鄂尔多斯盆地南部直罗油田长8油层油气沸腾包裹体群研究
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摘要
运用激光拉曼光谱、包裹体充填度测定等方法对鄂尔多斯盆地直罗油田富南3井、6井长8油层裂缝岩芯充填物中包裹体群进行分析,发现富南3井、6井与英旺油田英16井长8油层中油气沸腾包裹体群完全相同,密集分布的气泡不停晃动,证实油气沸腾包裹体群不是孤立的、偶然的地质现象。富南3井、6井和英16井长8油层裂缝岩芯的原始裂缝性质为滑动-剪切裂缝和剪切裂缝,在区域构造的作用下,反复发生拉张-挤压交替活动;在拉张发生的瞬间,与裂缝沟通的油层里的原油发生减压沸腾,原油中的轻质馏分和其他流体进入裂缝空间;在随后的挤压发生时,裂缝基本封闭,一部分流体返回原来的油层,一部分被挤到别的裂隙空间形成新的油藏;残留在裂缝里的碳酸钙,在较高的地层压力下逐渐结晶,并把残留的轻质馏分包裹,形成油气包裹体;这些油气包裹体形成压力较高,又包裹着成分类似液化气的轻质馏分,在常温常压下就处于沸腾状态;这样的过程反复进行,在裂缝充填物中形成了沿着晶体生长线以及成片、成带分布的油气沸腾包裹体群。上述油气沸腾包裹体群的形成过程就是油气的地震泵运移机制,丰富了油气运移地震泵地质模型。
By the means of laser Raman spectroscopy and filling degree of inclusion,the inclusion groups of fillings of Chang-8 oil-bearing beds from wells Funan3 and Funan6 in Zhiluo Oilfield,the southern of Ordos Basin were studied.The results showed that the oil/gas boiling inclusion groups of Chang-8 oil-bearing beds from wells Funan3 and Funan6 were exactly the same to that from well Ying16 in Yingwang Oilfield,and a lot of bubbles moved constantly;the geological phenomenon for oil/gas boiling inclusion groups were not isolated and occasional.The characteristics of incipient fracture core of Chang-8 oil-bearing beds from wells Funan3,Funan6 and Ying16 were shear-slip and shear fractures,and tensile-bearing stress was alternately active under the action of regional structure;decompression boiling of oil in the oil-bearing bed happened in an instant when tensile stress was active,light cut fraction and other fluids flowed into fracture because of the connection of fracture and oil-bearing bed;fracture closed on the whole while the bearing stress was active,a part of fluid returned to the original oil-bearing bed,and another was overflowed onto other fracture so that new oil reservoir formed;calcium carbonate,which remained in the original fracture,crystallized gradually under the high strata pressure and wrapped the rudimental light cut fraction,so that the oil/gas inclusion groups formed;the formation pressure of the inclusion was high,and the inclusion included light cut fraction,so that the inclusion was in a state of boiling at normal temperatures and pressures;the above process happened again and again,and the oil/gas boiling inclusion groups,which distributed along the line of crystal growth,formed lamellar and ribbon in the fillings of fractures.The formation processes of oil/gas boiling inclusion groups were the migration mechanism of seismic pumping and enriched the geological model of seismic pumping.
By the means of laser Raman spectroscopy and filling degree of inclusion,the inclusion groups of fillings of Chang-8 oil-bearing beds from wells Funan3 and Funan6 in Zhiluo Oilfield,the southern of Ordos Basin were studied.The results showed that the oil/gas boiling inclusion groups of Chang-8 oil-bearing beds from wells Funan3 and Funan6 were exactly the same to that from well Ying16 in Yingwang Oilfield,and a lot of bubbles moved constantly;the geological phenomenon for oil/gas boiling inclusion groups were not isolated and occasional.The characteristics of incipient fracture core of Chang-8 oil-bearing beds from wells Funan3,Funan6 and Ying16 were shear-slip and shear fractures,and tensile-bearing stress was alternately active under the action of regional structure;decompression boiling of oil in the oil-bearing bed happened in an instant when tensile stress was active,light cut fraction and other fluids flowed into fracture because of the connection of fracture and oil-bearing bed;fracture closed on the whole while the bearing stress was active,a part of fluid returned to the original oil-bearing bed,and another was overflowed onto other fracture so that new oil reservoir formed;calcium carbonate,which remained in the original fracture,crystallized gradually under the high strata pressure and wrapped the rudimental light cut fraction,so that the oil/gas inclusion groups formed;the formation pressure of the inclusion was high,and the inclusion included light cut fraction,so that the inclusion was in a state of boiling at normal temperatures and pressures;the above process happened again and again,and the oil/gas boiling inclusion groups,which distributed along the line of crystal growth,formed lamellar and ribbon in the fillings of fractures.The formation processes of oil/gas boiling inclusion groups were the migration mechanism of seismic pumping and enriched the geological model of seismic pumping.
