准噶尔盆地西北缘风城组白云岩成因及油气富集因素
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摘要
利用钻井、岩心、地震、测井及地球化学资料,分析准噶尔盆地西北缘二叠系风城组白云岩沉积环境、成因、分布规律及白云岩储集层油气富集高产因素。风城组白云岩按产状和沉积构造可分为纹层状泥质白云岩、薄层状白云岩和斑状白云岩,主要为准同生白云岩和后生白云石化白云岩。准同生白云岩形成于半深湖咸水环境;后生白云石化白云岩是发育在半深湖咸水环境下的碳酸盐岩灰泥在成岩期经后生白云石化作用形成。白云岩主要分布在火山喷发或逆冲断裂活动形成的古地貌斜坡上。白云岩储集层的储集空间主要为溶蚀孔隙和裂隙。白云岩储集层富集高产的控制因素是裂缝及构造背景。
Using the data of cores,well logging interpretations,seismic sections and experimental geochemistry,this paper analyzes the sedimentary environment,genesis,and distribution of dolomites,as well as the hydrocarbon enrichment factors of dolomite reservoirs in the Permian Fengcheng Formation.According to attitude and structure,the dolomites of the Fengcheng Formation are divided into lamina dolomites,thin-bed dolomites,and spotted dolomites.They are mainly the penecontemporaneous and epigenetic dolomites,the former was deposited in a saline semi-deep lake,while the latter results from the dolomitization of lime mud that was deposited in a saline semi-deep lake during the diagenetic stage.The dolomites are distributed at the palaeoslopes formed by volcano eruption and movement of thrust faults and the main dolomite reservoir spaces are dissolved pores and fractures.The factors controlling hydrocarbon enrichment are fractures and structural background.
Using the data of cores,well logging interpretations,seismic sections and experimental geochemistry,this paper analyzes the sedimentary environment,genesis,and distribution of dolomites,as well as the hydrocarbon enrichment factors of dolomite reservoirs in the Permian Fengcheng Formation.According to attitude and structure,the dolomites of the Fengcheng Formation are divided into lamina dolomites,thin-bed dolomites,and spotted dolomites.They are mainly the penecontemporaneous and epigenetic dolomites,the former was deposited in a saline semi-deep lake,while the latter results from the dolomitization of lime mud that was deposited in a saline semi-deep lake during the diagenetic stage.The dolomites are distributed at the palaeoslopes formed by volcano eruption and movement of thrust faults and the main dolomite reservoir spaces are dissolved pores and fractures.The factors controlling hydrocarbon enrichment are fractures and structural background.
引文
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[2]吴孔友,查明,王绪龙,等.准噶尔盆地构造演化与动力学背景再认识[J].地球学报,2005,26(3):217-222.Wu Kongyou,Zha Ming,Wang Xulong,et al.Further researches onthe tectonic evolution and dynamic setting of the Junggar Basin[J].Acta Geoscientica Sinica,2005,26(3):217-222.
[3]康玉柱.中国油气地质新理论的建立[J].地质学报,2010,84(9):1231-1274.Kang Yuzhu.Establishment of China’s theory of oil and gasgeology[J].Acta Geologica Sinica,2010,84(9):1231-1274.
[4]何登发,陈新发,张义杰,等.准噶尔盆地油气富集规律[J].石油学报,2004,25(3):1-10.He Dengfa,Chen Xinfa,Zhang Yijie,et al.Enrichmentcharacteristics of oil and gas in Junggar Basin[J].Acta PetroleiSinica,2004,25(3):1-10.
[5]耳闯,王英民,颜耀敏,等.构造活动盆地层序地层特征与主控因素分析:以准噶尔盆地克—百地区二叠系为例[J].沉积学报,2009,27(6):1101-1108.Er Chuang,Wang Yingmin,Yan Yaomin,et al.Sequence stratigraphycharacteristics and main controlling factors of the tectonic activebasin:As an example from Permian of the Kebai area in thenorthwestern Junggar Basin[J].Acta Sedimentologica Sinica,2009,27(6):1101-1108.
[6]祝彦贺,王英民,袁书坤,等.准噶尔盆地西北缘沉积特征及油气成藏规律:以五、八区佳木河组为例[J].石油勘探与开发,2008,35(5):576-580.Zhu Yanhe,Wang Yingmin,Yuan Shukun,et al.Sedimentarycharacteristics and hydrocarbon accumulation rules in northwesternJunggar Basin:A case from Jiamuhe Formation of No.5 and 8area[J].Petroleum Exploration and Development,2008,35(5):576-580.
