收稿日期: 2011-07-05
修回日期: 2011-08-17
网络出版日期: 2011-10-10
基金资助
国家重点基础研究发展规划（“973”）项目（编号：2011CB201104）资助.
Reservoir Characteristics of Xiaganchaigou Formation in Mabei Area of Northern Qaidam Basin
Received date: 2011-07-05
Revised date: 2011-08-17
Online published: 2011-10-10
陈吉, 谢梅, 史基安, 张永庶, 孙国强, 吴志雄, 王国仓 . 柴北缘马北地区下干柴沟组储层特征[J]. 天然气地球科学, 2011 , 22(5) : 821 -826 . DOI: 10.11764/j.issn.1672-1926.2011.05.821
Based on core observation,cast thin section,scanning electron microscopy and permeability analysis,we studied reservoir pore structure characteristics of the Xiaganchaigou Formation in northern Qaidam basin and analyzed reservoir development control factors.The results show that,the original intergranular pore is the main type of reservoir space of the Xiaganchaigou Formation,followed by the dissolution pores and small cracks.The reservoirs are comprehensively evaluated of medium porosity,small pore throat radius and medium penetration reservoirs.Sedimentary facies are the main control factors of reservoir performance;the conglomerate rock of braided river bed subphase in this district is the main reservoir rock.Diagenesis are also affected the reservoir performance,in which compaction and cementation decrease the porosity,dissolution increases secondary porosity.
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