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四川盆地元坝-阆中地区下侏罗统千佛崖组成为近两年的勘探开发热点，部分井相继获得较好的油气产能，证实了元坝-阆中地区下侏罗统千佛崖组具有良好的资源潜力。基于LY1等页岩油探井的测录井、岩心、实验、测试等资料，对其页岩油气地质工程参数、有利岩相、双甜点评价三方面进行了综合研究。研究结果表明：1)元坝-阆中地区千二段土含量普遍偏高，属低孔低渗塑性地层；泥页岩有机碳含量高于粉砂岩、细砂岩，以Ⅱ1-Ⅲ型干酪根为主；泥页岩储层微裂缝发育，具有相对好的流通性。2)基于有机质含量+沉积构造+矿物组分岩相划分方案，明确富有机质纹层状土质页岩等6种岩相为有利岩相，是获得较好产能的基础；且大部分井以产油为主，气油比低。3)通过生产实践，形成的双甜点评价技术提供的成果参数丰富，能有效指导后续水平井钻井和压裂施工。
Abstract：The Lower Jurassic Qianfoya Formation in the Yuanba-Langzhong area of the Sichuan Basin has become a hotspot for exploration and development in recent years. Several wells have successively achieved promising oil and gas productivity, confirming the strong resource potential of the Qianfoya Formation in this region. Based on data from shale oil exploration wells such as LY1, including logging, coring, laboratory experiments, and testing, a comprehensive study was conducted on three aspects: geological and engineering parameters of shale oil and gas, favorable lithofacies, and dual-sweet spot evaluation. The research results indicate that: 1)the Qian-2 Member in the Yuanba-Langzhong area generally exhibits high clay content, belonging to a low-porosity, low-permeability plastic formation. The organic carbon content of mud shale is higher than that of siltstone and fine sandstone, with kerogen types mainly Ⅱ1-Ⅲ. The shale reservoir is well-developed with microfractures, providing relatively good fluid mobility. 2)Based on the lithofacies classification scheme integrating organic matter content, sedimentary structure, and mineral composition, six lithofacies-including organic-rich laminated clayey shale-are identified as favorable lithofacies, serving as the foundation for achieving better productivity. Most wells are oil-dominated, with a low gas-oil ratio. 3)Through production practices, the developed dual-sweet spot evaluation technology provides abundant results and useful parameters outputs, effectively guiding subsequent horizontal well drilling and fracturing operations.
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基本信息:
中图分类号:TE142
引用信息:
[1]李孟来.元坝-阆中地区千佛崖组页岩油测录井研究及应用[J].工程地球物理学报,2026,23(01):85-93.
基金信息:
中石化经纬有限公司科技攻关项目(编号：JWKT2211)
2026-01-30
2026-01-30