摘要
春光油田位于准噶尔盆地西缘车排子凸起,由于其砂体厚度薄、成因类型多样,导致储层预测难度加大。综合利用三维地震、测井、岩心及分析测试资料,运用高分辨率层序地层学方法,建立了春光油田古近系层序地层格架,并对其砂体的成因类型进行了划分,从岩性特征、沉积厚度及分布特征等方面总结了各类砂体的识别标志,又从水体深度、物源供给、水动力条件及地层发育样式等4个方面,探讨了砂体类型及分布规律的控制因素,并建立了春光油田古近系砂体成因模式。研究结果表明:春光油田古近系地层以辫状河三角洲及湖相沉积为主,发育辫状河三角洲前缘、前三角洲及滨浅湖亚相;砂体成因类型主要为水下分流河道砂体、前缘席状砂体和滩坝砂体。平缓的地形、丰富的物源、湖平面的频繁变化及波浪的侧向改造均是春光油田古近系砂体成因的主要控制因素。
Chunguang Oilfield is located at Chepaizi uplift in western Junggar Basin, and its thin sand body and various genetic types made the reservoir distribution hard to predict. Based on composite analyses of three dimensional seismic, well logging, core and analysis assay data, combined with high resolution sequence stratigraphy method, this paper established sequence stratigraphy framork of Paleogene, divided the genetic types of sand bodies, and concluded the identification signs of different types of sand bodies from the aspects of lithologies, sedimentary thickness and distribution features. Through the control effects of water depth, sediment supply, hydrodynamic conditions and formation development style, the sand body types and distribution rule were discussed and the genetic model of Paleocene sand bodies in Chunguang Oilfield were established. The results show that the Paleogene in Chunguang Oilfield developed braided river delta and lake facies, braided river delta front, front delta and coastal shallow-lake subfacies are developed,and the genetic types of sand bodies mainly are underwater distributary channel, front sheet sand and bank bars. Flat terrain, abundant source rocks, changes of lake-level and wave transformation are the main controlling factors for the genesis of Paleogene sand bodies.
引文
[1]杨永利,陆永潮,李祥权,等.准西车排子地区中新生界层序格架及砂体预测模式[J].地球科学——中国地质大学学报,2012,37(4):743-750.Yang Yongli,Lu Yongchao,Li Xiangquan,et al.Mesozoic Cenozoic sequence framework and sandstone predication model in Chepaizi area,western Junggar basin[J].Earth Science—Journal of China University of Geosciences,2012,37(4):743-750.
[2]刘传虎,王学忠.准噶尔盆地车排子地区层序地层结构及有利储集相带[J].新疆石油地质,2012,33(1):1-5.Liu Chuanhu,Wang Xuezhong.Stratigraphic sequence structure and favorable facies belt in Chepaizi area of Junggar basin[J].Xinjiang Petroleum Geology,2012,33(1):1-5.
[3]杨勇,陈世悦,向奎,等.准噶尔盆地西北缘车排子地区下白垩统层序地层与沉积演化[J].中国石油大学学报:自然科学版,2011,35(5):20-26.Yang Yong,Chen Shiyue,Xiang Kui,et al.Sequence stratigraphy and sedimentary evolution of Lower Cretaceous series in Chepaizi area,north western margin of Junggar basin[J].Journal of China University of Petroleum:Edition of Natural Science,2011,35(5):20-26.
[4]张立强,罗晓容,何登发,等.准噶尔盆地南缘下白垩统层序界面的识别[J].沉积学报,2004,22(4):636-643.Zhang Liqiang,Luo Xiaorong,He Dengfa,et al.Sequence boundaries of the lower cretaceous,southern Junggar Basin[J].Acta Sedimentologica Sinca,2004,22(4):636-643.
[5]何登发,陈新发,况军,等.准噶尔盆地车排子-莫索湾古隆起的形成演化与成因机制[J].地学前缘,2008,15(4):42-55.He Dengfa,Chen Xinfa,Kuang Jun,et al.Development and genetic mechanism of Chepaizi-Mosuowan uplift in Junggar basin[J].Earth Science Frontiers,2008,15(4):42-55.
[6]侯连华,王京红,匡立春,等.准噶尔盆地车莫古隆起内物源沉积体系探讨及勘探意义——以白垩系清水河组一段为例[J].地学前缘,2009,16(6):337-348.Hou Lianhua,Wang Jinghong,Kuang Lichun,et al.Provenance sediments and its exploration significance—A case from member l of Qingshuihe Formation of Lower Cretaceous in Junggar Basin[J].Earth Science Frontiers,2009,16(6):337-348.
