叠前反演坐标转换技术在惠州凹陷地层岩性圈闭评价中的应用
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摘要
珠江口盆地惠州凹陷勘探较为成熟,构造圈闭基本钻完,中浅层岩性圈闭研究逐渐成为勘探重点。针对岩性圈闭研究中遇到的三大难题:(1)尖灭线和断层匹配影响单个砂体的圈闭有效性问题;(2)尖灭线位置不确定难以落实圈闭规模问题;(3)多套砂体叠置情况严重难以落实圈闭有效性问题,以二次三维采集、处理数据为基础,应用叠前反演坐标转换技术解决中浅层岩性圈闭勘探难题。提出的方法和技术得到已开发油田验证,并且证实经验可以推广应用。
The exploration in Huizhou depression of the Pearl River Mouth Basin has reached a high level.As structural traps are almost drilled in the area,the study of lithological traps in the shallow and middle formation has gradually been the focus of the exploration.Three major conundrums encountered in the study of lithological traps:Firstly,whether the trap effectiveness of a single sand body could match the closed relationship between the stratigraphic overlap lines and the fault?Secondly,it is difficult to determine the trap size when the position of stratigraphic overlap lines is uncertainty.Thirdly,it is difficult to confirm the trap effectiveness when multiple sets of sand bodies are in serious superposition.Based on the twice 3 Dseismic exploration and processed data,problems encountered in the exploration of lithological traps in shallow and middle formations are successfully solved by applying the pre-stack inversion coordinate conversion technology.The proposed methods and techniques have been developed for oil field verification,and proven experience can be extended to applications.
The exploration in Huizhou depression of the Pearl River Mouth Basin has reached a high level.As structural traps are almost drilled in the area,the study of lithological traps in the shallow and middle formation has gradually been the focus of the exploration.Three major conundrums encountered in the study of lithological traps:Firstly,whether the trap effectiveness of a single sand body could match the closed relationship between the stratigraphic overlap lines and the fault?Secondly,it is difficult to determine the trap size when the position of stratigraphic overlap lines is uncertainty.Thirdly,it is difficult to confirm the trap effectiveness when multiple sets of sand bodies are in serious superposition.Based on the twice 3 Dseismic exploration and processed data,problems encountered in the exploration of lithological traps in shallow and middle formations are successfully solved by applying the pre-stack inversion coordinate conversion technology.The proposed methods and techniques have been developed for oil field verification,and proven experience can be extended to applications.
引文
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[2]张永江,轩义华,秦成岗.岩石物理分析在番禺天然气区含气性研究中的应用[J].石油物探,2010,49(4):407-414.ZHANG Y J,XUAN Y H,QIN C G.Application of petrophysical analysis for gas-bearing prediction of Panyu gasfield[J].Geophysical Prospecting for Petroleum,2010,49(4):407-414.(In Chinese)
[3]张建林,吴胜和,武军昌,等.应用随机模拟方法预测岩性圈闭[J].石油勘探与开发,2003,30(3):114-116.ZHANG J L,WU S H,WU J C,et al.Prediction of lithologic traps using stochastic simulation[J].Petroleum Exploration and Development,2003,30(3):114-116.(In Chinese)
[4]闫奎邦,李冬梅,吴小泉.Jason反演技术在岩性圈闭识别中的应用[J].石油物探,2004,43(1):54-57.YAN K B,LI D M,WU X Q.Lithologic traps and lithologic reservoirs exploration in continental basins[J].Geophysical Prospecting For Petrole,2004,43(1):54-57.(In Chinese)
[5]杨占龙,陈启林.岩性圈闭与陆相盆地岩性油气藏勘探[J].天然气地球科学,2006,17(5):616-621.YANG Z L,CHEN Q L.Lithologic traps and lithologic reservoirs exploration in continental basins[J].Natural Gas Geoscience,2006,17(5):616-621.(In Chinese)
[6]胡晓兰,樊太亮,王宏语,等.隐蔽油气藏勘探理论体系再认识[J].天然气地球科学,2010,21(6):996-1003.HU X L,FAN T L,WANG H Y,et al.Recognition of theoretical system of subtle reservoirs exploration[J].Natural Gas Geoscience,2010,21(6):996-1003.(In Chinese)
[7]杜家元,陈维涛,张昌民.珠江口盆地新近系地层岩性圈闭形成条件及发育规律分析[J].石油实验地质,2014(5):555-561.DU J Y,CHEN W T,ZHANG C M.Formation conditions and development features of Neogene stratigraphic-lithologic traps in Pearl river mouth basin[J].Petroleum Geology&Experiment,2006(5):555-561.(In Chinese)
[8]陈维涛,杜家元,龙更生,等.珠江口盆地惠州地区珠江组控砂机制及地层-岩性圈闭发育模式[J].石油与天然气地质,2012,33(3):449-458.CHEN W T,DU J Y,LONG G S,et al.Factors controlling sandbody development and models of stratigraphic-lithologic traps of Zhujiang Formation in Huizhou area,Pearl River Mouth basin[J].Oil&Gas Geology,2012,33(3):449-458.(In Chinese)
[9]罗伟,刘铮,朱焕,等.探讨海底浅层生物礁及海沟对目标层构造的影响[J].物探化探计算技术,2016,38(3):388-395.LUO W,LIU Z,ZHU H,et al.To explore the effect of submarine shallow and trench on the target layer structure[J].Computing Techniques for Geophysical and Geochemical Exploration,2015,38(3):388-395.(In Chinese)
[10]杨波,张昌民,李少华,等.珠江口盆地晚渐新世--早中新世古地震记录及油气地质意义[J].天然气地球科学,2014,25(6):834-847.YANG B,ZHANG C M,LI S HA,et al.Late oligocene to early miocene paleoseismic records in pearl river mouth basin and its hydrocarbon geological significance[J].Natural Gas Geoscience,2014,25(6):834-847.(In Chinese)
[11]丁琳,张昌民,杜家元,等.珠江口盆地惠州凹陷珠江组K系列陆架砂脊沉积演化与成因[J].石油与天然气地质,2014(3):379-385.DING L,ZHANG C M,DU J Y,et al.Depositional evolution and genesis of K set of shelf sand ridges in the Zhujiang Formation of Huizhou sag,Pear River Mouth Basin[J].Oil&Gas Geology,2014(3):379-385.(In Chinese)
[12]李小平,施和生,杜家元,等.珠海组-珠江组时期东沙隆起物源提供能力探讨[J].沉积学报,2014,32(4):654-662.LI X P,SHI H S,DU J Y,et al.Capability of dongsha massif as provenance during Zhuhai-Zhujiang formations[J].Acta Sedimentologica Sinica,2014,32(4):654-662.(In Chinese)
[13]庞雄,陈长民,彭大钧,等.南海珠江深水扇系统及油气[M].北京:科学出版社,2007.PANG X,CHEN C M,PENG D J,et al.Zhujiang deep-water fan system and oil and gas in the South China Sea[M].Beijing:Science Press,2007.(In Chinese)
[14]陈长民,施和生,许仕策,等.珠江口盆地(东部)第三系油气藏形成条件[M].北京:科学出版社,2003.CHEN C M,SHI H S,XU S C,et al.Formation conditions of third series oil and gas reservoirs in the Pearl River Mouth Basin(East)[M].Beijing:Science Press,2003.(In Chinese)