莺歌海盆地乐东区乐东S-1气田莺歌海组一段储集体沉积特征
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摘要
莺歌海盆地乐东区莺歌海组一段是重要的天然气勘探目的层,其储集体特征及成因分析对于盆地浅层勘探具有重要意义。通过对乐东S-1气田主力产层莺歌海组一段储集体沉积背景、岩心资料、测井及地震资料的综合研究,认为莺歌海组一段储集体为"强制海退形成沉积坡折背景下的滨岸-浅海沉积体系"。储层骨架砂岩主要发育在沉积坡折之上,为滨岸相临滨滩坝复合砂岩,沉积坡折以下多以浅海相泥岩、泥质粉砂岩为主,储层不发育。储集体具有"纵向多期旋回叠置、平面NW-SE向条带展布"的特征。
The first member of Yinggehai Formation in Ledong Area of Yinggehai Basin was an important gas exploration target layer,the reservoir genesis and its characteristics was of great significance for shallow layer exploration in the basin.Based on the integrated analysis of reservoir sedimentary background,core data,well logging and seismic data,it was considered that Yinggehai Formation Reservoir is a "forced regressive formation sedimentary slope under the background of shore to shallow sea sedimentary system",the reservoirs are mainly developed in the framework above the slope of sandstone sedimentary,it was Shoreface beach bar sandstone,beneath the sedimentary slope,there are neritic facies mudstone,argillaceous siltstone,where reservoirs are developed.The reservoir has the characteristics of "vertical multi-cycle overlay",and it is distributed in NW-SE in the plane.
The first member of Yinggehai Formation in Ledong Area of Yinggehai Basin was an important gas exploration target layer,the reservoir genesis and its characteristics was of great significance for shallow layer exploration in the basin.Based on the integrated analysis of reservoir sedimentary background,core data,well logging and seismic data,it was considered that Yinggehai Formation Reservoir is a "forced regressive formation sedimentary slope under the background of shore to shallow sea sedimentary system",the reservoirs are mainly developed in the framework above the slope of sandstone sedimentary,it was Shoreface beach bar sandstone,beneath the sedimentary slope,there are neritic facies mudstone,argillaceous siltstone,where reservoirs are developed.The reservoir has the characteristics of "vertical multi-cycle overlay",and it is distributed in NW-SE in the plane.
引文
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[2]吴因业,张天舒,张志杰,等.沉积体系域类型、特征及石油地质意义[J].古地理学报,2010,12(1):69～80.
[3]Mitchum R M,Wagoner J C.High frequency sequences and their stacking patterns:Sequence stratigraphic evidence of high frequencyeustatic cycles[J].Sedimentary Geology,1991,70(2):131～160.
[4]谢玉洪,王振峰,解习农,等.莺歌海盆地坡折带特征及其对沉积体系的控制[J].地球科学(中国地质大学学报),2004,29(5):569～574.
[5]冯增昭,王英华,刘焕杰,等.中国沉积学[M].北京:石油工业出版社,1994.482～488.
[6]冯增昭.沉积岩石学[M].第2版.北京:石油工业出版社,1994.119～126.
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