APPLICATION OF SEQUENCE STRATIGRAPHY TO THE STUDY OF DIAGENESIS OF SILICICLASTIC ROCK—Take the Lower Tertiary of Ya13-1 gas field as an example
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摘要: 本文采用层序中体系域的沉积过程分析与成岩作用分析相结合的方法,以琼东南盆地崖13-1气田的单井剖面综合研究为基础,结合连井地震剖面的层序解释,以三级层序中储集体形成的背景环境和原生孔隙水化学性质-成岩环境为单元,系统分析了不同体系域沉积和成岩标志,总结出了崖13-1气田下第三系崖城组和陵水组的成岩域模式,探讨了沉积体系域构成与成岩作用的制约关系及其对砂岩储层储集性的影响。Abstract: On the basis of comprehensive study of the single well section and the sequence analysis of the link-well seismic cross-section in Ya13-1 gas field in QDN basin,South China Sea,this paper analyzed the sedimentary and diagenetic marks of various system tracts by combining the sedimentary process analysis and the diagenesis analysis of the system tracts in the sequence.On the unit of the third-class sequence diagenetic environment,including reservoir-forming backgroud surroundings and the origin water chemistry of the reservoir,it summed up the diagenetic unit model of the lower Tertiary Yacheng Fm and Lingshui Fm which are comparable to the system tracts.It also inquired into the interact relation between the sedimentary system tracts and the diagenesis and its influences on the sandstones reservoirs.
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Key words:
- diagenesis /
- sequence stratigraphy /
- system tracts /
- QDN basin
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