陈桂菊,姜在兴,田继军,李熙喆,张满郎
CHEN Gui-ju1,JIANG Zai-xing1,TIAN Ji-jun2,LI Xi-zhe3,ZHANG Man-lang3 (1.Resource Institute of China University of Geosciences

• 1:中国地质大学能源学院
• 2:中国地质大学能源学院
• 3:中国科学院广州地球化学研究所
• 4:石油勘探开发研究院廊坊分院

摘要(Abstract)：

磨溪气田上三叠统香二、香四段储层压实、胶结、溶蚀、破裂成岩相发育,早期碳酸盐缺乏,晚期碳酸盐局部充填。储层属低孔低渗、裂缝-孔隙型砂岩储层,是该区的主力气层。不稳定矿物的溶蚀是次生孔隙的主要来源,稳定矿物石英的溶蚀使次生孔隙锦上添花;安县运动及喜山期的流体跨层流动对形成良好储层具有重要作用。夹持于龙门山推覆构造带、米仓山—大巴山推覆构造带之间的磨溪气田,形成了两个邻近应力剪切带,加上古残丘的影响,造成了香二、香四段储层裂缝的发育,使储层的储集性能得到改善。
Sandstone reservoirs of second and forth members of Upper Triassic Xiangxi Formation are characterized by compaction,cementation,corrosion and fracturing,lacking of carbonate cementation in early stage and local carbonate filling in late stage.The reservoirs are low porosity,low permeability,and fracture-porosity sandstone reservoirs,which are main gas reservoirs of this area.Corrosion of unstable mineral is the main source of secondary pores,and corrosion of stable mineral quartz improves secondary pores.Anxian movement and cross-formational flow in Himalayan stage are important factors to form good sandstone reservoirs.With effect of Longmenshan nappe structure in the west and Micangshan-Dabashan nappe structure in northeast,two adjacent stress shearing belts form in Moxi Gas Field.Sandstone reservoirs of Second and Forth Members of Upper Triassic Xiangxi Formation are improved by development of fractures which are influenced by shearing belts and paleo-hammock.

关键词(KeyWords)： 磨溪气田;低孔低渗;跨层流动;古残丘;裂缝
Moxi Gas Field;low porosity and low permeability;cross-formational migration;paleo-hammock;fracture

Abstract:

Keywords:

基金项目(Foundation): 国家“十五”科技攻关计划课题(2004BA616A)部分研究成果

作者(Author): 陈桂菊,姜在兴,田继军,李熙喆,张满郎
CHEN Gui-ju1,JIANG Zai-xing1,TIAN Ji-jun2,LI Xi-zhe3,ZHANG Man-lang3 (1.Resource Institute of China University of Geosciences

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