鄂尔多斯盆地东南缘延长组成岩作用及储层物性特征  

Diagenesis and physical property of the Yanchang Formation sandstone reservoirs in southeastern Ordos Basin

作　　者：田亚铭[1] 施泽进[1] 王长城[1] 宋江海[2] 王勇[1] 汪见辉[1] 

机构地区：[1]成都理工大学"油气藏地质及开发工程"国家重点实验室,四川成都610059 [2]长庆油田公司勘探研究院,陕西西安710021

出　　处：《沉积与特提斯地质》2009年第4期47-51,共5页Sedimentary Geology and Tethyan Geology

摘　　要：通过成岩作用及储层物性的综合分析，该区主要油层组长9、长8、长6及长2的岩石成分成熟度和结构成熟度均较差，均经历了晚成岩A期。压实作用降低了储层的孔隙度，致密的碳酸盐岩胶结降低了孔隙度并阻止了次生孔隙的产生。该区储层为低孔低渗储层，孔隙度在4％-8％之间，渗透率多小于0．1×10^-3μm2。The combination of petrology, diagenesis and physical property of the Yanchang Formation sandstone reservoirs in southeastern Ordos Basin has revealed that the Chang-9, Chang-8, Chang-6 and Chang-2 oil reservoirs consist dominantly of feldspathic litharenite, lithic feldspathic sandstone and feldspathic sandstone with poor compositional and textural maturity, The decrease of the porosity by compaction and carbonate cementation resulted in the generation of the low-porosity and low-permeability sandstone reservoirs in the study area. The porosity tends to range between 4% and 8%, and the permeability is generally less than0.1×10^-3μm2. The Chang-6 oil reservoirs are the best sandstone reservoirs with good porosity and permeability, and the Wang-9 well is believed to be the favourable sedimentary facies zone due to better physical properties of the sandstone reservoirs.

关 键 词：鄂尔多斯盆地 延长组 成岩作用 孔隙演化 物性特征 

分 类 号：TE122.23[石油与天然气工程—油气勘探]