致密砂岩地震预测在水平井轨迹设计中的应用
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摘要
鄂尔多斯盆地大牛地气田二叠系下石盒子组一段(盒一段)属于典型的辫状河道沉积,砂岩较厚,气层分布存在着较强的非均质性,气藏的水平井开发难度较大。为了提高致密砂岩气藏储层"甜点"钻遇成功率,在高分辨率层序地层和沉积体系分析的基础上,明确了盒一段辫状河道沉积相展布规律及沉积特征,提出了综合应用三维地震资料解释、地震波形分析、AVO含气检测及地质统计学反演等地震预测成果设计水平井轨迹的技术方法。其中,AVO负梯度异常和地质统计学反演等地球物理预测技术发挥了特别重要的作用,为大牛地致密砂岩气藏水平井开发提供了技术支持。层序地层理论和有效的地球物理预测方法结合是提高致密砂岩气藏储层"甜点"钻遇成功率的理想途径。
The 1st member of Permian Xiashihezi Formation(He-1) in Daniudi gas field,Ordos Basin,is braided channel deposits with large thickness.As heterogeneity of the gas layer distribution is strong,development of the gas reservoirs with horizontal wells is difficult.In order to increase the success rate of drilling"sweet spot"in this tight sandstone layer,we studied in detail the sedimentary facies and characteristics of the braided channel deposits in He-1 based on analyses of high resolution sequence stratigraphy and sedimentary system,and presented methods to integrate various seismic data into design of horizontal well trajectory,such as 3D seismic interpretation,waveform analysis,AVO gas detection and geo-statistical inversion.Among these seismic data,negative AVO gradient and geo-statistics inversion are the most important and can provide strong technical support to the development of the tight sand gas reservoirs with horizontal wells in Dajiudi gas field.The integration of sequence stratigraphy theory with geophysical prediction methods is an effective way to improve the success rate of "sweet spot"drilling in tight gas sandstone reservoirs.
The 1st member of Permian Xiashihezi Formation(He-1) in Daniudi gas field,Ordos Basin,is braided channel deposits with large thickness.As heterogeneity of the gas layer distribution is strong,development of the gas reservoirs with horizontal wells is difficult.In order to increase the success rate of drilling"sweet spot"in this tight sandstone layer,we studied in detail the sedimentary facies and characteristics of the braided channel deposits in He-1 based on analyses of high resolution sequence stratigraphy and sedimentary system,and presented methods to integrate various seismic data into design of horizontal well trajectory,such as 3D seismic interpretation,waveform analysis,AVO gas detection and geo-statistical inversion.Among these seismic data,negative AVO gradient and geo-statistics inversion are the most important and can provide strong technical support to the development of the tight sand gas reservoirs with horizontal wells in Dajiudi gas field.The integration of sequence stratigraphy theory with geophysical prediction methods is an effective way to improve the success rate of "sweet spot"drilling in tight gas sandstone reservoirs.
引文
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[9]李明,侯连华,邹才能,等.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,2005:74-93.Li Ming,Hou Lianhua,Zou Caineng,et al.Technology and appli-cation of geophysical exploration in lithostratigraphic reservoir[M].BeiJing:Petroleum Industry Press,2005:74-93.
[10]吴因业,邹才能,胡素云,等.全球前陆盆地层序沉积学新进展[J].石油与天然气地质,2011,32(4):606-614.Wu Yinye,Zou Caineng,Hu Suyun,et al.New advances in sedimentology and sequence stratigraphy of foreland basin[J].Oil&Gas Geology,2011,32(4):606-614.
[11]朱筱敏,董艳蕾,胡廷惠,等.精细层序地层格架与地震沉积学研究——以泌阳凹陷核桃园组为例[J].石油与天然气地质,2011,32(4):615-624.Zhu Xiaomin,Dong Yanlei,Hu Tinghui,et al.Seismic sedimen-tology study of fine sequence stratigraphic framework:a case study of the Hetaoyuan Formation in the Biyang Sag[J].Oil&Gas Geology,2011,32(4):615-624.
[12]秦雁群,邓宏文,侯秀林,等.海拉尔盆地乌尔逊凹陷北部高分辨率层序地层与储层预测[J].石油与天然气地质,2011,32(2):214-221,228.Qin Yanqun,Deng Hongwen,Hou Xiulin,et al.High resolution sequence stratigraphy and reservoir prediction of northern Wuerxun Sag,the Hailar Basin[J].Oil&Gas Geology,2009,30(2):214-221,228.
[13]许杰,董宁,宁俊瑞,等.鄂尔多斯盆地大牛地气田盒3段辫状河道沉积相预测[J].岩性油气藏,2011,23(2):90-94.Xu Jie,Dong Ning,Ning Junrui,et al.Sedimentary facies predic-tion of braided channel of the third member of Shihezi Formation in Daniudi gasfield,Ordos Basin[J].Lithologic Reservoirs,2011,23(2):90-94.
[14]李宗杰.塔河油田碳酸盐岩油藏水平井部署方法[J].石油物探,2003,42(4):478-479.Li Zongjie.Methods of disposing horizontal wells in carbonate reservoir in Tahe Oilfield[J].Geophysical Prospecting for Pe-troleum,2003,42(4):478-479.
