鄂尔多斯盆地靖边气田的古地貌定量恢复新方法
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摘要
近年来,靖边气田在上、下古生界立体开发过程中,多次在原预测模型的侵蚀沟槽区域发现下奥陶统马五_(1+2)亚段完整,引起人们对原古地貌恢复方法的质疑。为此,综合分析现有古地貌恢复方法的优缺点,基于印模法和残厚法,提出了一种靖边气田的古地貌定量恢复新方法 :选取任意一点作为参考水平面,将该水平面至奥陶系剥蚀面的距离作为古地貌高程值,通过绘制古地貌高程图实现古地貌的定量化表征与侵蚀沟槽预测。结果表明:在靖边气田侵蚀沟槽的重新刻画中,侵蚀沟槽的展布模式由原来的"东西向树枝状沟槽模式"变为"沟槽与潜坑并存模式",且2017年完钻的8口井,有7口井的实钻结果与新方法预测的古地貌相吻合。
During 3D development of the Lower and Upper Paleozoic in Jingbian gasfield, complete Lower Ordovician Ma_5~(1+2) strata have been discovered for many times in an erosion groove area identified on the basis of previous prediction model. And this arouses some doubts about the methods to rebuild existing palaeogeomorphology. In this study, the advantages and disadvantages of existing rebuilding methods were analyzed comprehensively. Then, a new quantitatively rebuilding method suitable for Jingbian gasfield was developed based on other two approaches of both impression and residual thickness. Firstly, one point is selected arbitrarily as a reference level, and the distance between this level and Ordovician denudation surface is taken as the palaeogeomorphologic elevation. And then, quantitative characterization of palaeogeomorphology and prediction of erosion groove are realized by plotting the elevation map. It's indicated that, when this new method is applied to depict the erosion groove in Jingbian gasfield, its distribution mode is changed from "EW dendritic groove" to "groove and shallow pit coexistence". Among 8 wells drilled in 2017, 7 wells' drilling results are coincident with the palaeogeomorphology predicted by this new method.
During 3D development of the Lower and Upper Paleozoic in Jingbian gasfield, complete Lower Ordovician Ma_5~(1+2) strata have been discovered for many times in an erosion groove area identified on the basis of previous prediction model. And this arouses some doubts about the methods to rebuild existing palaeogeomorphology. In this study, the advantages and disadvantages of existing rebuilding methods were analyzed comprehensively. Then, a new quantitatively rebuilding method suitable for Jingbian gasfield was developed based on other two approaches of both impression and residual thickness. Firstly, one point is selected arbitrarily as a reference level, and the distance between this level and Ordovician denudation surface is taken as the palaeogeomorphologic elevation. And then, quantitative characterization of palaeogeomorphology and prediction of erosion groove are realized by plotting the elevation map. It's indicated that, when this new method is applied to depict the erosion groove in Jingbian gasfield, its distribution mode is changed from "EW dendritic groove" to "groove and shallow pit coexistence". Among 8 wells drilled in 2017, 7 wells' drilling results are coincident with the palaeogeomorphology predicted by this new method.
引文
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[15]杨亮.松辽盆地南部中央坳陷区扶余油层古地貌恢复及构造演化[J].世界地质,2013,32(3):564-570.Yang Liang.Paleogeomorphological restoration and tectonic evolution of Fuyu reservoir in central depression of southern Songliao Basin[J].Global Geology,2013,32(3):564-570.
[16]王鑫,李玲,余雁,卢永合,屈伟玉,王雪萍.二连盆地乌兰花凹陷古地貌恢复及构造发育史研究[J].中国石油勘探,2013,18(6):62-68.Wang Xin,Li Ling,Yu Yan,Lu Yonghe,Qu Weiyu&Wang Xueping.Study on paleogeomorphic restoring and structural development history of Wulanhua sag,Erlian basin[J].China Petroleum Exploration,2013,18(6):62-68.
