准噶尔盆地莫北油气藏主控因素再认识
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摘要
针对制约莫北油气藏油气储量扩展主控因素的关键问题开展研究,发现早期勘探中没有认识到低孔渗、强敏感性储层特点,未采取有效的油气层保护措施,低孔渗和高粘土矿物含量导致测井评价不准确,是漏失油气层的主要原因。在消除影响油气层测井评价的岩性、物性等因素后,建立了能够正确评价油气层的图版,新发现26井36层漏失油气层;提出燕山期弧形断裂对侏罗系三工河组二段砂泥互层中的油气起侧向封堵作用;前期采集的大面元地震资料不能满足较小断层的识别和精细刻画,采用新采集的高分辨率三维地震资料,通过叠前深度偏移、储层预测、等时格架下的变速成图等技术,搞清了砂体和弧形断裂分布,从测井重新评价发现的漏失油气层出发,指出在油气运聚方向上的弧形断裂和有利沉积微相带耦合形成油气聚集有利区,通过老井重新试油和新钻井实现储量扩展。勘探证实该方法可行、成效明显,使莫北油气藏储量扩展了近3倍。该方法对类似地区的精细勘探和油气储量扩展有一定的借鉴作用。
This paper studies the main factors influencing reserve growth,of the Mobei oil/gas reservoir.Many oil/gas layers were not identified during the early exploration period due to several reasons.The first is that no effective measures were applied to protect the oil/gas layers with low permeability and porosity and strong sensitivity.The second is that the low permeability and porosity and high clay content lowered the accuracy of log interpretation.After eliminating the impacts of lithology,physical properties and other factors on logging evaluation of oil/gas reservoirs,we established board charts to evaluate the reservoir properly.Based on this,we found 36 new oil/gas layers being neglected before in well 26.The Yanshan arc fault acts as the lateral seal for the interbeded sandstone and shale reservoirs in the 2nd member of the Lower Jurassic Sangonghe Formation.As the large-bin seismic data acquired before cannot meet the requirements of identification and fine description of small faults,the new high resolution 3D seismic data were used to delineate the sandbodies and arc fault through prestack depth migration,reservoir prediction and variable velocity mapping under an isochronous sequence framework.The coupling of favorable sedimentary microfacies with the arc fault in the directions of hydrocarbon migration and accumulation can result in the formation of favorable plays.Therefore,reserve growth can be rea-lized through re-performing formation test in old wells and drilling new wells.The reserves of Mobei oil/gas re-servoir grow by near 3 fold after this method was applied.It also can be used in similar oil/gas fields.
This paper studies the main factors influencing reserve growth,of the Mobei oil/gas reservoir.Many oil/gas layers were not identified during the early exploration period due to several reasons.The first is that no effective measures were applied to protect the oil/gas layers with low permeability and porosity and strong sensitivity.The second is that the low permeability and porosity and high clay content lowered the accuracy of log interpretation.After eliminating the impacts of lithology,physical properties and other factors on logging evaluation of oil/gas reservoirs,we established board charts to evaluate the reservoir properly.Based on this,we found 36 new oil/gas layers being neglected before in well 26.The Yanshan arc fault acts as the lateral seal for the interbeded sandstone and shale reservoirs in the 2nd member of the Lower Jurassic Sangonghe Formation.As the large-bin seismic data acquired before cannot meet the requirements of identification and fine description of small faults,the new high resolution 3D seismic data were used to delineate the sandbodies and arc fault through prestack depth migration,reservoir prediction and variable velocity mapping under an isochronous sequence framework.The coupling of favorable sedimentary microfacies with the arc fault in the directions of hydrocarbon migration and accumulation can result in the formation of favorable plays.Therefore,reserve growth can be rea-lized through re-performing formation test in old wells and drilling new wells.The reserves of Mobei oil/gas re-servoir grow by near 3 fold after this method was applied.It also can be used in similar oil/gas fields.
引文
[1]侯连华,邹才能,匡立春,等.准噶尔盆地西北缘克-百断裂带石炭系油气成藏控制因素新认识[J].石油学报,2009,30(4):513-518.Hou Lianhua,Zou Caineng,Kuang Lichun,et al.Discussion oncontrolling factors for Carboniferous hydrocarbon accumulationin the Ke-Bai fractured zone of the northwestern margin inJunggar Basin[J].Acta Petrolei Sinica,2009,30(4):513-518.
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[6]郭元岭,蒋有录,赵乐强,等.成熟探区油气勘探资源接替战略方法研究[J].石油学报,2007,28(1):20-26.Guo Yuanling,Jiang Youlu,Zhao Leqiang,et al.Methods forpetroleum exploration resource replacement strategy research inmature exploration area[J].Acta Petrolei Sinica,2007,28(1):20-26.
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[8]宋传春,彭勇民,乔玉雷,等.准噶尔盆地中国石化探区油气勘探方向探讨[J].石油与天然气地质,2008,29(4):453-459.Song Chuanchun,Peng Yongmin,Qiao Yulei,et al.Directionfor future oil&gas exploration in SINOPEC’S exploration areain the Junggar Basin[J].Oil&Gas Geology,2008,29(4):453-459.
