Pelagian盆地C区块灰岩储层的地震识别
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摘要
北非Pelagian盆地是中、新生代含油气盆地,自侏罗系Jerba组到中新统Tazerka组均有储层发育,但下始新统顶部的货币虫滩坝灰岩是主力储集层,利比亚海上已发现储量的80%分布在货币虫灰岩储层中。Pelagian盆地C区块在构造高部位钻井2口,均因货币虫灰岩段的缺失而失利。通过正演、反演及地震多属性提取等技术手段,结合地质、钻井、测井、沉积古地貌等信息对下始新统Metlaoui群El Garia组货币虫灰岩进行了识别与预测。
Pelagian basin in North Africa is one of Meso-Cenozoic oil-gas bearing basins,which developed reservoir form Jurassic Jerba Group to Miocene Tazerka Group,but the lower Eocene Nummulite limestone is the main reservoir.From now on the oil discoveries of nummulitic limestone in Libya have been about 80% of the total reserves.It had been trilled two failed wells in the high part of the structure because of the lack of nummulitic limestone.Based on the method of forward model,inversion and seismic attribute extraction,the limestone reservoirs of the Metlaoui Group is identified in this paper.The distribution of possible nummulitic limestone reservoir rocks is also predicted in this paper,combined with the study of geology,paleogeomorphic,drilling and logging data.
Pelagian basin in North Africa is one of Meso-Cenozoic oil-gas bearing basins,which developed reservoir form Jurassic Jerba Group to Miocene Tazerka Group,but the lower Eocene Nummulite limestone is the main reservoir.From now on the oil discoveries of nummulitic limestone in Libya have been about 80% of the total reserves.It had been trilled two failed wells in the high part of the structure because of the lack of nummulitic limestone.Based on the method of forward model,inversion and seismic attribute extraction,the limestone reservoirs of the Metlaoui Group is identified in this paper.The distribution of possible nummulitic limestone reservoir rocks is also predicted in this paper,combined with the study of geology,paleogeomorphic,drilling and logging data.
引文
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[2]Su Chaoguang.Seismic identification and prediction of lacus-trine carbonate at Es4in Zhanche area[J].Oil GeophysicalPreospecting,2010,45(4):565-570.[苏朝光.沾车地区沙四段湖相碳酸盐岩的地震识别与预测[J].石油地球物理勘探,2010,45(4):565-570.]
[3]He Zhenhua,Jia Yirong,Jiang Lian,et al.Research on themethodology of carbonate reef-shoal reservoir description[J].Computing Techniques for Geophysical and Geochemical Ex-ploration,2011,33(1):1-5.[贺振华,贾义蓉,蒋炼,等.碳酸盐岩礁滩油气储层地震预测方法探讨[J].物探化探计算技术,2011,33(1):1-5.]
[4]Wu Guanghui,Huang Guangjian,Wang Zhenyu,et al.The seismicidentification and prediction of the reef in the ordovician of thecentral Tarim basin[J].Natural Gas Industry,2007,27(4):40-42.[邬光辉,黄广建,王振宇,等.塔中奥陶系生物礁地震识别与预测[J].天然气工业,2007,27(4):40-42.]
[5]He Zhenhua,Hu Guangmin,Huang Deji.Seismic identificationand corresponding strategies of tight reservoir fractured zone[J].Oil Geophysical Prospecting,2005,40(2):190-195.[贺振华,胡光岷,黄德济.致密储层裂隙发育带的地震识别及相应策略[J].石油地球物理勘探,2005,40(2):190-195.]
[6]Liu Weifang,Duan Yonghua,Gao Jianhu,et al.A method ofcarbonate reservoir identification by using post-stack seismicdata[J].Lithologic Reservoirs,2007,19(1):101-104.[刘伟方,段永华,高建虎,等.利用地震属性预测碳酸盐岩储层[J].岩性油气藏,2007,19(1):101-104.]
[7]Zeng Lingbang,Duan Yushun,Bi Mingbo,et al.Seismic identifica-tion and exploration effect of reef-bank facies reservoir in north-western Ordos basin[J].Lithologic Reservoirs,2011,23(2):75-79.[曾令邦,段玉顺,毕明波,等.鄂尔多斯盆地西北部礁滩相储层地震识别与勘探效果[J].岩性油气藏,2011,23(2):75-79.]
[8]Liu Yukui,Zheng Duoming,Wang Jianning,et al.The Ordo-vician carbonic reservoir characteristics and mineralization inYingmaili low heave of Tarim basin[J].Natural Gas Geosci-ence,2005,16(5):587-591.[刘玉魁,郑多明,王建宁,等.塔里木盆地英买力低凸起奥陶系碳酸盐岩储层特征及其成岩作用[J].天然气地球科学,2005,16(5):587-591.]
[9]Li Ming,Hou Jianhua.Geophysical Exploration Techniques andApplications on Lithological Reservoir[M].Beijing:Petroleum In-dustrial Press,2005.[李明,侯建华.岩性地层油气藏地球物理勘探技术与应用[M].北京:石油工业出版社,2005.]
[10]Cai Rui.Analysis on reflection structure and reservoir forecastin the carbonate stratum[J].Geophysical Prospecting for Pe-troleum,2006,45(1):57-61.[蔡瑞.碳酸盐岩地层反射结构分析与储层预测[J].石油物探,2006,45(1):57-61.]
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[12]Bi Changchun,Li Lianxin,Mei Yan,et al.Geological controlfactors of Changxing organic reef distribution and seismic pre-diction techniques,east Sichuan basin[J].Natural Gas Geosci-ence,2007,18(4):509-513.[毕长春,李联新,梅燕,等.川东长兴组生物礁分布控制因素及地震识别技术[J].天然气地球科学,2007,18(4):509-513.]
[13]Cai Hanpeng,He Zhenhua,Huang Deji.Application of fre-quency information to the prediction of hydrocarbon potentialin carbonate reef flat reservoirs[J].Lithologic Reservoirs,2008,20(4):113-117.[蔡涵鹏,贺振华,黄德济.频率信息在碳酸盐岩礁滩储层含油气性预测中的应用[J].岩性油气藏,2008,20(4):113-117.]
[14]Xu Guoqiang,Wu Weihang,Wu Hengzhi,et al.Seismic detec-tion and distribution of reef-bank complex in langlitage forma-tion of upper Ordovician,Hetian river area,Tarim basin[J].Journal of Mineralogy and Petrology,2006,26(2):80-86.[徐国强,吴伟航,武恒志,等.塔里木盆地和田河地区上奥陶统礁滩沉积体地震识别及其发育分布规律[J].矿物岩石,2006,26(2):80-86.]
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[16]Wang Pu,Li Guofa,Zhang Liqin,et al.Thin-layer reservoirprediction in the low Es1of the western ramp of Qikou de-pression[J].Journal of China University of Petroleum:Natu-ral Science Edition,2008,32(2):28-33.[王璞,李国发,张立勤,等.岐口凹陷西斜坡沙一段薄储层预测[J].中国石油大学学报:自然科学版,2008,32(2):28-33.]
[17]Wang Mingchun,Ming Jun.Seismic waveform classificationtechniques and application in a variable time window[J].Chi-na Offshore Oil and Gas,2011,23(5):303-306.[王明春,明君.一种变时窗地震波形分类技术及其应用[J].中国海上油气,2011,23(5):303-306.]
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