[17]肖笛,谭秀成,山述娇,陈韵骐,夏吉文,杨坚,等.四川盆地南部中二叠统茅口组古岩溶地貌恢复及其石油地质意义[J].地质学报,2014,88(10):1992-2002.Xiao Di,Tan Xiucheng,Shan Shujiao,Chen Yunqi,Xia Jiwen,Yang Jian,et al.The restoration of palaeokarst geomorphology of Middle Permian Maokou Formation and its petroleum geological significance in Southern Sichuan Basin[J].Acta Geologica Sinica,2014,88(10):1992-2002.
[18]王建民,王佳媛,沙建怀,郭德郧,高海仁,聂武军,等.鄂尔多斯盆地东部奥陶系风化壳岩溶古地貌特征及综合地质模型[J].吉林大学学报(地球科学版),2014,44(2):409-418.Wang Jianmin,Wang Jiayuan,Sha Jianhuai,Guo Dexun,Gao Hairen,Nie Wujun,et al.Karst paleogeomorphology and comprehensive geological model of the Ordovician weathering crust in the Eastern Ordos Basin[J].Journal of Jilin University(Earth Science Edition),2014,44(2):409-418.
[19]郭庆,孙卫,余小雷,曾令帮,王妍.靖边气田西部地区奥陶系顶部侵蚀面解释技术[J].西北大学学报(自然科学版),2013,43(6):947-951.Guo Qing,Sun Wei,Yu Xiaolei,Zeng Lingbang&Wang Yan.Interpretation techniques of the Top Ordovician erosional surface in Jingbian Gas-field,western region of the Ordos Basin[J].Journal of Northwest University(Natural Science Edition),2013,43(6):947-951.
[20]何自新,郑聪斌,陈安宁,王飞雁.长庆气田奥陶系古沟槽展布及其对气藏的控制[J].石油学报,2001,22(4):35-38.He Zixin,Zheng Congbin,Chen Anning&Wang Feiyan.Distributive configuration of ancient valley-trough on Ordovician erosion surface in Changqing gas field and its control over gas accumulations[J].Acta Petrolei Sinica,2001,22(4):35-38.
[21]邹新宁,孙卫,张盟勃,万玉君.鄂尔多斯盆地奥陶系侵蚀沟谷及顶面形态识别[J].西北大学学报(自然科学版),2006,36(4):610-614.Zou Xinning,Sun Wei,Zhang Mengbo&Wan Yujun.Recognition of eroded channel-vale and top fluctuant configuration for Ordovician in Ordos Basin[J].Journal of Northwest University(Natural Science Edition),2006,36(4):610-614.
[2]刘志军,兰义飞,夏勇,安文宏,徐运动.靖边气田动态精细评价及水平井开发技术研究与实践[J].天然气勘探与开发,2014,37(3):37-40.Liu Zhijun,Lan Yifei,Xia Yong,An Wenhong&Xu Yundong.Dynamic evaluation and horizontal-well development technology for Jingbian gasfield[J].Natural Gas Exploration and Development,2014,37(3):37-40.
[3]韩长城,林承焰,鲁新便,魏婷,任丽华,张宪国.塔河油田奥陶系岩溶地貌对储集层的控制作用[J].新疆石油地质,2016,37(4):417-422.Han Changcheng,Lin Chengyan,Lu Xinbian,Wei Ting,Ren Lihua&Zhang Xianguo.Controlling effects of Ordovician karst paleogeomorphology on reservoirs in Tahe Oilfield,Tarim Basin[J].Xinjiang Petroleum Geology,2016,37(4):417-422.
[4]金民东,谭秀成,童明胜,曾伟,刘宏,钟波,等.四川盆地高石梯-磨溪地区灯四段岩溶古地貌恢复及地质意义[J].石油勘探与开发,2017,44(1):58-68.Jin Mindong,Tan Xiucheng,Tong Mingsheng,Zeng Wei,Liu Hong,Zhong Bo,et al.Karst paleogeomorphology of the fourth member of Sinian Dengying formation in Gaoshiti-Moxi area,Sichuan Basin,SW China:Restoration and geological significance[J].Petroleum Exploration and Development,2017,44(1):58-68.
[5]庞军刚,杨友运,李文厚,李玲,文莹.陆相含油气盆地古地貌恢复研究进展[J].西安科技大学学报,2013,33(4):424-430.Pang Jungang,Yang Youyun,Li Wenhou,Li Ling&Wen Ying.Study development of palaeogeomorphology reconstructions in continental facies hydrocarbon basin[J].Journal of Xi’an University of Science and Technology,2013,33(4):424-430.
