须三段及须五段储层特征研究:以四川盆地南部X区块为例
Reservoir Characteristics of Third and Fifth Members of Xujiahe Formation:A Case Study of Block X in Southern Sichuan Basin
尹乾好 1吴月 1赵书伟 1邢亚冰 1张燚 1毛红平1
作者信息
- 1. 重庆科技学院石油与天然气工程学院,重庆 401331
- 折叠
摘要
四川盆地南部X区块须家河组须三段、须五段烃源岩厚度大,沉积微相以水下分流河道、浅湖泥和席状砂为主,勘探开发潜力大.综合利用铸体薄片镜下观察、扫描电镜、物性分析等资料,对四川盆地南部X区块须家河组的储层特征进行了研究.研究结果表明:研究区须三段砂岩类型主要为岩屑长石砂岩和亚长石砂岩,须五段砂岩类型主要为长石岩屑砂岩;须家河组储层孔隙类型主要为粒内溶孔、粒间溶孔和裂缝;须三段平均孔隙度为 1.36%,平均渗透率为 1.87 mD,须五段平均孔隙度为 2.59%,平均渗透率为 0.15 mD,须三段、须五段为典型的低孔低渗致密砂岩储层.
Abstract
The thickness of hydrocarbon source rocks in the the third and fifth members of Xujiahe Formation of block X in the southern Sichuan Basin is large,and the sedimentary microfacies are mainly composed of underwater distributary channels,shallow lake mud and sheet sand,with great exploration and development potential.The reservoir characteristics of the Xujiahe Formation of block X in the southern Sichuan Basin were studied by comprehensively utilizing data such as casting thin section observation,scanning electron microscopy and physical property analysis.The research results indicate that in the studied area,the sandstone types in the third member of the Xujiahe Formation are mainly lithic feldspathic sandstone and sub feldspathic sandstone,while the sandstone types in the fifth member of the Xujiahe Formation are mainly feldspathic lithic sandstone;the pore types of the Xujiahe Formation reservoir are mainly intergranular dissolved pores,intergranular dissolved pores and fractures;the average pore size of the third member of the Xujiahe Formation is 1.36%,and the average permeability is 1.87 mD;the average pore size of the fifth member of the Xujiahe Formation is 2.59%,and the average permeability is 0.15 mD;the third and fifth members of Xujiahe Formation are typical low porosity and low permeability tight sandstone reservoirs.
关键词
四川盆地南部/须家河组/孔隙类型/储层特征Key words
southern Sichuan Basin/the Xujiahe Formation/pore type/reservoir characteristics引用本文复制引用
基金项目
重庆科技学院硕士研究生创新计划(YKJCX2220110)
出版年
2024
NETL
NSTL
维普
万方数据