准噶尔盆地莫西庄油田成藏模式
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摘要
在油水关系、断层发育状况和成藏背景综合分析的基础上,探讨了准噶尔盆地莫西庄油田的成藏模式。分析认为,莫西庄油田三工河组二段下亚段油砂段内油水关系正常,不存在油水关系倒置的问题,而是具有统一的油水系统。煤层发育段地震属性特征揭示,早期解释的"大"断层为煤层反射所致,三工河组不发育规模性断层,不存在"一井一藏"的断层遮挡圈闭条件。三工河组二段上亚段和下亚段具有不同的成藏条件和油气分布特征,三工河组二段上亚段油藏发育于底部的曲流河三角洲前缘水下分流河道砂体中,有利含油部位平面上呈条带状分布。三工河组二段下亚段油藏发育于辫状河三角洲分流河道砂体中,含油成片分布。综合分析认为,莫西庄油田为一受构造和沉积微相双重控制、目前仍然处于地层掀斜后动态调整分配过程中的构造-岩性油气藏,三工河组二段下亚段内部具有与上倾砂体产状一致、统一的倾斜油水界面。
This paper discusses hydrocarbon accumulation patterns of Moxizhuang oilfield of the Junggar Basin based on a comprehensive analysis of oil-water relationship,fault occurrence and hydrocarbon accumulation background.The reservoir of J1s2(2)(the lower second member of the Jurassic Sangonghe Formation) in Moxizhuang oilfield has a uniform oil-water system with a normal instead of inverted oil-water relationship.Seismic attributes of intervals with well-developed coal beds reveals that the previously interpreted major faults are artifacts resulted from seismic reflection of the coal seams,and no large faults are developed in the Sangonghe Formation,no fault-sealing trap conditions exist.Hydrocarbon accumulation conditions and distribution characteristics are different in J1s2(1)(the upper second member of the Jurassic Sangonghe Formation) and J1s2(2) reservoirs.The J1s2(1) reservoirs are developed in underwater distributary channel sandbodies of meandering river deltaic front facies,with the favorable reservoirs laterally being in strip distribution.In contrast,the J1s2(2) reservoirs are developed in distributary channel sandbodies of braided river delta facies,with the favorable reservoirs laterally in continuous distribution.The Moxizhuang oilfield is a structural-lithologic reservoir that is controlled by both structure and sedimentary microfacies and is still in the post-tilting dynamic adjusting process.There exists a uniform oil-water contact in J1s2(2) with occurrence the same as that of the up-dipping sandbody.
This paper discusses hydrocarbon accumulation patterns of Moxizhuang oilfield of the Junggar Basin based on a comprehensive analysis of oil-water relationship,fault occurrence and hydrocarbon accumulation background.The reservoir of J1s2(2)(the lower second member of the Jurassic Sangonghe Formation) in Moxizhuang oilfield has a uniform oil-water system with a normal instead of inverted oil-water relationship.Seismic attributes of intervals with well-developed coal beds reveals that the previously interpreted major faults are artifacts resulted from seismic reflection of the coal seams,and no large faults are developed in the Sangonghe Formation,no fault-sealing trap conditions exist.Hydrocarbon accumulation conditions and distribution characteristics are different in J1s2(1)(the upper second member of the Jurassic Sangonghe Formation) and J1s2(2) reservoirs.The J1s2(1) reservoirs are developed in underwater distributary channel sandbodies of meandering river deltaic front facies,with the favorable reservoirs laterally being in strip distribution.In contrast,the J1s2(2) reservoirs are developed in distributary channel sandbodies of braided river delta facies,with the favorable reservoirs laterally in continuous distribution.The Moxizhuang oilfield is a structural-lithologic reservoir that is controlled by both structure and sedimentary microfacies and is still in the post-tilting dynamic adjusting process.There exists a uniform oil-water contact in J1s2(2) with occurrence the same as that of the up-dipping sandbody.
引文
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[11]陈轩,张昌民,张尚锋,等.准噶尔盆地红车断裂带岩性地层油气藏勘探新思路[J].石油与天然气地质,2010,31(4):420-427.Chen Xuan,Zhang Changmin,Zhang Shangfeng,et al.Anewapproach to the exploration of lithologic stratigraphic reservoirsin the Hong-Che fault belt in the Junggar Basin[J].Oil&GasGeology,2010,31(4):410-419.
[12]高小康,胡文宣,曹剑,等.准噶尔盆地莫索湾—莫北地区油气运移方向和成藏体系[J].石油与天然气地质,2007,28(2):250-256.Gao Xiaokang,Hu Wenxuan,Cao Jian,et al.Study of hydro-carbon migration and accumulation in the Mosuowan-Mobei are-a in Junggar basin[J].Oil&Gas Geology,2007,28(2):250-256.
[13]朱允辉,王离迟,张福顺.永进地区隐蔽油气藏成藏主控因素[J].天然气工业,2008,28(5):28-31.Zhu yunhui,Wang lichi,Zhang fushun.Main factors control-ling hydrocarbon pooling in subtle reservoirs in yongjin aera inthe Junggar basin[J].Natura Gas Industry,2008,28(5):28-31.
[14]张福顺,余滢帆,朱允辉,等.车—莫古隆起形成演化与油气分布[J].中国西部油气地质,2007,3(1):9-16.Zhang Fushun,Yu Yingfan,Zhu Yunhui,et al.Tectonic Evo-lution of Chepaizi-Mosuowan Paleo-uplift and its hydrocarbondistribution[J].West China Petrleumgesciences,2007,3(1):9-16.
