塔里木轮南油田寒武系坡折带的层序和储层
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摘要
寒武纪西高东低的海底地貌显著控制着塔里木板块轮南区的岩相差异。轮南寒武系可划分为6个层序,每个层序的地震反射总体上显示较弱,从西到东可划分出3种地震相并分别对应3个沉积带:平行连续地震相指示碳酸盐岩台地、杂乱丘状地震相指示台缘高能带、斜交连续地震相指示斜坡。不同层序在坡折带附近相互叠置,从下到上显示为台地有西向东迁移的趋势,平面上呈南北向展布。坡折带规模大,与轮南隆起巨型台背斜构造配置好,紧邻寒武系油源区,白云岩储层发育,溶蚀孔洞、裂逢、晶间孔综合构成主要储集空间,台地相低能带致密碳酸盐岩可作为盖层,这些因素优化坡折带为油气勘探的最好靶区。
The Tarim Basin deepened eastward during the Cambrian, and this paleotopographic feature controlled the lithological differentiation of the Lunnan region, Xinjiang. In the Lunnan region, six sequences can be recognized from the Cambrian System, whose seismic reflections are generally weak. Three seismic facies can be distinguished from west to east, which correspond to three sedimentary environments respectively. The parallel continuous reflection facies indicates carbonate platform; the irregular hummocky reflection facies indicates high-energy platform margin, and the continuous oblique reflection facies indicates slope. Different sequences superimpose on one another within the slope-break region. Throughout the sequences, however, platform migrated basinward to the east, resulting in a horizontally spread along the belt from the north to the south. The slope break is big in size, matching the tremendous anticline tectonically and close to the source rock spatially. Dolomite within the slope-break is an ideal reservoir with dissolution porosity, fissures and inter-crystal pores. Moreover, the fine-grained carbonate rock of the low-energy platform facies can be a cap. These features are favorable for further oil-gas exploration in the slope-break belt of the Tarim Basin.
The Tarim Basin deepened eastward during the Cambrian, and this paleotopographic feature controlled the lithological differentiation of the Lunnan region, Xinjiang. In the Lunnan region, six sequences can be recognized from the Cambrian System, whose seismic reflections are generally weak. Three seismic facies can be distinguished from west to east, which correspond to three sedimentary environments respectively. The parallel continuous reflection facies indicates carbonate platform; the irregular hummocky reflection facies indicates high-energy platform margin, and the continuous oblique reflection facies indicates slope. Different sequences superimpose on one another within the slope-break region. Throughout the sequences, however, platform migrated basinward to the east, resulting in a horizontally spread along the belt from the north to the south. The slope break is big in size, matching the tremendous anticline tectonically and close to the source rock spatially. Dolomite within the slope-break is an ideal reservoir with dissolution porosity, fissures and inter-crystal pores. Moreover, the fine-grained carbonate rock of the low-energy platform facies can be a cap. These features are favorable for further oil-gas exploration in the slope-break belt of the Tarim Basin.
