四川盆地川西坳陷龙门山前雷口坡组四段气藏层序划分及储层发育控制因素

发布时间：2018-03-14 20:04

本文选题：层序地层　切入点：储层分布　出处：《石油与天然气地质》2017年04期 　论文类型：期刊论文

【摘要】：通过薄片、岩心、测井和地震资料,对四川盆地川西坳陷中段龙门山前石羊场-金马-鸭子河地区雷口坡组四段上亚段储层高频层序、沉积微相进行研究;结合储层测井解释结果,总结储层在层序和沉积微相中的分布,分析层序沉积对储层发育的控制。结果表明,雷四上亚段构成一个完整四级层序,并可进一步划分为多个五级和六级高频层序。高频层序的向上变浅沉积旋回特征明显,横向对比好。雷四段上亚段在研究区主要为潮坪相沉积,主要发育潮间带和潮下带亚相,纵向上岩性多变,横向上分布较为稳定。潮间带是储层发育的有利亚相,可划分为云坪、藻云坪和灰云坪等微相;潮下带可划分为灰坪、藻灰坪和云灰坪等微相。潮间带粉晶云坪、藻(层叠)云坪是优质储层发育的有利微相,一般发育于上、下两个储层段高频层序中、上部,储层旋回对比性好。高频层序控制潮间带有利沉积微相分布,对后期成岩作用也具有一定的影响,是储层空间展布与储层发育的关键控制因素。
[Abstract]:Through thin slice, core, logging and seismic data, the high frequency sequence and sedimentary microfacies of the upper submember of the 4th member of the Leikoupo formation in the Longmen Mountain Qianshiyangchang-Jinma-duck River area, Sichuan Basin are studied. Combined with the result of reservoir log interpretation, the distribution of reservoir in sequence and sedimentary microfacies is summarized, and the control of sequence deposition on reservoir development is analyzed. It can be further divided into five and six high frequency sequences. The upward shallow sedimentary cycle of the high frequency sequence is obvious, and the horizontal correlation is good. The upper submember of the fourth member of the Lei formation is mainly tidal flat facies in the study area, and the intertidal zone and subtidal zone subfacies are mainly developed. The intertidal zone can be divided into cloud flat, algal cloud flat and grey cloud flat, while the subtidal zone can be divided into grey flat, intertidal zone and calcareous flat, the intertidal zone is the reservoir developed facies, and can be divided into cloud flat, algal cloud flat and grey cloud flat. Microfacies such as algal ash flat and cloud ash flat. The intertidal powder crystal cloud flat and algal (stratified) cloud flat are the favorable microfacies for the development of high quality reservoir, which are generally developed in the high frequency sequence and upper part of the upper and lower reservoirs. The high frequency sequence controls the distribution of sedimentary microfacies in the intertidal zone and has a certain influence on the diagenesis in the later period, which is the key controlling factor of reservoir spatial distribution and reservoir development.
【作者单位】：页岩油气富集机理与有效开发国家重点实验室;中国石化海相油气藏开发重点实验室;中国石化石油勘探开发研究院;
【基金】：国家科技重大专项(2016ZX05017005) 中石化科技部项目(P16111)
【分类号】：P618.13

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