[6]吴丽艳,陈春强,江春明,晏佳,李华,杨晓东.浅谈我国油气勘探中的古地貌恢复技术[J].石油天然气学报(江汉石油学院学报),2005,27(4):559-561.Wu Liyan,Chen Chunqiang,Jiang Chunming,Yan Jia,Li Hua&Yang Xiaodong.Paleogeomorphic Restoring Techniques in China's Hydrocarbon exploration[J].Journal of Oil and Gas Technology(Journal of Jianghan Petroleum Institute),2005,27(4):559-561.
[7]赵永刚,王东旭,冯强汉,张栋梁,王少飞,冯永玖,等.油气田古地貌恢复方法研究进展[J].地球科学与环境学报,2017,39(4):516-529.Zhao Yonggang,Wang Dongxu,Feng Qianghan,Zhang Dongliang,Wang Shaofei,Feng Yongjiu,et al.Review on palaeomorphologic reconstruction methods in oil and gas fields[J].Journal of Earth Sciences and Environment,2017,39(4):516-529.
[8]胡修权,施泽进,田亚铭,王长城.川东南地区茅口组岩溶古地貌恢复及特征[J].地质通报,2014,33(6):874-882.Hu Xiuquan,Shi Zejin,Tian Yaming&Wang Changcheng.The restoration of karst ancient landform of the Maokou Formation in southeastern Sichuan basin[J].Geological Bulletin of China,2014,33(6):874-882.
[9]刘宏,罗思聪,谭秀成,李凌,连承波,曾伟,等.四川盆地震旦系灯影组古岩溶地貌恢复及意义[J].石油勘探与开发,2015,42(3):1-11.Liu Hong,Luo Sicong,Tan Xiucheng,Li Ling,Lian Chengbo,Zeng Wei,et al.Restoration of paleokarst geomorphology of Sinian Dengying Formation in Sichuan Basin and its significance,SW China[J].Petroleum Exploration and Development,2015,42(3):1-11.
[10]刘瑞东,王宝清,王博,狄翔,郭斌,刘伟.鄂尔多斯盆地环江地区前侏罗纪古地貌恢复研究[J].石油地质与工程,2014,28(5):9-11.Liu Ruidong,Wang Baoqing,Wang Bo,Di Xiang,Guo Bin&Liu Wei.Study on pre-Jurassic palaeogeomorphology reconstruction of Huanjiang region,Ordos Basin[J].Petroleum Geology and Engineering,2014,28(5):9-11.
[11]袁珍,李文厚,朱静,郭艳琴.鄂尔多斯盆地陇东地区侏罗系古地貌恢复及其对石油聚集的影响[J].地质通报,2013,32(11):1806-1814.Yuan Zhen,Li Wenhou,Zhu Jing&Guo Yanqin.The restoration of Pre-Jurassic paleogeomorphology and its influence on oil accumulation in Longdong area[J].Geological Bulletin of China,2013,32(11):1806-1814.
[12]苗钱友,朱筱敏,李国斌,郭洪明,杨勤林,张静,等.滨里海盆地M区块晚石炭世古地貌恢复与白云岩储层预测[J].地球科学--中国地质大学学报,2014,39(7):871-879.Miao Qianyou,Zhu Xiaomin,Li Guobin,Guo Hongming,Yang Qinlin,Zhang Jing,et al.Paleogeomorphology recovery and reservoir prediction of upper Carboniferous in M block,Pre-Caspian basin[J].Earth Science-Journal of China University of Geosciences,2014,39(7):871-879.
[13]宋国奇,徐春华,樊庆真,魏艳萍,孔凡顺.应用层序地层学方法恢复加里东期古地貌--以济阳坳陷沾化地区为例[J].石油实验地质,2000,22(4):350-354.Song Guoqi,Xu Chunhua,Fan Qinzhen,Wei Yanping&Kong Fanshun.Sequence stratigraphy applied in the restoration of the Caledonian paleogeomorphology-a case study in Zhanhua area,the Jiyang depression[J].Experimental Petroleum Geology,2000,22(4):350-354.