引文
程日辉,王璞-,刘万洙,孙晓猛,单玄龙.2006.库鲁克塔格地区寒武系层序地层与发育模式.新疆地质,24(4):353—360
丁勇,云露,王允诚.2006.塔河油田寒武系台缘大型建隆地质属性.新疆石油地质,27(1):35—37
樊太亮,于炳松,高志前.2007.塔里木盆地碳酸盐岩层序地层特征及其控油作用.现代地质,21(1):57—65
康玉柱.2005.塔里木盆地寒武-奥陶系古岩溶特征与油气分布.新疆石油地质,26(5):472—480
罗俐,沈昭国.1995.塔里木盆地寒武—奥陶系石油地质特征.西南石油学院学报,17(2):49—54
许效松,汪正江,万方,傅恒.2005.塔里木盆地早古生代构造古地理演化与烃源岩,地学前缘,12(3):49—57
叶留生,王根长,翟晓先.1997.塔里木盆地库车河及柯坪地质.新疆地质,15(2):174—192
于炳松.1996.塔里木盆地北部寒武系海平面变化研究.沉积学报,14(1):33—39
于炳松,陈建强,林畅松.2001.塔里木地台北部寒武纪—奥陶纪层序地层及其与扬子地台和华北地台的对比.中国科学(D辑),31(1):17—26
张云智.2000.塔里木盆地顺托果勒—满加尔地区寒武系、奥陶系沉积特征.矿物岩石,20(2):63—68
张振生,刘社平.1995.塔里木盆地下古生界碳酸盐岩层序地层学研究.石油地球物理勘探,30(2):245—256
张中宁,刘文汇,郑建京,王琪,陈国俊.2006.塔里木盆地塔北、塔中地区寒武-奥陶系碳酸盐岩中可溶有机组分的碳同位素逆转现象.矿物岩石,26(4):69—74
赵治信,谭泽金,唐鹏,肖继南.1999.塔里木盆地覆盖区奥陶纪生物地层.新疆石油地质,20(6):493—500
Cheng Ri-hui,Wang Pu-jun,Liu Wan-zhu,Sun Xiao-meng&ShanXuan-long.2006.Sequence stratigraphy and models for theCambrianin Kuluketage,Xinjiang.Xinjiang Geology,24(4):353—360
Ding Yong,Yun Lu&Wang Yun-cheng.2006.Geologic attributeof large-scale build-up on Cambrian Platform margin,Tahe Oil-field.Xinjiang Petroleum Geology,27(1):35—37
Fan Tai-liang,Yu Bing-song&Gao Zhi-qian.2007.Characteristicsof carbonate sequence stratigraphy and its control on oil-gas inTari m Basin.Geoscience,21(1):57—65
Kang Yu-zhu.2005.Paleokarst of Cambro-Ordovician and oil-gasdistribution in Tari m Basin.Xinjiang Petroleum Geology,26(5):472—480
Luo Li&Shen Zhao-guo.1995.Petroleum geologic features ofCambrian-Ordovician in Tari m Basin.Journal of SouthwesternPetroleumInstitute,17(2):49—54
Xu Xiao-song,Wang Zheng-jiang,Wan Fang&Fu Heng.2005.Tectonic paleogeographic evolution and source rocks of the Ear-ly Paleozoic in the Tari m Basin.Earth Science Frontiers,12(3):49—57
Ye Liu-sheng,Wang Gen-chang&Zhai Xiao-xian.1997.Geologyof the Kuqa River and Kalpin,Tari mBasin.Xinjiang Geology,15(2):174—192
15(2):174—192Yu Bing-song.1996.Study on sea-level change of Cambrian innorthern Tari m Basin.Acta Sedi mentologica Sinica,14(1):33—39
Yu Bing-song,Chen Jian-qiang&Lin Chang-song.2001.Cambrian-Ordovician sequence stratigraphy on the northern Tari m Plat-formandits correlation with Yangtze Platformand North ChinaPlatform.Science in China(Ser.D),44(4):373—384
Zhang Yun-zhi.2000.The depositional feature of Cambrian-Ordovi-cian Systemin Shuntuoguole-Manjiaer area of Tari m.MineralPetrol,20(2):63—68
Zhang Zhen-sheng&Liu She-ping.1995.Sequence stratigraphy a-nalysis of carbonate series of Lower Palaeozoic Group in theTali mu Basin.Oil Geophysical Prospecting,30(2):245—256
Zhang Zhong-ning,Liu Wen-hui,Zheng Jian-jing,Wang Qi&ChenGuo-jun.2006.Carbonisotopic reversed distribution of the sol-uble organic components for the Cambrian and Ordovician car-bonate rocksin Tabei and Tazhong Areas,Tari mBasin.Miner-al Petrol,26(4):69—74
Zhao Zhi-xin,Tan Ze-jin,Tang Peng&Xiao Ji-nan.1999.Bios-tratigraphy of Ordovician in cover area of Tari m Basin.Xin-jiang Petroleum Geology,20(6):493—500
