天然气工业2026，Vol.46Issue(4)：15-30,16.DOI:10.3787/j.issn.1000-0976.2026.04.002
四川盆地绵阳—广安浅水陆棚周缘上二叠统长兴组储层特征及主控因素
Characteristics and main controlling factors of Upper Permian Changxing Formation reservoirs in the periphery of Mianyang-Guang'an shallow continental shelf in the Sichuan Basin
摘要
Abstract
In recent years,significant breakthroughs have been achieved in the exploration of the Upper Permian Changxing Formation deep limestone reservoirs on the Mianyang-Guang'an shallow continental shelf in the Sichuan Basin,highlighting the immense natural gas exploration and development potential of this formation.However,the genesis and main controlling factors of high-quality reservoir development in this area are rarely studied,which restricts the exploration and development process.Based on the core,thin section and SEMobservations,and the cathodoluminescence and fluid inclusion analysis of key exploration wells,this paper clarifies the lithology,physical properties,sedimentary facies and storage space characteristics of the Changxing Formation reservoirs,and then analyzes the key diagenesis in the formation of the reservoirs and the pore evolution mechanisms.Additionally,the main factors controlling the development of deep high-quality limestone reservoirs in the Changxing Formation are identified based on the sedimentary facies-diagenesis-hydrocarbon generation coupling relationships.The following results are obtained.First,the Changxing Formation reservoirs are primaril developed in the pinnacle reef subfacies of shallow continental shelf and the bioclastic beach and biogenic reef subfacies of marginal platform,and lithologically dominated by bioclastic and biogenic reef limestones.Second,the storage space is characterized by secondary pores including intergranular dissolved pores,biogenic cavity dissolved pores,moldic pores,intercrystalline pores,and intercrystalline dissolved pores.Third,deep high-quality limestone reservoirs exhibit favorable physical properties,with moderate porosity(avg.12.21％)and moderate permeability(avg.5.15 mD),and their development takes dissolution the key diagenetic process.In conclusion,the high-quality limestone reservoirs of Changxing Formation in the Mianyang-Guang'an shallow continental shelf are under the joint control of three factors,with sedimentary facies belt laying the sediment foundation for reservoir development,diagenetic alteration controlling pore evolution,and hydrocarbon generation-diagenesis coupling and abnormal pressure ensuring pore preservation.The findings improve the theories on the development of deep carbonate porous reservoirs,and can provide important basis for regional oil and gas exploration.关键词
四川盆地/绵阳—广安浅水陆棚/长兴组/深层石灰岩储层/沉积相/储集空间/主控因素Key words
Sichuan Basin/Mianyang-Guang'an shallow continental shelf/Changxing Formation/Deep limestone reservoir/Sedimentary facies/Storage space/Main controlling factor分类
能源科技引用本文复制引用
张本健,任纪博,金世贵,李焱燚,宋泽章,Mikhail SPASENNYKH,Tagir KARAMOV,明盈,孙豪飞,黄荟文,徐亮,陈骁,张文杰,徐唱,王嘉先..四川盆地绵阳—广安浅水陆棚周缘上二叠统长兴组储层特征及主控因素[J].天然气工业,2026,46(4):15-30,16.基金项目
国家自然科学基金面上项目"深层、超深层热液活动及其对古油藏改造效应定量表征"(编号:42272161)、中国石油天然气股份有限公司重大科技专项项目"海相碳酸盐岩油气规模增储上产与勘探开发技术研究"(编号:2023ZZ16). （编号:42272161）
