崖城13-1气田古近系渐新统陵三段储层特征与沉积微相分析
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摘要
目前对南海崖城13-1气田储层非均质性的认识还不清楚,气田储量动用程度较低,动态、静态地质储量差异较大。因此,利用岩心、测井和地震等资料对崖城13-1气田的主力生产层位进行沉积微相和储层特征开展综合研究尤为重要。崖城13-1气田勘探目的层段为古近系渐新统陵三段,主要形成于海陆过渡环境,发育辫状河三角洲,沉积亚相主要为上三角洲平原、下三角洲平原、三角洲内前缘和三角洲外前缘。储集砂体主要为中—粗砂岩和含砾粗砂岩,其沉积微相为水下分流河道、河口坝和远砂坝。储层物性较好,孔隙度大于10%。储层物性主要受控于压实作用、溶蚀作用和沉积微相。
The previous studies on reservoir heterogeneity for the Yacheng13-1 gas field are not very convincing;the reserves of some areas are not produced very well;the difference between dynamic and static geological reserves is obvious.Therefore,it is very important to do research on depositional facies and characteristics of the Yacheng13-1 gas field in detail using the well coring,logging data and seismic data adequately,particularly on the major pay zone,the third Member of the Lingshui Formation(Lingshui Ⅲ).Lingshui Ⅲ belongs to marine-shore transitional environment,its depositional facies is braided delta.The main reservoirs are medium-coarse sandstone and conglomeratic coarse sandstone,and the sedimentary micofacies are distributary channel,mouth bar,and distal bar.The reservoir properties are good and porosity is larger than 10%.The reservoir properties are controlled by microfacies,later compaction,and corrosion.
The previous studies on reservoir heterogeneity for the Yacheng13-1 gas field are not very convincing;the reserves of some areas are not produced very well;the difference between dynamic and static geological reserves is obvious.Therefore,it is very important to do research on depositional facies and characteristics of the Yacheng13-1 gas field in detail using the well coring,logging data and seismic data adequately,particularly on the major pay zone,the third Member of the Lingshui Formation(Lingshui Ⅲ).Lingshui Ⅲ belongs to marine-shore transitional environment,its depositional facies is braided delta.The main reservoirs are medium-coarse sandstone and conglomeratic coarse sandstone,and the sedimentary micofacies are distributary channel,mouth bar,and distal bar.The reservoir properties are good and porosity is larger than 10%.The reservoir properties are controlled by microfacies,later compaction,and corrosion.
引文
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[2]孙嘉陵.南海崖13-1气田特征及富集成藏条件[J].天然气工业,1994,14(2):1-7.
[3]于兴河.碎屑岩系油气储层沉积学[M].北京:石油工业出版社,2002.
[4]于兴河,马兴祥.辫状河储层地质模式及层次界面分析[M].北京:石油工业出版社,2004.
[5]于兴河,王德发,孙志华.湖泊辫状河三角洲岩相、层序特征及储层地质模型——内蒙古贷岱海湖现代三角洲沉积考察[J].沉积学报,1995,13(1):48-58.
[6]陆永潮,向才富,陈平.层序地层学在碎屑岩成岩作用研究中的应用——以崖城13-1气田下第三系为例[J].石油实验地质,1999,21(2):100-103.
[7]史建南,郝芳,邹华耀.琼东南盆地崖13-1高效天然气藏成藏机理研究[J].天然气地球科学,2006,17(6):807-810.
[8]刘春慧,金振奎,朱桂芳,等.准噶尔盆地东部吉木萨尔凹陷二叠系梧桐沟组储层物性特征及控制因素[J].天然气地球科学,2007,18(3):375-379.
[9]王卓卓,梁江平,李国会,等.成岩作用对储层物性的影响及与沉积环境的关系——以鄂尔多斯盆地劳山地区为例[J].天然气地球科学,2008,19(2):171-177.
[10]唐海发,赵彦超,汪立君.胜坨气田明化镇组下段沉积微相特征及其与储层物性的关系[J].天然气地球科学,2004,15(3):257-260.
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