[7]张国栋,王慧中.中国东部早第三纪海侵和沉积环境:以苏北盆地为例[M].北京:地质出版社,1987.Zhang Guodong,Wang Huizhong.Paleogene transgression andsedimentary environment of China’s east part:A case study of Subeibasin[M].Beijing:Geological Publishing House,1987.
[8]邓宏文,钱凯.沉积地球化学与环境分析[M].兰州:甘肃科学技术出版社,1993.Deng Hongwen,Qian Kai.Analysis of sedimentary geochemistry andenvironment[M].Lanzhou:Gansu Science and TechnologyPublishing House,1993.
[9]王英华,周书欣,张绣莲.中国湖相碳酸盐岩[M].徐州:中国矿业大学出版社,1997.Wang Yinghua,Zhou Shuxin,Zhang Xiulian.Lacustrine carbonate inChina[M].Xuzhou:China University of Mining and TechnologyPress,1997.
[10]Epstein S,Buchsbaum R,Lowenstam H A,et al.Revisedcarbonate-water isotopic temperature scale[J].Bulletin of theGeological Society of America,1953,64:1315-1326.
[11]Keith M L,Anderson G M,Eichler R.Carbon and oxygen isotopiccomposition of mollusk shells from marine and fresh-waterenvironments[J].Geochimica et Cosmochimica Acta,1964,28(11):1757-1786.
[12]刘文彬.准噶尔盆地西北缘风城组沉积环境探讨[J].沉积学报,1989,7(1):61-70.Liu Wenbin.Study on sedimentary environment of FengchengFormation at Northwest margin of Junggar Basin[J].ActaSedimentologica Sinica,1989,7(1):61-70.
[13]郭建钢,赵小莉,刘巍,等.乌儿禾地区风城组白云岩储集层成因及分布[J].新疆石油地质,2009,30(6):699-701.Guo Jian’gang,Zhao Xiaoli,Liu Wei,et al.Origin and distribution ofdolomite reservoir of Permian Fengcheng Formation in Wu’erhe area,Junggar Basin[J].Xinjiang Petroleum Geology,2009,30(6):699-701.
[14]朱玉双,柳益群,周鼎武.三塘湖盆地中二叠统芦草沟组白云岩成因[J].西北地质,2009,42(2):95-99.Zhu Yushuang,Liu Yiqun,Zhou Dingwu.Origin of dolostone inLucaogou Formation of Middle Permian in Santanghu Basin[J].Northwestern Geology,2009,42(2):95-99.
[15]马锋,许怀先,顾家裕,等.塔东寒武系白云岩成因及储集层演化特征[J].石油勘探与开发,2009,36(2):144-155.Ma Feng,Xu Huaixian,Gu Jiayu,et al.Cambrian dolomite originand reservoir evolution in east Tarim Basin[J].PetroleumExploration and Development,2009,36(2):144-155.
[16]张静,胡见义,罗平,等.深埋优质白云岩储集层发育的主控因素与勘探意义[J].石油勘探与开发,2010,37(2):203-210.Zhang Jing,Hu Jianyi,Luo Ping,et al.Master control factors of deephigh-quality dolomite reservoirs and the exploration significance[J].Petroleum Exploration and Development,2010,37(2):203-210.
[17]刘宝珺.沉积岩石学[M].北京:地质出版社,1984.Liu Baojun.Sedimentary lithology[M].Beijing:GeologicalPublishing House,1984.
[18]赫云兰,刘波,秦善.白云石化机理与白云岩成因问题研究[J].北京大学学报:自然科学版,2010,46(6):1010-1020.He Yunlan,Liu Bo,Qin Shan.Study on the dolomitization anddolostone genesis[J].Acta Scientiarum Naturalium UniversitatisPekinensis,2010,46(6):1010-1020.
[19]刘宝珺,张锦泉.沉积成岩作用[M].北京:科学出版社,1992.Liu Baojun,Zhang Jinquan.Sedimentary diagenesis[M].Beijing:Science Press,1992.
[20]丁安娜,惠荣耀,王屿涛.准噶尔盆地西北缘石炭、二叠系烃源岩有机岩石学特征[J].新疆石油地质,1994,15(3):220-225.Ding Anna,Hui Rongyao,Wang Yutao.Organic petrography ofhydrocarbon source rock of the Carboniferous and Permian inNorthwestern margin,Junggar Basin[J].Xinjiang Petroleum Geology,1994,15(3):220-225.
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