致密砂岩储集空间多尺度表征——以松辽盆地齐家地区高台子油层为例

发布时间：2018-06-11 11:40

本文选题：纳米孔喉 + 微米孔喉　；参考：《石油与天然气地质》2016年06期

【摘要】：以松辽盆地齐家地区高台子油层三、四段致密砂岩储层为研究对象,利用纳米与微米CT、自动矿物识别系统(QEMSCAN)、MAPS图像拼接技术以及环境扫描电镜(ESEM)等非常规测试新技术,从宏观和微观两个尺度对齐家地区高台子致密储层空间进行表征。研究表明:1宏观尺度下,储层岩性主要以粉砂岩与泥质粉砂岩为主;层理构造多样,以块状层理、槽状交错层理、楔状层理和透镜状层理为主;砂泥间互特征明显,层理构造的多样性增强了致密储层的非均质性,块状层理最有利于致密油富集。2微观尺度下,孔隙具有微米-纳米连续分布的特征,微米孔隙峰值主要集中在2~3μm,纳米孔主体孔喉分布在200~300 nm。不同三维建模区域孔喉空间分布及连通性特征具有明显的微观非均质性;微观孔隙结构类型以粒间溶孔、粒内溶孔和微裂缝为主,孔隙度高值区对应有机酸高值区,存在较明显的耦合关系,受溶蚀作用控制显著。
[Abstract]:Taking the tight sandstone reservoir of the third and fourth member of Gaotaizi oil formation in Qijia area of Songliao Basin as the object of study, new unconventional testing techniques such as nanometer and micron CTT, automatic mineral recognition system (QEMSCANA / MAPS) image splicing technology and environmental scanning electron microscope (ESEM) are used. The tight reservoir space of Gaotaizi in Qijia area was characterized by macro and micro scale. The results show that the reservoir lithology is mainly composed of siltstone and argillaceous siltstone at the macro scale, the stratification structure is diverse, including block bedding, interlaced bedding, wedge-like bedding and lenticular bedding, and the interaction between sand and mud is obvious, the reservoir lithology is mainly composed of siltstone and argillaceous siltstone. The diversity of bedding structure enhances the heterogeneity of dense reservoir. Block bedding is most advantageous to the microcosmic scale of dense oil enrichment, and the pore has the characteristics of micron-nanometer continuous distribution. The peak value of micron pore is mainly 2 ~ 3 渭 m, and the main pore throat of nanometer pore is 200 ~ 300 nm. The spatial distribution and connectivity of pore throat in different 3D modeling areas have obvious microscopic heterogeneity, the micropore structure types are intergranular dissolved pore, intragranular dissolved pore and microfracture, and the high porosity region corresponds to the high value region of organic acid. There is an obvious coupling relationship, which is controlled by dissolution.
【作者单位】：东北石油大学地球科学学院;非常规油气成藏与开发省部共建国家重点实验室培育基地;中国石油新疆油田公司工程技术研究院;
【基金】：国家自然科学基金面上项目(41572132) 国家高技术研究发展计划(863计划)项目(2013AA064903) 黑龙江省自然科学基金项目(重点项目)(ZD2016007)
【分类号】：P618.13

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