塔里木盆地台盆区中西部中下奥陶统鹰山组沉积环境研究
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摘要
关于鹰山组的等时性,前人已作过论述,在此基础上,通过露头、地震相、地层等厚图和岩心分析等手段,恢复了鹰山组沉积环境,明确了以下几个问题:1)道保湾阶和大湾阶台地边缘相带展布及台地边缘类型,指出台带边缘相带上高能礁滩体分布的不连续性;2)碳酸盐台地台缘滩和台内滩广泛发育,滩体形状多为长条形或椭圆型,其走向多平行于台地边缘;3)台地内部有台内洼地存在,台内洼地周围有颗粒滩和生物丘分布,通常在迎风面为滩体,在背风面为生物丘。台内洼地内的沉积物通常是"深水"的富含有机质的碳酸盐,具有较好的生油条件。
The time equivalent Yingshan Formation in Tarim Basin has been discussed.Based on this,the sedimentary environment of Yingshan Formation was reconstructed,with the aid of outcrops,seismic facies,strata contour map and core analysis,and draw three conclusions as follows:①The distribution characteristic of platform edge at Daobaowanian Stage and Dawanian Stage and the type of platform were definite.Besides,the viewpoint that the discontinuity of reef and beach along the platform edge was put forward.②Carbonate sands are wild range and the shape is multifarious.Generally,they are elongate or elliptical and strike of sands is parallel to the platform edge.③The existence of intrashelf basin was proved.Along the edge of intrashelf basin there are carbonate sands and bioherm,generally sands on windward side and bioherm on lee side.In intrashelf basin sediments predominatly consist of pelagic carbonates,which are commonly rich in organic content.
The time equivalent Yingshan Formation in Tarim Basin has been discussed.Based on this,the sedimentary environment of Yingshan Formation was reconstructed,with the aid of outcrops,seismic facies,strata contour map and core analysis,and draw three conclusions as follows:①The distribution characteristic of platform edge at Daobaowanian Stage and Dawanian Stage and the type of platform were definite.Besides,the viewpoint that the discontinuity of reef and beach along the platform edge was put forward.②Carbonate sands are wild range and the shape is multifarious.Generally,they are elongate or elliptical and strike of sands is parallel to the platform edge.③The existence of intrashelf basin was proved.Along the edge of intrashelf basin there are carbonate sands and bioherm,generally sands on windward side and bioherm on lee side.In intrashelf basin sediments predominatly consist of pelagic carbonates,which are commonly rich in organic content.
引文
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9高志前,樊太亮,焦志峰,等.塔里木盆地寒武—奥陶系碳酸盐岩台地样式及其沉积响应特征[J].沉积学报,2006,24(1):19-27[Gao Zhiqian,Fan Tailiang,Jiao Zhifeng,et al.The structural types and depositional characteristics of carbonate platform in the Cambrian-Ordovician of Tarim Basin[J].Acta Sedimentologica Sinica,2006,24(1):19-27]
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1贾承造,张师本,吴绍祖,等.塔里木盆地及周边地层[M].北京:科学出版社,2004[Jia Chengzao,Zhang Shiben,Wu Shaozu,et al.Sttratigraphy of the Tarim Basin and Adjacent Areas[M].Beijing:Sci-ence Press,2004]
2赵治信,雍天寿,贾承造,等.塔里木盆地地层[M].北京:石油工业出版社,1997[Zhao Zhixin,Yong Tianshou,Jia Chengzao,et al.Stra-tigraphy of the Tarim Basin[M].Beijing:Petroleum Industry Press,1997]
3Maurice E Tucker,Wright V Paul.Carbonate Sedimentology[M].Blackwell Science,1990
4陈明,许效松,万方,等.塔里木盆地柯坪地区中下奥陶统碳酸盐岩露头层序地层学研究[J].沉积学报,2004,22(1):110-116[Chen Ming,Xu Xiaosong,Wan Fang,et al.Study on outcrop sequence stra-tigraphy of the Lower-Middle Ordovician strata in Keping,Tarim Basin[J].Acta Sedimentologica Sinica,2004,22(1):110-116]
5Paul MHarris,Simo J A.Advanced in Carbonate Sequence Stratigra-phy:Application to Reservoirs,Outcrops and Models[M].SEPMSpe-cial Publication No.63
6孔金平,刘效曾.塔里木盆地塔中5井下奥陶统隐藻类生物礁[J].新疆石油地质,1998,19(3):221-224[Kong Jinping,Liu Xiaoceng.Lower Ordovician crypto-algae organic reef in Well TZ5in Tarim Basin[J].Xinjiang Petroleum Geology,1998,19(3):221-224]
7Gregor P Eberli,Jose Luis Masaferro,Sarg J F.Seismic imaging of carbonate reservoirs and systems[J].AAPG Memoir,2004,81:
8Masaferro J,Bourne R,Jauffred J C.Three-dimensional seismic visu-alization of carbonate reservoirs and structure[C]∥Eberli G P,Masaf-erro J L,Sarg J F,eds.Seismic imagination of carbonate reservoirs and system.AAPG Memoir,2004,81
9高志前,樊太亮,焦志峰,等.塔里木盆地寒武—奥陶系碳酸盐岩台地样式及其沉积响应特征[J].沉积学报,2006,24(1):19-27[Gao Zhiqian,Fan Tailiang,Jiao Zhifeng,et al.The structural types and depositional characteristics of carbonate platform in the Cambrian-Ordovician of Tarim Basin[J].Acta Sedimentologica Sinica,2006,24(1):19-27]
10Robertson C H.Review of carbonate sand-belt deposition of ooid grainstones and application to Mississippian reservoir,Damme Field,southwestern Kansas[J].AAPG Bulletin,1988,72:1184-1199
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