四川盆地简阳地区二叠系火山碎屑岩储层特征与成岩演化  被引量:2

Characteristics and diagenetic evolution of Permian pyroclastic reservoirs in Jianyang area,Sichuan Basin

在线阅读下载全文

作  者:张文播 李亚 杨田 彭思桥 蔡来星 任启强 ZHANG Wenbo;LI Ya;YANG Tian;PENG Siqiao;CAI Laixing;REN Qiqiang(Institute of Sedimentary Geology,Chengdu University of Technology,Chengdu 610059,China;Research Institute of Exploration and Development,PetroChina Southwest Oil&Gas Field Company,Chengdu 610041,China)

机构地区:[1]成都理工大学沉积地质研究院,成都610059 [2]中国石油西南油气田公司勘探开发研究院,成都610041

出  处:《岩性油气藏》2024年第2期136-146,共11页Lithologic Reservoirs

基  金:自然资源部沉积盆地与油气资源重点实验室开放基金(编号:cdcgs2020003)资助。

摘  要:火山碎屑岩油气藏作为重要的非常规油气藏,对油气增储上产具有重要的意义。通过岩心观察,综合薄片鉴定、QEMSCAN扫描、X射线衍射、物性分析、包裹体测温及碳氧同位素分析等资料,系统分析了四川盆地简阳地区二叠系火山碎屑岩储层特征及其成岩演化过程。研究结果表明:(1)简阳地区二叠系火山碎屑岩储层岩石类型主要包括火山角砾熔岩、凝灰熔岩和熔结火山角砾岩,整体物性都较好,孔隙度为0.78%~32.00%,平均为16.67%,渗透率为0.001~2.680 mD,平均为0.125 mD,属于高孔低渗储层,储集空间以次生孔隙和裂缝为主,包括脱玻化孔、基质溶蚀孔及溶蚀缝等类型。(2)研究区发育多种成岩作用,主要有熔结、压实、脱玻化、胶结及溶蚀作用等。(3)研究区经历了同生成岩、表生成岩与埋藏成岩3个阶段,成岩演化受深部热液、大气淡水及有机酸流体的共同影响,一方面流体活动造成热液矿物或碳酸盐胶结物的沉淀对储层物性起破坏性作用;另一方面热液流体促进油气运移,酸性流体的溶蚀改造作用对储层孔隙发育起建设性作用。As important unconventional reservoirs,pyroclastic reservoirs are of great significance for increasing oil and gas storage and production.Based on core observation,thin section identification,QEMSCAN scanning,X-ray diffraction,physical property analysis,inclusion temperature and carbon and oxygen isotope analysis,the characteristics and diagenetic evolution of Permian pyroclastic reservoirs in Jianyang area of Sichaun Basin were systematically analyzed.The results show that:(1)The rocks of Permian pyroclastic reservoirs in Jianyang area are mainly composed of volcanic breccia lava,tuff lava and melt-bonded volcanic breccia,with overall good physical properties,porosity ranging from 0.78%to 32.00%,average of 16.67%,permeability ranging from 0.001 to 2.680 mD,average of 0.125 mD,belonging to high porosity and low permeability reservoirs.The reservoir space is dominated by secondary pores and fractures,including devitrified pores,matrix dissolved pores and dissolved fractures.(2)Various diagenetic processes are developed in the study area,including fusion,compaction,devitrification,cementation and dissolution.(3)The study area experienced three diagenetic stages:syndiagenetic stage,epidiagenetic stage and burial diagenetic stage.The diagenetic evolution was influenced by deep hydrothermal fluids,atmospheric fresh water and organic acid fluids.On the one hand,fluid activities cause the precipitation of hydrothermal minerals or carbonate cements,which has a destructive effect on reservoir physical properties.On the other hand,hydrothermal fluids promote oil and gas migration,and the dissolution and transformation of acidic fluids play a constructive role in the development of reservoir pores.

关 键 词:火山碎屑岩储层 高孔低渗储层 深部热液流体 大气淡水 有机酸流体 二叠系 简阳地区 四川盆地 

分 类 号:TE122.2[石油与天然气工程—油气勘探] P618.13[天文地球—矿床学]

 

参考文献:

正在载入数据...

 

二级参考文献:

正在载入数据...

 

耦合文献:

正在载入数据...

 

引证文献:

正在载入数据...

 

二级引证文献:

正在载入数据...

 

同被引文献:

正在载入数据...

 

相关期刊文献:

正在载入数据...

相关的主题
相关的作者对象
相关的机构对象