[9]尹伟,郑和荣,徐士林,等.准噶尔盆地中央坳陷带油气成藏过程分析[J].石油与天然气地质,2009,29(4):444-451.Yin Wei,Zheng Herong,Xu Shili,et al.An analysis on theprocess of hydrocarbon accumulation in the central depressionbelt of the Junggar Basin[J].Oil&Gas Geology,2008,29(4):444-451.
[10]彭勇民,宋传春,欧方军,等.准噶尔盆地腹部地区侏罗系沉积体系展布[J].新疆石油地质,2008,26(3):265-269.Peng Yongmin,Song Chuanchun,Ou Fangjun,et al.Distrub-tions of Jurassic depositionnal sysytems in the inland region ofJunggar Basin[J].Xinjiang Petroleum Geology,2008,26(3):265-269.
[11]王居峰,邓宏文,蔡希源.准噶尔盆地中部侏罗系层序地层格架[J].石油勘探与开发,2005,32(1):23-26.Wang Jufeng,Deng Hongwen,Cai Xiyuan.Jurassic sequencestratigraphic frames in the middle Juggar Basin[J].PetroleumExploration and Development,2005,32(1):23-26.
[12]朱筱敏,张义娜,杨俊生,等.准噶尔盆地侏罗系辫状河三角洲沉积特征[J].石油与天然气地质,2009,29(2):244-251.Zhu Xiaomin,Zhang Yina,Yang Junshen,et al.Sedimentarycharacteristics of the shallow Jurassic braided river delta,theJunggar Basin[J].Oil&Gas Geology,2008,29(2):244-251.
[13]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 ge-netic mechanism of Chepaizi-Mosuowan uplift in Junggar Basin[J].Earth Science Frontiers,2008,15(4):42-55.
[14]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.Provenancesediments and its exploration significance-a case fromMember1 ofQingshuihe Formation of Lower Cretaceous in Juggar Basin[J].Earth Science Frontiers,2009,16(6):337-348.
[15]何登发,李德生,童晓光,等.多期叠加盆地古隆起控油规律[J].石油学报,2008,29(4):475-488.He Dengfa,Li Desheng,Tong Xiaoguang,et al.Accumulationand distribution of oil and gas controlled by paleo-uplift in poly-history superimposed basin[J],Acta Petrolei Sinica,2008,29(4):475-488.
[16]谭明友,张云银,宋传春,等.准噶尔盆地油气幕式成藏规律探讨[J].石油勘探与开发,2004,31(1):28-31.Tan Mingyou,Zhang Yunyin,Song Chuanchun,et al.Episodicreservoir-formation rules in the Jungar Basin,Northwest China[J].Petroleum Exploration and Development,2004,31(1):28-31.
[17]董云鹏,查显峰,付明庆,等.秦岭南缘大巴山褶皱一冲断推覆构造的特征[J],地质通报,2008,27(9):1493-1508.Dong Yunpeng,Zha Xianfeng,Fu Mingqing,et al.Characteris-tics of the Dabashan fold-thrust nappe structure at the southernmargin of the Qinling,China[J].Geological Bulletin of China,2008,27(9):1493-1508.
[18]姜林,宋岩,查明,等.准噶尔盆地莫索湾地区地层水研究[J].石油与天然气地质,2009,29(1):72-77.Jiang Lin,Song Yan,Zha Ming,et al.Study on formation waterin Mosuowan area of the Jungger Basin[J].Oil&Gas Geolo-gy,2009,29(1):72-77.
[19]杨智,何生,何治亮,等.准噶尔盆地腹部超压层分布与油气成藏[J].石油学报,2008,29(2):199-212.Yang Zhi,He Sheng,He Zhiliang,et al.Distribution of over-pressure hydrocarbon accumulation in stratum and its relation-ship with the central part of Junggar Basin[J].Acta PetroleiSinica,2008,29(2):199-212.
[2]侯连华,邹才能,匡立春,等.老油气区精细勘探潜力与方法技术[J].石油与天然气地质,2009,30(1):108-115.Hou Lianhua,Zou Caineng,Kuang Lichun,et al.Potential andtechnologies of refined exploration in mature oil and gas regions[J].Oil&Gas Geology,2009,30(1):108-115.
[3]刘磊.准噶尔盆地车排子地区滚动勘探开发技术[J].石油勘探与开发,2009,36(5):569-574.Liu Lei.Progressing exploration and development technique ofChepaizi area in Junggar Basin,NW China[J].Petroleum Ex-ploration and Development,2009,36(5):569-574.
[4]张善文.“跳出框框”是老油区找油的关键[J].石油勘探与开发,2004,31(1):12-14.Zhang Shanwen.A key idea for finding oils in an area of highdeveloped[J].Petroleum Exploration and Development,2004,31(1):12-14.
