元坝地区须家河组须二段大型三角洲砂体特征
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摘要
在前人所做工作基础上,通过电测曲线结合取心、薄片鉴定、粒度分析等资料,对元坝地区典型井须家河组须二段下亚段进行了单井沉积相划分,识别出辫状河三角洲前缘、湖泊等沉积相类型;通过16口井砂岩统计,绘制等厚图,结合野外露头资料、地震波反射结构和解释地震相图(波形分类),识别出一个大型三角洲砂体,其前缘主河道区即元坝西部及以西地区。
Based on previous research and other data from typical wells of Yuanba area,for example well-logging curve,coring, thin-section identification and grain-size analysis,the sedimentary facies of lower Xujiahe 2 Member are classified in this study; and both braided-delta front facies and lacustrine faceis are also identified.Moreover,according to some sandstone statistics of 16 wells,isopachous map,outcrop data,seismic-wave refection framework and seismic-facies map(waveform classification),a large-scale deltaic sandbody is also recognized and the frontal main channel zones are composed of the west and to the west of Yuanba area.
Based on previous research and other data from typical wells of Yuanba area,for example well-logging curve,coring, thin-section identification and grain-size analysis,the sedimentary facies of lower Xujiahe 2 Member are classified in this study; and both braided-delta front facies and lacustrine faceis are also identified.Moreover,according to some sandstone statistics of 16 wells,isopachous map,outcrop data,seismic-wave refection framework and seismic-facies map(waveform classification),a large-scale deltaic sandbody is also recognized and the frontal main channel zones are composed of the west and to the west of Yuanba area.
引文
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[2]张明利,金之钧,汤良杰,等.前陆盆地研究的回顾与展望[J].地质论评,2002,48(2):214-220.
[3]宋岩,赵孟军,柳少波,等.中国前陆盆地油气富集规律[J].地质论评,2006,52 (1):85-92.
[4]孙肇才.中国中西部中—新生代前陆类盆地及其含油气性[J].海相油气地质,1998,3(4):16-30.
[5]陈发景,汪新文.含油气盆地地球动力学模式[J].地质论评,1996,42(4):314-310.
[6]王金琪.安县构造运动[J].石油与天然气地质.1990,10 (3):223-234.
[7]李绍虎,吴冲龙,王华,等.四川须家河组层序地层格架与天然气成藏的关系[J].石油与天然气地质,1998,19 ??(2):146-151.
[8]姬惠敏,罗啸泉.川西三叠系含气系统特征及勘探目标分析[J].天然气勘探与开发,2002,25(2):12-13.
[9]张虹.川西致密碎屑岩气藏描述的物探方法技术[J].石油物探.2002,41(增刊):253-260.
[10]林良彪,陈洪德.四川盆地西部须家河组砂岩组分及其古地理探讨[J].石油实验地质,2006,28(6): 511-517.
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