant-Thick Sandstone Aquifer in the Cretaceous Luohe Formation

摘要: 针对鄂尔多斯盆地洛河组巨厚含水层垂向非均质性强、传统评价精度不足的问题，本文系统综述了其精细划分的研究现状与工程应用。首先，梳理了包含岩石微观测试、水文地球物理测井(流量与盐化测井)、双Packer分层抽水及水化学测试在内的精细探测技术体系。其次，重点阐述了基于多源信息融合的“综合富水性指数”评价模型，该模型通过量化地层岩性、厚度及孔隙度指标，定量揭示了洛河组“上、下段弱富水，中段强富水”的垂向分带规律。最后，论证了洛河组下段作为天然“水力屏障”在限制导水裂隙发育、实现保水采煤中的工程价值，并对未来评价技术进行了展望。

Abstract: Addressing the challenges of strong vertical heterogeneity and insufficient accuracy in traditional evaluation of the giant-thick aquifer of the Luohe Formation in the Ordos Basin, this paper systematically reviews the research status and engineering applications of its fine subdivision. First, a fine detection technology system is summarized, comprising rock microscopic testing, hydrogeophysical logging (specifically flow and salinization logging), double Packer staged pumping tests, and hydrochemical testing. Second, the study focuses on the “Comprehensive Water-Richness Index” evaluation model based on multi-source information fusion. By quantifying indices of stratigraphic lithology, thickness, and porosity, this model quantitatively reveals the vertical zonation pattern of the Luohe Formation, characterized by “weak water-richness in the upper and lower sections, and strong water-richness in the middle section”. Finally, the engineering value of the lower section of the Luohe Formation acting as a natural “hydraulic barrier” in restricting the development of water-conducting fractures and achieving water-conserving coal mining is demonstrated, followed by an outlook on future evaluation technologies.