[2]王代国.鄂尔多斯盆地塔巴庙地区二叠系下石盒子组盒1段砂岩成岩相与储集性能关系[J].地球科学与环境学报,2006,28(1):32-36.Wang Daiguo.Diagenetic facies and reservoir capability of p 1 x1 sandstone in Tabamiao area of Ordos Basin[J].Journal of Earth Sciences and Environment,2006,28(1):32-36.
[3]孙玉平,陆家亮,巩玉政,等.我国气藏水平井技术应用综述[J].天然气技术与经济,2011,5(1):24-27.Sun Yuping,Lu Jialiang,Gong Yuzheng,et al.Review and sug-gestion on application of horizontal-well technology to gas reser-voirs in China[J].Natural Gas Technology and Economy,2011,5(1):24-27.
[4]刘迪仁,谢伟彪,殷秋丽.水平井不平整界面地层中感应测井模拟及影响分析[J].石油物探,2012,51(1):86-90,97.Liu Diren,Xie Weibiao,Yin Qiuli.Simulation and analysis on induction logging of the formation with uneven boundary in horizontal well[J].Geophysical Prospecting for Petroleum,2012,51(1):86-90.
[5]史学东,吴修国,刘俊方.短半径水平井侧钻技术在沙特HRDH-128井中的应用[J].断块油气田,2011,18(5):672-674.Shi Xuedong,Wu Xiuguo,Liu Junfang.Application of short ra-dius horizontal sidetracking technology in Well HRDH-128of Saudi Arabia[J].Fault-Block Oil&Gas Field,2011,18(5):672-674.
[6]肖晖,吴小斌,何丹,等.鄂尔多斯盆地镇川地区长3低渗储层特征及其控制因素[J].断块油气田,2011,18(6):701-704.Xiao Hui,Wu Xiaobin,He Dan,et al.Characteristics and con-trol factors of Chang3reservoir with low permeability in Zhen-chuan Area,Ordos Basin[J].Fault-Block Oil&Gas Field,2011,18(6):701-704.
[7]彭才,张延充,梅燕,等.川中地区飞仙关组高能鲕滩储层地震预测[J].石油物探,2010,49(5):504-508.Peng Cai,Zhang Yanchong,Mei Yan,et al.Seismic prediction on high-energy oolitic-beach reservoir of Feixianguan Formation in central Sichuan Basin[J].Geophysical Prospecting for Pe-troleum,2010,49(5):504-508.
[8]刘建生,邓传伟.宁晋断裂陡坡带近岸水下扇体储层的地震预测[J].石油物探,2010,49(4):380-383.Liu Jiansheng,Deng Chuanwei.Seismic prediction of near-shore underwater fan reservoir in Ningjin fractured steep slope belt[J].Geophysical Prospecting for Petroleum,2010,49(4):380-383.
[9]李明,侯连华,邹才能,等.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,2005:74-93.Li Ming,Hou Lianhua,Zou Caineng,et al.Technology and appli-cation of geophysical exploration in lithostratigraphic reservoir[M].BeiJing:Petroleum Industry Press,2005:74-93.
[10]吴因业,邹才能,胡素云,等.全球前陆盆地层序沉积学新进展[J].石油与天然气地质,2011,32(4):606-614.Wu Yinye,Zou Caineng,Hu Suyun,et al.New advances in sedimentology and sequence stratigraphy of foreland basin[J].Oil&Gas Geology,2011,32(4):606-614.
[11]朱筱敏,董艳蕾,胡廷惠,等.精细层序地层格架与地震沉积学研究——以泌阳凹陷核桃园组为例[J].石油与天然气地质,2011,32(4):615-624.Zhu Xiaomin,Dong Yanlei,Hu Tinghui,et al.Seismic sedimen-tology study of fine sequence stratigraphic framework:a case study of the Hetaoyuan Formation in the Biyang Sag[J].Oil&Gas Geology,2011,32(4):615-624.
[12]秦雁群,邓宏文,侯秀林,等.海拉尔盆地乌尔逊凹陷北部高分辨率层序地层与储层预测[J].石油与天然气地质,2011,32(2):214-221,228.Qin Yanqun,Deng Hongwen,Hou Xiulin,et al.High resolution sequence stratigraphy and reservoir prediction of northern Wuerxun Sag,the Hailar Basin[J].Oil&Gas Geology,2009,30(2):214-221,228.
[13]许杰,董宁,宁俊瑞,等.鄂尔多斯盆地大牛地气田盒3段辫状河道沉积相预测[J].岩性油气藏,2011,23(2):90-94.Xu Jie,Dong Ning,Ning Junrui,et al.Sedimentary facies predic-tion of braided channel of the third member of Shihezi Formation in Daniudi gasfield,Ordos Basin[J].Lithologic Reservoirs,2011,23(2):90-94.
[14]李宗杰.塔河油田碳酸盐岩油藏水平井部署方法[J].石油物探,2003,42(4):478-479.Li Zongjie.Methods of disposing horizontal wells in carbonate reservoir in Tahe Oilfield[J].Geophysical Prospecting for Pe-troleum,2003,42(4):478-479.
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