一种考虑复杂孔隙结构的泥页岩地震岩石物理模型  

A mud shale seismic rock physics model considering complex pore structure

作　　者：王团[1] 赵海波[1] 李奎周[1] 甘立灯 霍秋立[1] WANG Tuan;ZHAO Haibo;LI Kuizhou;GAN Lideng;HUO Qiuli(Exploration and Development Research Institute of Daqing Oilfield Limited,Daqing 163712,China;Research Institute of Petroleum Exploration and Development,PetroChina,Beijing 100083,China)

机构地区：[1]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712 [2]中国石油勘探开发研究院,北京100083

出　　处：《中国石油大学学报（自然科学版）》2019年第3期45-55,共11页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：中国石油天然气股份公司重大科技专项(2016E-0201)

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&Toksoz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。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 & Toks z,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.

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” 

分 类 号：P631.4[天文地球—地质矿产勘探]