首页|四川盆地灯影组多类型流体多期次改造作用下孔隙度演化的定量研究

四川盆地灯影组多类型流体多期次改造作用下孔隙度演化的定量研究

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  • 国家科技期刊平台
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选取四川盆地灯影组四段(灯四段)地层,在传统地质研究的基础上,引入多组分、多相态、温度—流体—化学多场耦合的反应溶质运移模拟技术,基于物质平衡和能量守恒原理,深入探究深层碳酸盐岩储层成岩过程中多类型流体与岩石相互作用的机制,分析计算多期次流体对储层孔隙的叠加改造,定量恢复地质时间尺度的孔隙度演化史.结果表明:灯四段地层受到大气淡水、海水、有机酸和热液 4 种流体多达 6 期改造影响,控制孔隙度的主要成岩作用为溶蚀作用、白云石化作用与胶结作用,矿物间以方解石—镁方解石—白云石之间的转化为主;不同类型的流体对储层的改造差异较大,充足的大气淡水为建设性流体,而海水、有机酸和热液均为建设性—破坏性共存的流体;多期次流体对储层的改造有叠加效应,储层最终的物性条件取决于多期次流体的综合改造,同时流体改造的顺序对储层孔隙度的演变影响也极大.
Quantitative study on porosity evolution under multi-stage reformation of multi-type fluids in Dengying Formation,Sichuan Basin
In this study,the fourth member of Dengying Formation in Sichuan Basin was examined.On the basis of traditional petrological testing,the reactive solute transport simulation technology was utilized to calculate the superposition and transfor-mation of reservoir pores due to multi-stage fluids and quantitatively restore the porosity evolution history.Results indicate that the reservoir experienced influences from atmospheric freshwater,seawater,organic acid,and hydrothermal fluid.The primary diagenetic processes controlling porosity were dissolution,dolomite formation and cementation,with transformed min-erals primarily comprising calcite,magnesium calcite,and dolomite.Different fluid types exhibited varying effects on reservoir reconstruction.Adequate atmospheric fresh water acted as a constructive fluid,while seawater,organic acids,and hydrother-mal fluids had both constructive and destructive impacts.Multi-stage fluids contributed to a superimposed effect on the reser-voir transformation,with the ultimate physical conditions of the reservoir contingent upon the comprehensive transformation of these fluids.Notably,the sequence of fluid modification significantly influenced the evolution of reservoir porosity.Simutane-ously,the sequence of fluid transformation played a pivotal role in shaping the evolution of reservoir porosity.

deep carbonate reservoirmulti-type fluidssuperimposed transformationporosity evolutiondiagenesis simulation

杨磊磊、魏国、于志超、鲁雪松、周慧、王珊、李昌伟

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中国石油大学(北京)油气资源与工程全国重点实验室,北京 102249

国家能源致密油气研发中心,北京 100083

中国石油大学(北京)非常规油气科学技术研究院,北京 102249

中国石油勘探开发研究院,北京 100083

中国石油西南油气田勘探开发研究院,四川成都 610041

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深层碳酸盐岩储层 多类型流体 叠加改造 孔隙度演化 成岩作用数值模拟

中国石油重点实验室开放基金国家自然科学基金中国石油大学(北京)人才基金中国石油科技重大专项

2023-KFKT-08423721432462023BJRC0302023ZZ02

2024

10.3969/j.issn.1673-5005.2024.03.002

中国石油大学学报(自然科学版)
中国石油大学

中国石油大学学报(自然科学版)

CSTPCD北大核心
影响因子：1.169
ISSN：1673-5005
年,卷(期)：2024.48(3)
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