[15]韩立国,张枝焕,李伟.准噶尔盆地中部Ⅰ区块现今油气运移方向研究[J].地球学报,2006,27(4):335-340.Han Liguo,Zhang Zhihuan,Li Wei.An analysis of the presentoil migration direction of block I in central Junggar Basin[J].Acta Gescientica Sinica,2006,27(4):335-340.
[2]蔡希源,刘传虎.准噶尔盆地腹部地区油气成藏的主控因素[J].石油学报,2005,26(5):1-4.Cai XiYuan,Liu ChuanHu.Main factors for controlling forma-tion of oil-gas reservoir in central part of Junggar basin[J].Acta Petrolei Sinica,2005,26(5):1-4.
[3]何登发,翟光明,况军,等.准噶尔盆地古隆起的分布与基本特征[J].地质科学,2005,40(2):248-262.He Dengfa,Zhai Guangming,Kuang Jun,et al.Distributionand tectonic features of Paleo-uplifts in the Junggar basin[J].Chinese Journal of Geology,2005,40(2):248-262.
[4]贾庆素,尹伟,陈发景,等.准噶尔盆地中部车—莫古隆起控藏作用分析[J].石油与天然气地质,2007,28(2):257-265.Jia Qingsu,Yin Wei,Chen Fajing,et al.The role of Che-Mopalaeohigh in controlling hydrocarbon accumulation in centralJuggar basin[J].Oil&Gas Geology,2007,28(2):257-265.
[5]张年富.准噶尔盆地腹部莫索湾地区油气成藏条件与成藏模式[J].石油勘探与开发,2000,27(3):17-20.ZhangNianfu.Fluid compartment and hydrocarbon accumulationin Mosuowan area in central part of Junggar basin[J].PetroeumExploration and Develpment,2000,27(3):17-20.
[6]吴金才,孟闲龙,王离迟,等.准噶尔盆地腹部隐蔽油气藏及勘探思路[J].石油与天然气地质,2004,25(6):682-685.Wu Jincai,Meng Xianlong,Wang Lichi,et al.Characteristicsof subtle oil-gas reservoirs and exploration strategy in centralJunggar basin[J].Oil&Gas Geology,2004,25(6):682-685.
[7]邹华耀,郝芳,张柏桥,等.准噶尔盆地腹部油气充注与再次运移研究[J].地质科学,2005,40(4):499-509.Zou Huayao,Hao Fang,Zhang Boqiao,et al.History of hydro-carbon filling and rem igrating in hinterland of the Junggar basin[J].Chinese Journal of Geology,2005,40(4):499-509.
[8]张年富,张越迁,姚新玉,等.准噶尔盆地莫北凸起油气成藏条件与分布规律[J].新疆石油地质,2001,22(2):103-106.Zhang Nianfu,Zhang Yueqing,Yao Xinyu,et al.Formationcondition and distribution regularity of oil-gas reservoir of Mobeiarch in Junggar basin[J].XJPG,2001,22(2):103-106.
[9]武恒志,孟闲龙,杨江峰.准噶尔盆地腹部车—莫古隆起区隐蔽油气藏形成条件与勘探技术[J].石油与天然气地质,2006,27(6):779-785.Wu Hengzhi,Meng Xianlong,Yang Jiangfeng.Formation con-ditions and prospecting technologies for subtle reservoirs in theChe-Mo palaeohigh of central Junggar ba sin[J].Oil&GasGeology,2006,27(6):779-785.
[10]徐志诚.准噶尔盆地侏罗系地层和岩性油气藏形成条件及勘探前景[J].油气地质与采收率,2005,12(5):27-29.Xu Zhicheng.The formation condition and exploration prospectof stratigraphic and lithologic oil-gas reservoirs of Jurassic inJunggar basin[J].Petroleum Geology and Recovery Efficiency,2005,12(5):27-29.
[11]陈轩,张昌民,张尚锋,等.准噶尔盆地红车断裂带岩性地层油气藏勘探新思路[J].石油与天然气地质,2010,31(4):420-427.Chen Xuan,Zhang Changmin,Zhang Shangfeng,et al.Anewapproach to the exploration of lithologic stratigraphic reservoirsin the Hong-Che fault belt in the Junggar Basin[J].Oil&GasGeology,2010,31(4):410-419.
[12]高小康,胡文宣,曹剑,等.准噶尔盆地莫索湾—莫北地区油气运移方向和成藏体系[J].石油与天然气地质,2007,28(2):250-256.Gao Xiaokang,Hu Wenxuan,Cao Jian,et al.Study of hydro-carbon migration and accumulation in the Mosuowan-Mobei are-a in Junggar basin[J].Oil&Gas Geology,2007,28(2):250-256.
[13]朱允辉,王离迟,张福顺.永进地区隐蔽油气藏成藏主控因素[J].天然气工业,2008,28(5):28-31.Zhu yunhui,Wang lichi,Zhang fushun.Main factors control-ling hydrocarbon pooling in subtle reservoirs in yongjin aera inthe Junggar basin[J].Natura Gas Industry,2008,28(5):28-31.
[14]张福顺,余滢帆,朱允辉,等.车—莫古隆起形成演化与油气分布[J].中国西部油气地质,2007,3(1):9-16.Zhang Fushun,Yu Yingfan,Zhu Yunhui,et al.Tectonic Evo-lution of Chepaizi-Mosuowan Paleo-uplift and its hydrocarbondistribution[J].West China Petrleumgesciences,2007,3(1):9-16.
[15]韩立国,张枝焕,李伟.准噶尔盆地中部Ⅰ区块现今油气运移方向研究[J].地球学报,2006,27(4):335-340.Han Liguo,Zhang Zhihuan,Li Wei.An analysis of the presentoil migration direction of block I in central Junggar Basin[J].Acta Gescientica Sinica,2006,27(4):335-340.
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