丁勇,云露,王允诚.2006.塔河油田寒武系台缘大型建隆地质属性.新疆石油地质,27(1):35—37
樊太亮,于炳松,高志前.2007.塔里木盆地碳酸盐岩层序地层特征及其控油作用.现代地质,21(1):57—65
康玉柱.2005.塔里木盆地寒武-奥陶系古岩溶特征与油气分布.新疆石油地质,26(5):472—480
罗俐,沈昭国.1995.塔里木盆地寒武—奥陶系石油地质特征.西南石油学院学报,17(2):49—54
许效松,汪正江,万方,傅恒.2005.塔里木盆地早古生代构造古地理演化与烃源岩,地学前缘,12(3):49—57
叶留生,王根长,翟晓先.1997.塔里木盆地库车河及柯坪地质.新疆地质,15(2):174—192
于炳松.1996.塔里木盆地北部寒武系海平面变化研究.沉积学报,14(1):33—39
于炳松,陈建强,林畅松.2001.塔里木地台北部寒武纪—奥陶纪层序地层及其与扬子地台和华北地台的对比.中国科学(D辑),31(1):17—26
张云智.2000.塔里木盆地顺托果勒—满加尔地区寒武系、奥陶系沉积特征.矿物岩石,20(2):63—68
张振生,刘社平.1995.塔里木盆地下古生界碳酸盐岩层序地层学研究.石油地球物理勘探,30(2):245—256
张中宁,刘文汇,郑建京,王琪,陈国俊.2006.塔里木盆地塔北、塔中地区寒武-奥陶系碳酸盐岩中可溶有机组分的碳同位素逆转现象.矿物岩石,26(4):69—74
赵治信,谭泽金,唐鹏,肖继南.1999.塔里木盆地覆盖区奥陶纪生物地层.新疆石油地质,20(6):493—500
Cheng Ri-hui,Wang Pu-jun,Liu Wan-zhu,Sun Xiao-meng&ShanXuan-long.2006.Sequence stratigraphy and models for theCambrianin Kuluketage,Xinjiang.Xinjiang Geology,24(4):353—360
Ding Yong,Yun Lu&Wang Yun-cheng.2006.Geologic attributeof large-scale build-up on Cambrian Platform margin,Tahe Oil-field.Xinjiang Petroleum Geology,27(1):35—37
Fan Tai-liang,Yu Bing-song&Gao Zhi-qian.2007.Characteristicsof carbonate sequence stratigraphy and its control on oil-gas inTari m Basin.Geoscience,21(1):57—65
Kang Yu-zhu.2005.Paleokarst of Cambro-Ordovician and oil-gasdistribution in Tari m Basin.Xinjiang Petroleum Geology,26(5):472—480
Luo Li&Shen Zhao-guo.1995.Petroleum geologic features ofCambrian-Ordovician in Tari m Basin.Journal of SouthwesternPetroleumInstitute,17(2):49—54
Xu Xiao-song,Wang Zheng-jiang,Wan Fang&Fu Heng.2005.Tectonic paleogeographic evolution and source rocks of the Ear-ly Paleozoic in the Tari m Basin.Earth Science Frontiers,12(3):49—57
Ye Liu-sheng,Wang Gen-chang&Zhai Xiao-xian.1997.Geologyof the Kuqa River and Kalpin,Tari mBasin.Xinjiang Geology,15(2):174—192
15(2):174—192Yu Bing-song.1996.Study on sea-level change of Cambrian innorthern Tari m Basin.Acta Sedi mentologica Sinica,14(1):33—39
Yu Bing-song,Chen Jian-qiang&Lin Chang-song.2001.Cambrian-Ordovician sequence stratigraphy on the northern Tari m Plat-formandits correlation with Yangtze Platformand North ChinaPlatform.Science in China(Ser.D),44(4):373—384
Zhang Yun-zhi.2000.The depositional feature of Cambrian-Ordovi-cian Systemin Shuntuoguole-Manjiaer area of Tari m.MineralPetrol,20(2):63—68
Zhang Zhen-sheng&Liu She-ping.1995.Sequence stratigraphy a-nalysis of carbonate series of Lower Palaeozoic Group in theTali mu Basin.Oil Geophysical Prospecting,30(2):245—256
Zhang Zhong-ning,Liu Wen-hui,Zheng Jian-jing,Wang Qi&ChenGuo-jun.2006.Carbonisotopic reversed distribution of the sol-uble organic components for the Cambrian and Ordovician car-bonate rocksin Tabei and Tazhong Areas,Tari mBasin.Miner-al Petrol,26(4):69—74
Zhao Zhi-xin,Tan Ze-jin,Tang Peng&Xiao Ji-nan.1999.Bios-tratigraphy of Ordovician in cover area of Tari m Basin.Xin-jiang Petroleum Geology,20(6):493—500
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