[7]武富礼,姚志刚.碎屑锆石U-Pb定年在准噶尔盆地南缘物源研究中的应用[J].西安石油大学学报:自然科学版,2011,26(3):6-13.Wu Fuli,Yao Zhigang.Application of U-Pb dating in the study on the provenance analysis of detrital zircons in the southern margin of Junggar Basin[J].Journal of Xi’an Shiyou University:Natural Science Edition,2011,26(3):6-13.
[8]万延周,周立发,白斌,等.准噶尔盆地南缘水西沟群物源分析[J].岩性油气藏,2009,21(2):35-41.Wan Yanzhou,Zhou Lifa,Bai Bin,et al.Provenance analysis of Shuixigou Group in southern margin of Junggar Basin[J].Lithologic Reservoirs,2009,21(2):35-41.
[9]邓宏文,马立祥,姜正龙,等.车镇凹陷大王北地区沙二段滩坝成因类型、分布规律与控制因素研究[J].沉积学报,2008,26(5):715-724.Deng Hongwen,Ma Lixiang,Jiang Zhenglong,et al.Sand bank generation types and its controls on their distribution,the second member of Shahejie Formation,Lower Tertiary,Dawangbei,Chezhen Depression[J].Acta Sedimentologica Sinca,2008,26(5):715-724.
[10]杨勇强,邱隆伟,姜在兴,等.东营凹陷沙四上亚段滩坝物源体系[J].吉林大学学报:地球科学版,2011,41(1):46-53.Yang Yongqiang,Qiu Longwei,Jiang Zaixing,et al.Beach barprovenance system on the upper part of fourth member of Shahejie Formation,in Dongying Sag[J].Journal of Jilin University:Earth Science Edition,2011,41(1):46-53.
[11]张鑫,张金亮.惠民凹陷中央隆起带沙四上亚段滩坝与风暴岩组合沉积[J].沉积学报,2009,27(2):246-253.Zhang Xin,Zhang Jinliang.Composite deposits of beach bar and tempestite in the upper fourth member of Shahejie Formation in the central up lift Belt of Huim in Depression[J].Acta Sedimentologica Sinca,2009,27(2):246-253.
[12]殷建国,丁超,辜清,等.准噶尔盆地西北缘乌风地区风城组白云质岩类储层特征及控制因素分析[J].岩性油气藏,2012,24(5):83-88.Yin Jianguo,Ding Chao,Gu Qing,et al.Reservoir characteristics and controlling factors of dolomitic rocks of Fengcheng Formation in Wufeng area,northwestern margin of Junggar Basin[J].Lithologic Reservoirs,2012,24(5):83-88.
[13]刘英辉,朱筱敏,朱茂,等.准噶尔盆地乌—夏地区二叠系风城组致密油储层特征[J].岩性油气藏,2014,26(4):66-72.Liu Yinghui,Zhu Xiaomin,Zhu Mao,et al.Characteristics of tight oil reservoirs of the Permian Fengcheng Formation in Wu-Xia area,Junggar Basin[J].Lithologic Reservoirs,2014,26(4):66-72.
[14]靖辉,江洪,向奎.准噶尔盆地西缘车排子地区岩性油气藏成藏主控因素[J].石油实验地质,2007,29(4):377-383.Jing Hui,Jiang Hong,Xiang Kui.Key factors to control formation conditions of stratigraphic pools in Chepaizi area,the west of the Junggar Basin[J].Petroleum Geology&Experiment,2007,29(4):377-383.
[15]柳双权,曹元婷,赵光亮,等.准噶尔盆地陆东—五彩湾地区石炭系火山岩油气藏成藏影响因素研究[J].岩性油气藏,2014,26(5):23-29.Liu Shuangquan,Cao Yuanting,Zhao Guangliang,et al.Influencing factors of Carboniferous volcanic reservoir in Ludong-Wucaiwan area,Junggar Basin[J].Lithologic Reservoirs,2014,26(5):23-29.
[16]况军,斯春松,唐勇,等.准噶尔盆地腹部侏罗系砂体成因类型与储集性能[J].新疆石油地质,2005,26(2):145-147.Kuang Jun,Si Chunsong,Tang Yong,et al.On genetic type and reservoir quality of Jurassic sands in hinterland of Junggar Basin[J].Xinjiang Petroleum Geology,2005,26(2):145-147.
[17]赵建章,李双文,刘洛夫,等.准噶尔盆地莫北凸起三工河组砂体成因及组合类型[J].新疆石油地质,2007,28(5):572-575.Zhao Jianzhang,Li Shuangwen,Liu Luofu,et al.Genetic types of Sangonghe sands and assemblage patterns of Mobei Arc in Junggar Basin[J].Xinjiang Petroleum Geology,2007,28(5):572-575.