岩性油气藏 ›› 2025, Vol. 37 ›› Issue (5): 49–58.doi: 10.12108/yxyqc.20250505

• 地质勘探 • 上一篇    

四川盆地德阳—安岳裂陷西侧震旦系灯四段储层特征及成藏主控因素

罗冰, 周刚, 马奎, 王文之, 徐少立, 武鲁亚, 王玥蕴, 张新   

  1. 中国石油西南油气田公司 勘探开发研究院, 成都 610041
  • 收稿日期:2025-04-09 修回日期:2025-04-14 发布日期:2025-09-06
  • 第一作者:罗冰（1982—），男，博士（后），高级工程师，主要从事油气地质综合研究和勘探部署工作。地址:（610041）四川省成都市高新区天府大道北段12号石油科技大厦。Email:lb2001@petrochina.com.cn。
  • 通信作者: 马奎（1988—），男，博士（后），高级工程师，主要从事海相碳酸盐岩油气成藏方面的研究工作。Email:mak@petrochina.com.cn。
  • 基金资助:
    国家自然科学基金“川西北地区早古生代多幕次构造转换与有机质富集-成藏研究”（编号：U2344209）与中国石油西南油气田公司科技项目“蓬莱气区震旦系灯影组天然气来源及成藏过程研究”（编号：20230301-25）联合资助。

Reservoir characteristics and main controlling factors for hydrocarbon accumulation of the fourth member of Sinian Dengying Formation in the west side of Deyang-Anyue Rift，Sichuan Basin

LUO Bing, ZHOU Gang, MA Kui, WANG Wenzhi, XU Shaoli, WU Luya, WANG Yueyun, ZHANG Xin   

  1. Research Institute of Petroleum Exploration and Development, Southwest Oil and Gas Field Company PetroChina, Chengdu 610041, China
  • Received:2025-04-09 Revised:2025-04-14 Published:2025-09-06

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摘要： 基于岩心观察、岩石薄片鉴定、测井资料分析和地震剖面解释，刻画了四川盆地德阳—安岳裂陷西侧震旦系灯影组四段的岩石学特征、沉积相展布、储层特征及源-储配置关系，明确了其成储、成藏主控因素。研究结果表明：①德阳—安岳裂陷西侧灯四段发育局限台地和台地边缘2种亚相，局限台地亚相可划分出丘滩、台坪和台洼3个微相，台地边缘亚相可划分出丘滩和滩间海2个微相。②研究区灯四段优质储层主要为丘滩微相的藻砂屑云岩、藻凝块云岩和藻叠层云岩。储集空间类型多样，可为孔隙型、溶洞孔洞型和裂缝型三大类，以格架孔、粒间溶孔、晶间孔、晶间溶孔和溶洞为主，储层经历了多期成岩改造，主要的破坏性成岩作用包括压实作用、胶结作用和充填作用，建设性成岩作用为多期溶蚀作用。③裂陷西侧灯四段成藏主控因素主要包括古裂陷控源、岩相岩溶控储、古隆起控油气聚集和晚期构造控圈闭。

关键词: 台地边缘, 丘滩, 藻云岩, 岩溶作用, 古裂陷, 古隆起, 灯四段, 震旦系, 德阳—安岳裂陷, 四川盆地

Abstract: Based on core observations of hand specimens，rock thin section identification，well logging data analysis，and seismic profile interpretation，the petrological characteristics，sedimentary facies distribution，reservoir characteristics，and source-reservoir configuration relationship of the fourth member of Sinian Dengying Formation in the west part of Deyang-Anyue Rift of Sichuan Basin were characterized，and the main controlling factors for reservoir formation and hydrocarbon accumulation were clarified. The results show that：（1）The fourth member of Dengying Formation in the west part of Deyang-Anyue Rift develop two subfacies：restricted platform and platform margin. The restricted platform subfacies can be further divided into three microfacies： mound-shoal，platform flat，and platform depression. The platform margin subfacies can be divided into two microfacies：mound-shoal and inter-shoal sea.（2）High-quality reservoirs of the fourth member of Dengying Formation are mainly composed of the algal grainstone，algal-clotted dolomite，and algal-laminated dolomite in the mound-shoal microfacies. The types of reservoir spaces are diverse，such as pore type，karst cave-pore type，and fracture type，mainly consisting of framework pores，intergranular dissolution pores，intercrystalline pores，intercrystalline dissolution pores，and karst cave. The reservoirs of the fourth member have undergone multistage diagenetic modification，the main destructive diagenetic processes include compaction，cementation，and filling， while the constructive diagenetic process is multiphase dissolution.（3）The main controlling factors for hydrocarbon accumulation in the fourth member of Dengying Formation in the west side of the rift mainly are paleo-rift control on source rocks，lithofacies and karst control on reservoir quality，paleo-uplift control on hydrocarbon accumulation，and late-stage structural control on traps.

Key words: platform margin, mound-shoal, algal-clotted dolomite, karstification, paleo-rift, paleo-uplift, the fourth member of Dengying Formation, Sinian, Deyang-Anyue Rift, Sichuan Basin

中图分类号: 

  • TE122
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