岩浆侵入作用影响碎屑围岩储层的研究进展与展望  

The Influence of Igneous Intrusion to Detrital Reservoir:Advances and Outlook

作　　者：刘超[1] 谢庆宾[1] 王贵文[1] 崔宇 张楚珺 

机构地区：[1]中国石油大学(北京)地球科学学院,北京102249 [2]中国石油大港油田勘探开发研究院,天津300270

出　　处：《地球科学进展》2015年第6期654-667,共14页Advances in Earth Science

基　　金：国家科学自然基金项目"辉绿岩热液作用对围岩储层影响的机理研究"(编号:41272162)资助

摘　　要：勘探实践表明,受岩浆侵入改造的变质泥岩能够成为良好的油气储层,同时岩浆侵入引发热对流和提供热液而影响砂岩围岩储层,因此探讨岩浆侵入对碎屑围岩的影响作用及其机理对于扩大油气勘探领域和储层评价具有重要意义。紧密围绕这一知识体系,概述了岩浆侵入影响沉积围岩的过程、侵入活动与油气储层的关系,归纳了国内外的主要研究进展,并从储层储集性能的角度,结合自身研究,总结了岩浆侵入作用对碎屑围岩储层的影响作用,主要表现为:1挤压变形作用。包括围岩宏观上发生塑性变形或脆性破裂、微观上碎屑颗粒脆性破裂和压溶作用。2热传递及热液变质作用。包括引发热对流使砂岩围岩改造、热烘烤引发泥岩热变质以及形成明显的变质构造。3直接或间接为成岩作用提供物质来源,产生溶蚀或沉淀。这些因素对储层储集性能具有双重作用。在此基础上,尝试探讨了今后的主要研究方向:热对流机理研究、侵入作用的影响范围,研究和建立不同侵入特征对围岩储层影响的机理并建立相应的模式。The practice of oil and gas exploration shows that the metamorphic mudstones（ slates and hornfels）can be profitable hydrocarbon plays when their petrophysical properties are transformed by igneous intrusion. Meanwhile,igneous intrusions surely effect sandstone country rocks by providing hydrothermal fluids and causing hydrothermal convection. It has great significance to explore the influencing factors and mechanism of intrusive body to country rocks as it is an important aspect to take account in reservoir evaluation and expanding hydrocarbon exploring regime. From this perspective,this paper generally summarizes the intruding and influencing process,the relationship between intrusive activities and hydrocarbon reservoirs,and the major study progresses. From standpoint of reservoir properties（ porosity and permeability） and author＇s case studies,the influencing factors of intrusion to country rocks are concluded as following aspects. They are： 1pressing deformation mechanism. This mechanism includes plastic deformation or brittle fracturing in macroscopy,detrital grain fracturing and pressure dissolution in microscopy; 2heat transferring and hydrothermal metamorphism. Sandstone country rocks are transformed by hydrothermal convection. Thermal metamorphism of mudstone occurs due to heat baking. Metamorphic geological structures are formed; 3intruding activities provide material sources for diagenesis directly and indirectly,causing dissolution or precipitation. These influencing factors have double effects on country rocks. On the basis of thorough discussion and conclusion above,further studies are proposed in this paper. Hydrothermal convection mechanism study,determining intrusion＇s influencing range,studying influencing mechanism of different intruding conditions and intrusion characteristics and establishing corresponding models are the main focus for further exploration of influencing mechanisms of igneous intrusions.

关 键 词：岩浆侵入作用 碎屑岩储层 变质作用 热对流 

分 类 号：P618.130.2[天文地球—矿床学]