| 摘要: |
| 针对松辽盆地北部古龙凹陷青山口组陆相泥页岩岩石学特征及微观结构特征,综合利用Kuster ＆ Toksz模型、自相容模型、双连通孔隙模型及线性滑动模型,建立一种适用于富有机质泥页岩的复杂孔隙结构岩石物理模型。基于提出的模型,讨论有机质体积分数、裂缝孔隙度、基质孔隙度、孔隙纵横比和孔隙连通系数等5种因素对岩石弹性性质的影响。通过对比分析,优选出对有机质、孔隙度敏感的弹性参数λρ和μρ,并建立地震岩石物理交会模板。实际资料结果表明,提出的模型具有很好的预测性,该模型可用于古龙凹陷青山口组陆相泥页岩储层评价及地震“甜点”识别。 |
| 关键词: 陆相泥页岩 岩石物理模型 复杂孔隙结构 岩石物理交会模板 地震“甜点” |
| DOI：10.3969/j.issn.1673-5005.2019.03.005 |
| 分类号::P 631.4 |
| 文献标识码:A |
| 基金项目:中国石油天然气股份公司重大科技专项(2016E-0201) |
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| A mud shale seismic rock physics model considering complex pore structure |
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WANG Tuan1, ZHAO Haibo1, LI Kuizhou1, GAN Lideng2, HUO Qiuli1
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(1. Exploration and Development Research Institute of Daqing Oilfield Limited, Daqing 163712, China;2.Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China)
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| Abstract: |
| Based on the petrological and microtexture characters of continental shales of Qingshankou Formation in Gulong Sag, northern Songliao Basin, a combined modeling technique, including Kuster & Toksz, self consistent, double-porosity and linear slippage modeling, is used to propose a complex pore structure rock physics model for the organic-rich shale. Based on the modeling results, the influence factors, the organic volume fraction, the fracture porosity, the matrix porosity, the pore aspect ratio and the pore connectivity coefficient on the rock elastic properties are discussed. In addition, the sensitive parameters, which are sensitive to the change of organic content and total porosity, are optimized, and a rock physics crossing template for continental shales is established. Actual data have shown that the proposed model has good predictability, which can be used in the reservoir evaluation and seismic "sweet spot" for continental shale reservoir of Qingshankou Formation in Gulong Sag. |
| Key words: continental shale rock physics model complex pore structure rock physics cross plot template seismic "sweet spot" |
