神木-双山气田山西组2段储层成岩作用与孔隙演化  

Diagenesis and pore evolution of shan 2 reservoir of Shenmu-Shuangshan gas field

作　　者：仲伟祥 陈龙 李旭芳 杨飞[3] 赵茜[4] 

机构地区：[1]西安石油大学石油工程学院,陕西西安710065 [2]中国石油东方地球物理公司,河北涿州072750 [3]中原油田采油三厂,河南濮阳457001 [4]西安石油大学地球科学与工程学院,陕西西安710065

出　　处：《石油化工应用》2013年第12期51-54,共4页Petrochemical Industry Application

基　　金：陕西省工业攻关计划项目;项目编号:2012K08-07;西安市技术转移促进工程项目;项目编号:CX12184-6

摘　　要：为揭示不同成岩作用与孔隙演化之间的变化关系,以物性、铸体薄片、X衍射、包裹体等实验结果为基础,对神木-双山气田山西组储层的成岩作用与孔隙演化特征进行了研究。结果表明,研究区山2段储层岩性主要为中-粗粒岩屑砂岩颗粒以次圆为主,少量圆及次棱角状。粒度相对较细,除底部和局部含有粒状砂岩或中-粗砂岩外,一般为细-中粒或粉-细粒以及粉砂。结构成熟度较低,成分成熟度高。主要经历的成岩作用有压实压溶作用、胶结作用和溶蚀作用,研究区成岩作用己进入晚成岩阶段"B"期。孔隙演化结果分析表明,山2段初始孔隙度为35.37%,早期机械压实与压溶作用损失了13.92%的孔隙度,胶结作用造成18.75%的孔隙度损失,后期溶蚀作用贡献了4.82%的孔隙度。不同的成岩作用对砂岩孔隙的共同影响造成了研究区现在低孔、低渗的特点。In order to reveal the relationship between different diagenesis and pore evolution, the characteristics of diagenesis and pore evolution of Shan 2 reservoir in Shenmu-shuang- shan gas field were studied based on the laboratory results of physical property,east section, X-ray diffraction and inclusions.The result shows that the lithology of Shanxi reservoir is mainly coarse sandstone,middle to coarse quartz sandstone and lithic sandstone,a small circle and angular.Relatively fine granularity,in addition to the bottom and partial containing granular in sandstone or - grit,is usually fine,granule or powder,granule and powder sand.high compositional maturity and low textural maturity.Compaction, pressure solution,cementation and dissolution are the main diagenesis.The diagenesis in this area has entered into the B period of late diagenetic stage.The analysis of pore evolution model shows that the initial porosity is 35.37 %,13.92 % porosity is lost due to the early stage compaction, the cementation at early and late stage causes 18.75 % porosity to loss,but the dissolution at late stage adds 4.82 % porosity.The different diagenesis has common effect on porosity,which leads to the characteristics of low porosity and low permeability in studied area.

关 键 词：孔隙演化 成岩作用 低渗砂岩气藏 

分 类 号：TE122.2[石油与天然气工程—油气勘探]