柴达木盆地三湖地区北斜坡岩性地层气藏形成的地质条件与预测技术研究
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摘要
三湖地区北斜坡褶皱发育,相变快,生储盖组合优越,具备形成岩性地层气藏的构造背景和地质条件.由于本区储层厚度薄(1~3m),缺乏三维地震资料,砂体分布难以准确追踪,导致岩性地层气藏勘探难以取得突破.已知气藏解剖和理论研究表明地层含气后会产生特殊的地震响应,通过地震异常信息研究,结合构造、沉积和成藏条件分析,发现驼西地区是岩性圈闭发育带,Tzh2井获得工业气流证明该区带具备形成岩性气区的潜力.
The north slope of the Sanhu area of the Qaidam basin,with its characteristic geologic features such as strong fold,rapid lithofacies variation,promising geologic setting,is prone to have stratigraphic and lithologic gas pools.However,as the reservoir beds are extremely thin(1～3 meters),and lack of 3D seismic data,it is very difficult to identify the sand bodies and trace them laterally,resulting in a very low discovery rate of stratigraphic-lithologic reservoirs.Studies on producing gas trap and theoretical reasoning indicate that abnormal seismic response will be observed when the reservoir is gas accumulated.As a result,based on abnormal seismic response analysis,accompanied by studies on structural,sedimentary,and accumulation conditions,the Tuoxi belt was recognized as a lithologic trap region.A well,Tzh2,drilled afterwards in this belt,showed commercial gas,indicating promising potential of lithologic gas pool in this region.
The north slope of the Sanhu area of the Qaidam basin,with its characteristic geologic features such as strong fold,rapid lithofacies variation,promising geologic setting,is prone to have stratigraphic and lithologic gas pools.However,as the reservoir beds are extremely thin(1～3 meters),and lack of 3D seismic data,it is very difficult to identify the sand bodies and trace them laterally,resulting in a very low discovery rate of stratigraphic-lithologic reservoirs.Studies on producing gas trap and theoretical reasoning indicate that abnormal seismic response will be observed when the reservoir is gas accumulated.As a result,based on abnormal seismic response analysis,accompanied by studies on structural,sedimentary,and accumulation conditions,the Tuoxi belt was recognized as a lithologic trap region.A well,Tzh2,drilled afterwards in this belt,showed commercial gas,indicating promising potential of lithologic gas pool in this region.
引文
[1]马丽娟,郑和荣,陈霞.隐蔽油气藏地震预测技术研究新进展[J].地球物理学进展,2007,22(1):294~300.Ma L J,Zheng H R,Chen X.The New progress of seismicforecast technology of Subtle Traps[J].Progress in Geophys-ics,2007,22(1):294~300.
[2]马丽娟,郑和荣,陈霞.隐蔽油气藏地震预测技术研究新进展[J].地球物理学进展,2007,22(1):294~300.Ma L J,Zheng H R,Chen X.The New progress of seismicforecast technology of Subtle Traps[J].Progress in Geophys-ics,2007,22(1),294~300.
[3]贾承造,赵文智,邹才能,等.岩性地层油气藏勘探研究的两项核心技术[J].石油勘探与开发,2004,31(3):3~9.Jia C Z,Zhao W Z,Zou C N,et al.Two key technologies aboutexploration of stratigraphic/lithological reservoirs[J].Petrole-um Exploration and Development,2004,31(3):3~9.
[4]刘震,赵政璋,赵阳,等.含油气盆地岩性油气藏的形成和分布特征[J].石油学报,2006,27(1):17~23.Liu Z,Zhao Z Z,Zhao Y,et al.Predominant characteristics offormation and distribution for lithologic reservoirs in petrolifer-ous basin[J].Acta Petrolei Sinica,2006,27(1):17~23.
[5]张明振,谭明友,王兴谋.济阳凹陷第三系隐蔽藏储层配套技术[J].地球物理学进展,2005,20(1):42~48.Zhang M Z,Tan M Y,Wang X M.Combined describing tech-niques of tertiary hidden hydrocarbon reservoir in Jiyang de-pression[J].Progress in Geophysics(in Chinese),2005,20(1):42~48.
[6]邹才能,李明,赵文智,等.松辽南部构造一岩性油气藏识别技术及应用[J].石油学报,2004,25(3):32~43.Zou C N,Li M,Zhao W Z,et al.Recognition technique and ap-plication of structure_lithology pool in the south of SongliaoBasin[J].Acta Petrolei Sinica,2004,25(3):32~43.
[7]方杰,赵力民,赵太良,等.用层序地层学构建辫状河三角洲岩性油藏地质模型[J].石油学报,2004,25(5):29~33.Fang J,Zhao L M,Zhao T L,et al.Construction of geologic modelfor lithologic oil reservoirs in braided river delta with sequence stra-tigraphy[J].Acta Petrolei Sinica,2004,25(5):29~33.
[8]张延玲,杨长春,贾曙光.地震属性技术的研究和应用[J].地球物理学进展,2005,20(4):1129~1133.Zhan Y L,Yang C C,Jia S G.The application of the seismic at-tributes[J].Progress in Geophysics,2005,20(4):1129~1133.