[14]邓兴梁,佟彦明,张正红,杨品,潘杨勇,赵春段.塔中西部奥陶系碳酸盐岩潜山精细古地貌研究[J].石油天然气学报(江汉石油学院学报),2014,36(8):30-33.Deng Xingliang,Tong Yanming,Zhang Zhenghong,Yang Pin,Pan Yangyong&Zhao Chunduan.Fine study on Ordovician carbonate buried-hill palaegeomorphology in the West of Tazhong area[J].Journal of Oil and Gas Technology(Journal of Jianghan Petroleum Institute),2014,36(8):30-33.
[15]杨亮.松辽盆地南部中央坳陷区扶余油层古地貌恢复及构造演化[J].世界地质,2013,32(3):564-570.Yang Liang.Paleogeomorphological restoration and tectonic evolution of Fuyu reservoir in central depression of southern Songliao Basin[J].Global Geology,2013,32(3):564-570.
[16]王鑫,李玲,余雁,卢永合,屈伟玉,王雪萍.二连盆地乌兰花凹陷古地貌恢复及构造发育史研究[J].中国石油勘探,2013,18(6):62-68.Wang Xin,Li Ling,Yu Yan,Lu Yonghe,Qu Weiyu&Wang Xueping.Study on paleogeomorphic restoring and structural development history of Wulanhua sag,Erlian basin[J].China Petroleum Exploration,2013,18(6):62-68.
[17]肖笛,谭秀成,山述娇,陈韵骐,夏吉文,杨坚,等.四川盆地南部中二叠统茅口组古岩溶地貌恢复及其石油地质意义[J].地质学报,2014,88(10):1992-2002.Xiao Di,Tan Xiucheng,Shan Shujiao,Chen Yunqi,Xia Jiwen,Yang Jian,et al.The restoration of palaeokarst geomorphology of Middle Permian Maokou Formation and its petroleum geological significance in Southern Sichuan Basin[J].Acta Geologica Sinica,2014,88(10):1992-2002.
[18]王建民,王佳媛,沙建怀,郭德郧,高海仁,聂武军,等.鄂尔多斯盆地东部奥陶系风化壳岩溶古地貌特征及综合地质模型[J].吉林大学学报(地球科学版),2014,44(2):409-418.Wang Jianmin,Wang Jiayuan,Sha Jianhuai,Guo Dexun,Gao Hairen,Nie Wujun,et al.Karst paleogeomorphology and comprehensive geological model of the Ordovician weathering crust in the Eastern Ordos Basin[J].Journal of Jilin University(Earth Science Edition),2014,44(2):409-418.
[19]郭庆,孙卫,余小雷,曾令帮,王妍.靖边气田西部地区奥陶系顶部侵蚀面解释技术[J].西北大学学报(自然科学版),2013,43(6):947-951.Guo Qing,Sun Wei,Yu Xiaolei,Zeng Lingbang&Wang Yan.Interpretation techniques of the Top Ordovician erosional surface in Jingbian Gas-field,western region of the Ordos Basin[J].Journal of Northwest University(Natural Science Edition),2013,43(6):947-951.
[20]何自新,郑聪斌,陈安宁,王飞雁.长庆气田奥陶系古沟槽展布及其对气藏的控制[J].石油学报,2001,22(4):35-38.He Zixin,Zheng Congbin,Chen Anning&Wang Feiyan.Distributive configuration of ancient valley-trough on Ordovician erosion surface in Changqing gas field and its control over gas accumulations[J].Acta Petrolei Sinica,2001,22(4):35-38.
[21]邹新宁,孙卫,张盟勃,万玉君.鄂尔多斯盆地奥陶系侵蚀沟谷及顶面形态识别[J].西北大学学报(自然科学版),2006,36(4):610-614.Zou Xinning,Sun Wei,Zhang Mengbo&Wan Yujun.Recognition of eroded channel-vale and top fluctuant configuration for Ordovician in Ordos Basin[J].Journal of Northwest University(Natural Science Edition),2006,36(4):610-614.