[5]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.A newapproach to the exploration of lithologic stratigraphic reservoirsin the Hong-Che fault belt,the Junggar Basin[J].Oil&GasGeology,2010,31(4):420-427.
[6]郭元岭,蒋有录,赵乐强,等.成熟探区油气勘探资源接替战略方法研究[J].石油学报,2007,28(1):20-26.Guo Yuanling,Jiang Youlu,Zhao Leqiang,et al.Methods forpetroleum exploration resource replacement strategy research inmature exploration area[J].Acta Petrolei Sinica,2007,28(1):20-26.
[7]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):1-9.Cai Xiyuan,Liu Chuanhu.Main factors for controlling formationof oil-gas reservoir in central part of Junggar Basin[J].ActaPetrolei Sinica,2005,26(5):1-9.
[8]宋传春,彭勇民,乔玉雷,等.准噶尔盆地中国石化探区油气勘探方向探讨[J].石油与天然气地质,2008,29(4):453-459.Song Chuanchun,Peng Yongmin,Qiao Yulei,et al.Directionfor future oil&gas exploration in SINOPEC’S exploration areain the Junggar Basin[J].Oil&Gas Geology,2008,29(4):453-459.
[9]尹伟,郑和荣,徐士林,等.准噶尔盆地中央坳陷带油气成藏过程分析[J].石油与天然气地质,2009,29(4):444-451.Yin Wei,Zheng Herong,Xu Shili,et al.An analysis on theprocess of hydrocarbon accumulation in the central depressionbelt of the Junggar Basin[J].Oil&Gas Geology,2008,29(4):444-451.
[10]彭勇民,宋传春,欧方军,等.准噶尔盆地腹部地区侏罗系沉积体系展布[J].新疆石油地质,2008,26(3):265-269.Peng Yongmin,Song Chuanchun,Ou Fangjun,et al.Distrub-tions of Jurassic depositionnal sysytems in the inland region ofJunggar Basin[J].Xinjiang Petroleum Geology,2008,26(3):265-269.
[11]王居峰,邓宏文,蔡希源.准噶尔盆地中部侏罗系层序地层格架[J].石油勘探与开发,2005,32(1):23-26.Wang Jufeng,Deng Hongwen,Cai Xiyuan.Jurassic sequencestratigraphic frames in the middle Juggar Basin[J].PetroleumExploration and Development,2005,32(1):23-26.
[12]朱筱敏,张义娜,杨俊生,等.准噶尔盆地侏罗系辫状河三角洲沉积特征[J].石油与天然气地质,2009,29(2):244-251.Zhu Xiaomin,Zhang Yina,Yang Junshen,et al.Sedimentarycharacteristics of the shallow Jurassic braided river delta,theJunggar Basin[J].Oil&Gas Geology,2008,29(2):244-251.
[13]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 ge-netic mechanism of Chepaizi-Mosuowan uplift in Junggar Basin[J].Earth Science Frontiers,2008,15(4):42-55.
[14]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.Provenancesediments and its exploration significance-a case fromMember1 ofQingshuihe Formation of Lower Cretaceous in Juggar Basin[J].Earth Science Frontiers,2009,16(6):337-348.
[15]何登发,李德生,童晓光,等.多期叠加盆地古隆起控油规律[J].石油学报,2008,29(4):475-488.He Dengfa,Li Desheng,Tong Xiaoguang,et al.Accumulationand distribution of oil and gas controlled by paleo-uplift in poly-history superimposed basin[J],Acta Petrolei Sinica,2008,29(4):475-488.
[16]谭明友,张云银,宋传春,等.准噶尔盆地油气幕式成藏规律探讨[J].石油勘探与开发,2004,31(1):28-31.Tan Mingyou,Zhang Yunyin,Song Chuanchun,et al.Episodicreservoir-formation rules in the Jungar Basin,Northwest China[J].Petroleum Exploration and Development,2004,31(1):28-31.
[17]董云鹏,查显峰,付明庆,等.秦岭南缘大巴山褶皱一冲断推覆构造的特征[J],地质通报,2008,27(9):1493-1508.Dong Yunpeng,Zha Xianfeng,Fu Mingqing,et al.Characteris-tics of the Dabashan fold-thrust nappe structure at the southernmargin of the Qinling,China[J].Geological Bulletin of China,2008,27(9):1493-1508.
[18]姜林,宋岩,查明,等.准噶尔盆地莫索湾地区地层水研究[J].石油与天然气地质,2009,29(1):72-77.Jiang Lin,Song Yan,Zha Ming,et al.Study on formation waterin Mosuowan area of the Jungger Basin[J].Oil&Gas Geolo-gy,2009,29(1):72-77.
[19]杨智,何生,何治亮,等.准噶尔盆地腹部超压层分布与油气成藏[J].石油学报,2008,29(2):199-212.Yang Zhi,He Sheng,He Zhiliang,et al.Distribution of over-pressure hydrocarbon accumulation in stratum and its relation-ship with the central part of Junggar Basin[J].Acta PetroleiSinica,2008,29(2):199-212.
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