[9]刘豪,王英民.准噶尔盆地坳陷湖盆坡折带在非构造圈闭勘探中的应用[J].石油与天然气地质.2004,25(4):422~427.Liu H,Wang Y M.Significance of slope break zones in down-warped lake basins to exploration of non-structural traps inJunggar basin[J],Oil&Gas Geology,2004,25(4):422~427.
[10]朱筱敏,康安.柴达木盆地第四系储层特征及评价[J].天然气工业.2005,25(3):29~31.Zhu X M,Kang A.characteristics and evaliation of the qua-ternary resersolrs in Chaidamu basin[J].Natural Gas Indus-try,2005,25(3):29~31.
[11]王西文,胡自多,田彦灿,等.地震子波处理的二步法反褶积方法研究[J].地球物理学进展,2006,21(4):1167~1179.Wang X W,Hu Z D,Tian Y C,et al.Study of seismic waveletprocessing method in two step deconvolution[J].Progress inGeophysics,2006,21(4):1167~1179.
[12]尚永生,杨长春,王真理,等.柴达木盆地第四系气藏烃类检测研究[J].地球物理学进展,2007,22(3):831~835.Shang Y S,Yang C C,Wang Z L,et al.The research of hydro-carbon indicationon gas reservior of Qaidam basin[J].Pro-gress in Geophysics,2007,22(3):831~835.
[2]马丽娟,郑和荣,陈霞.隐蔽油气藏地震预测技术研究新进展[J].地球物理学进展,2007,22(1):294~300.Ma L J,Zheng H R,Chen X.The New progress of seismicforecast technology of Subtle Traps[J].Progress in Geophys-ics,2007,22(1),294~300.
[3]贾承造,赵文智,邹才能,等.岩性地层油气藏勘探研究的两项核心技术[J].石油勘探与开发,2004,31(3):3~9.Jia C Z,Zhao W Z,Zou C N,et al.Two key technologies aboutexploration of stratigraphic/lithological reservoirs[J].Petrole-um Exploration and Development,2004,31(3):3~9.
[4]刘震,赵政璋,赵阳,等.含油气盆地岩性油气藏的形成和分布特征[J].石油学报,2006,27(1):17~23.Liu Z,Zhao Z Z,Zhao Y,et al.Predominant characteristics offormation and distribution for lithologic reservoirs in petrolifer-ous basin[J].Acta Petrolei Sinica,2006,27(1):17~23.
[5]张明振,谭明友,王兴谋.济阳凹陷第三系隐蔽藏储层配套技术[J].地球物理学进展,2005,20(1):42~48.Zhang M Z,Tan M Y,Wang X M.Combined describing tech-niques of tertiary hidden hydrocarbon reservoir in Jiyang de-pression[J].Progress in Geophysics(in Chinese),2005,20(1):42~48.
[6]邹才能,李明,赵文智,等.松辽南部构造一岩性油气藏识别技术及应用[J].石油学报,2004,25(3):32~43.Zou C N,Li M,Zhao W Z,et al.Recognition technique and ap-plication of structure_lithology pool in the south of SongliaoBasin[J].Acta Petrolei Sinica,2004,25(3):32~43.
[7]方杰,赵力民,赵太良,等.用层序地层学构建辫状河三角洲岩性油藏地质模型[J].石油学报,2004,25(5):29~33.Fang J,Zhao L M,Zhao T L,et al.Construction of geologic modelfor lithologic oil reservoirs in braided river delta with sequence stra-tigraphy[J].Acta Petrolei Sinica,2004,25(5):29~33.
[8]张延玲,杨长春,贾曙光.地震属性技术的研究和应用[J].地球物理学进展,2005,20(4):1129~1133.Zhan Y L,Yang C C,Jia S G.The application of the seismic at-tributes[J].Progress in Geophysics,2005,20(4):1129~1133.
[9]刘豪,王英民.准噶尔盆地坳陷湖盆坡折带在非构造圈闭勘探中的应用[J].石油与天然气地质.2004,25(4):422~427.Liu H,Wang Y M.Significance of slope break zones in down-warped lake basins to exploration of non-structural traps inJunggar basin[J],Oil&Gas Geology,2004,25(4):422~427.
[10]朱筱敏,康安.柴达木盆地第四系储层特征及评价[J].天然气工业.2005,25(3):29~31.Zhu X M,Kang A.characteristics and evaliation of the qua-ternary resersolrs in Chaidamu basin[J].Natural Gas Indus-try,2005,25(3):29~31.
[11]王西文,胡自多,田彦灿,等.地震子波处理的二步法反褶积方法研究[J].地球物理学进展,2006,21(4):1167~1179.Wang X W,Hu Z D,Tian Y C,et al.Study of seismic waveletprocessing method in two step deconvolution[J].Progress inGeophysics,2006,21(4):1167~1179.
[12]尚永生,杨长春,王真理,等.柴达木盆地第四系气藏烃类检测研究[J].地球物理学进展,2007,22(3):831~835.Shang Y S,Yang C C,Wang Z L,et al.The research of hydro-carbon indicationon gas reservior of Qaidam basin[J].Pro-gress in Geophysics,2007,22(3):831~835.
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