| Diagenetic Reactions in Reservoir Strata and Geochemical Properties of Pore Fluid and Its Origin in Songlian Basin |
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| 作者姓名： | 楼章华 蔡希源 |
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| 作者单位： | [1]DepartmentofEarthSciences,ZhejiangUniversity,Hangzhou310027 [2]DaqingInstituteofExplorationandDevelopmen,ZhejiangUniversity,Hangzhou310027 |
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| 摘 要： | The reservoirs of the SOngliao Basin are composed of typical unstable sandstones,with high percentages of volcanic fragments and feldspar,In the course of sedimentation and burying,a series of physical and chemical reactions took place between minerals and pore water and water-rock reactions and ion exchange caused changes in ion assemblage of pore water,Hydration-hydrolysis,dissolution and the albitization of feldspar made many ions free from their framework and inter into the pore water,and induced the precipitation of a large amount of authigenic minerals such as smectite and chlorite,During the diagenesis of sandstone.diagenetic reactions involved several stages with increasing depth,and so did the precipitation of authigenic minerals and the transformaiton of minerals.The migration of ions is related with the precipitation,transformation and dissolution of authigenic minerals.Thus,to deepen our study on sandstone diagenesis is an important link for the analysis of ion migration in the evolution of pore water ,the origin and evolution of pore water could be tracked in terms of the geochemistry of fluid inclusions in authigenic minerals.And the isotopic composition of the authigenic mineral calcite can provide its genetic information.
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| 关 键 词： | 同位素 方解石 成岩作用 水库 孔隙水 地球化学 地层 松辽盆地 |
Diagenetic reactions in reservoir strata and geochemical properties of pore fluid and its origin in Songliao Basin |
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| Lou Zhanghua,Han Xiqiu,Cai Xiyuan.Diagenetic Reactions in Reservoir Strata and Geochemical Properties of Pore Fluid and Its Origin in Songlian Basin[J].Chinese Journal of Geochemistry,1998,17(4):346-355. |
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| Authors: | Lou Zhanghua Han Xiqiu Cai Xiyuan |
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| Institution: | (1) Department of Earth Sciences, Zhejiang University, 310027 Hangzhou;(2) Daqing Institute of Exploration and Development, 163712 Daqing |
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| Abstract: | The reservoirs of the Songliao Basin are composed of typical unstable sandstones, with high percentages of volcanic fragments
and feldspar. In the course of sedimentation and burying, a series of physical and chemical reactions took place between minerals
and pore water and water-rock reactions and ion exchange caused changes in ion assemblage of pore water. Hydration-hydrolysis,
dissolution and the albitization of feldspar made many ions free from their framework and inter into the pore water, and induced
the precipitation of a large amount of authigenic minerals such as smectite and chlorite. During the diagenesis of sandstone,
diagenetic reactions involved several stages with increasing depth, and so did the precipitation of authigenic minerals and
the transformation of minerals. The migration of ions is related with the precipitation, transformation and dissolution of
authigenic minerals. Thus, to deepen our study on sandstone diagenesis is an important link for the analysis of ion migration
in the evolution of pore water. The origin and evolution of pore water could be tracked in terms of the geochemistry of fluid
inclusions in authigenic minerals. And the isotopic composition of the authigenic mineral calcite can provide its genetic
information. |
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| Keywords: | diagenesis pore water migration of ions |
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