准南斜坡带砂岩储层孔隙演化特征与有利储层评价:基于成岩物理模拟实验研究  

Reservoir Porosity Evolution Characteristics and Evaluation of the Slope Belt in the Southern Margin of the Junggar Basin:Insight from Diagenesis Modeling Experiments

作　　者：冯佳睿[1,2] 高志勇[1,2] 崔京钢[1,2] 郭美丽[3] 

机构地区：[1]中国石油勘探开发研究院石油地质实验研究中心,北京100083 [2]中国石油勘探开发研究院提高石油采收率国家重点实验室,北京100083 [3]中国地质大学地球科学与资源学院,北京100083

出　　处：《地质科技情报》2014年第5期134-140,148,共8页Geological Science and Technology Information

基　　金：国家科技重大专项(2011ZX05003-002);中国石油天然气股份有限公司科学研究与技术开发项目(2011B-0402)

摘　　要：通过自主研发的成岩物理模拟系统,对准噶尔盆地南缘斜坡带侏罗系细砂岩进行了成岩物理模拟实验,对前陆盆地特有的埋藏方式,即沉积早期长期浅埋,沉积晚期快速深埋影响下的储层物性特征、孔隙演化规律等进行了研究。结果表明,随着模拟温度、压力和模拟埋深的逐渐增大以及压实作用的不断加强,细砂岩颗粒间接触关系由点-线-凹凸接触,粒内裂纹逐渐出现,裂纹呈不规则分布或呈共轭剪切关系;模拟埋深2 000～3 000m时次生孔隙较为发育,孔径和喉径也表现出快速增大的趋势,埋深大于4 000m后,次生孔隙与孔径、喉径均开始呈现递减趋势。因此,推测埋深2 000～3 000m是准南斜坡带侏罗系有利储层发育的关键层位。Using an independently developed diagenetic physical modeling system, we conducted a series of diagenesis physical modeling experiments to simulate reservoir physical property and porosity evolution of the Jurassic fine sandstone in the southern margin of the Junggar Basin. These experiments simulated early, long-term, shallow burial, subsequent rapid and deep burial sequences, reproducing the process of rap- id Vertical compaction of deep reservoirs during the unique burial mode of the foreland basin. As gradually increasing simulated temperature, pressure, depth and the continuously strengthening of the compaction, the contact relationship between particles of fine sandstone became increasingly close, and intragranular ir- regular or conjugated cracks appeared gradually. Secondary pores were relatively developed at the depth of 2 000--3 000 m, pore diameter and throat diameter also increased quickly. While at the buried depth of more than 4 000 m, secondary porosity, pore diameter and throat diameter were all present in a decreasing trend. Therefore, reservoir pores and pore throats show a significant increase at a burial depth of 2 000-3 000 m, and are characteristics of the most favorable reservoirs in the slope belt of the southern margin of the Junggar Basin.

关 键 词：前陆盆地 准噶尔盆地南缘 斜坡带 成岩物理模拟 成岩作用 储层物性 

分 类 号：TE122.23[石油与天然气工程—油气勘探]