引文
[1]Xie G C,Zheng Z W,Li R X,et al.The Oil/gas Boiling Inclu-sion and Its Geological Significance[C]∥Committee of the33rdInternational Geological Congress.Proceedings of the33rdInternational Geological Congress.Oslo:InternationalGeological Congress,2008:328.
[2]Shepherd T J,Rankin A H,Alderton D H M.流体包裹体研究实践指南[M].张恩世,张文怀,高怀忠,译.武汉:中国地质大学出版社,1990.
[3]卢焕章,范宏瑞,倪培,等.流体包裹体[M].北京:科学出版社,2004.
[4]Sibson R H,Moore J M M,Rankin A H.Seismic Pumping:aHydrothermal Fluid Transport Mechanism[J].Journal of theGeological Society,1975,131(6):653-659.
[5]邸领军,张东阳,王宏科.鄂尔多斯盆地喜山期构造运动与油气成藏[J].石油学报,2003,24(2):34-37.
[6]王朋岩,赵荣.松辽盆地西斜坡构造运动强度与油气运移[J].天然气工业,2006,26(7):8-10.
[7]孙永河,付晓飞,吕延防,等.地震泵抽吸作用与油气运聚成藏物理模拟[J].吉林大学学报:地球科学版,2007,37(1):98-104.
[8]邱楠生,康永尚,樊洪海,等.柴达木盆地西部地区第三系温度压力和油气分布相互关系探讨[J].地球物理学报,1999,42(6):826-833.
[9]阎福礼,贾东,卢华复,等.东营凹陷油气运移的地震泵作用[J].石油与天然气地质,1999,20(4):295-298.
[10]邱楠生,张善文,金之钧.东营凹陷油气流体运移模式探讨——来自沸腾包裹体的证据[J].石油实验地质,2001,23(4):403-407.
[11]下寺湾采油厂.下寺湾油田裂缝高产井分布规律研究及其靶区优选[R].延安:陕西延长石油(集团)有限责任公司延长油田股份有限责任公司,2008.
[12]高振东.下寺湾式岩性封闭裂缝油藏的建立[J].地球科学与环境学报,2008,30(3):265-270.
[13]长庆油田石油地质志编写组.中国石油地质志卷十二:长庆油田[M].北京:石油工业出版社,1992.
[14]陕西省地质矿产局.全国地层多重划分对比研究61:陕西省岩石地层[M].武汉:中国地质大学出版社,1998.
[15]王新辉.液化气船货物压力的控制[J].天津航海,2000(2):3-4.
[16]王战,吴文奎,谢广成,等.中国地壳的镶嵌构造与波浪运动[M].北京:地质出版社,1996.
[2]Shepherd T J,Rankin A H,Alderton D H M.流体包裹体研究实践指南[M].张恩世,张文怀,高怀忠,译.武汉:中国地质大学出版社,1990.
[3]卢焕章,范宏瑞,倪培,等.流体包裹体[M].北京:科学出版社,2004.
[4]Sibson R H,Moore J M M,Rankin A H.Seismic Pumping:aHydrothermal Fluid Transport Mechanism[J].Journal of theGeological Society,1975,131(6):653-659.
[5]邸领军,张东阳,王宏科.鄂尔多斯盆地喜山期构造运动与油气成藏[J].石油学报,2003,24(2):34-37.
[6]王朋岩,赵荣.松辽盆地西斜坡构造运动强度与油气运移[J].天然气工业,2006,26(7):8-10.
[7]孙永河,付晓飞,吕延防,等.地震泵抽吸作用与油气运聚成藏物理模拟[J].吉林大学学报:地球科学版,2007,37(1):98-104.
[8]邱楠生,康永尚,樊洪海,等.柴达木盆地西部地区第三系温度压力和油气分布相互关系探讨[J].地球物理学报,1999,42(6):826-833.
[9]阎福礼,贾东,卢华复,等.东营凹陷油气运移的地震泵作用[J].石油与天然气地质,1999,20(4):295-298.
[10]邱楠生,张善文,金之钧.东营凹陷油气流体运移模式探讨——来自沸腾包裹体的证据[J].石油实验地质,2001,23(4):403-407.
[11]下寺湾采油厂.下寺湾油田裂缝高产井分布规律研究及其靶区优选[R].延安:陕西延长石油(集团)有限责任公司延长油田股份有限责任公司,2008.
[12]高振东.下寺湾式岩性封闭裂缝油藏的建立[J].地球科学与环境学报,2008,30(3):265-270.
[13]长庆油田石油地质志编写组.中国石油地质志卷十二:长庆油田[M].北京:石油工业出版社,1992.
[14]陕西省地质矿产局.全国地层多重划分对比研究61:陕西省岩石地层[M].武汉:中国地质大学出版社,1998.
[15]王新辉.液化气船货物压力的控制[J].天津航海,2000(2):3-4.
[16]王战,吴文奎,谢广成,等.中国地壳的镶嵌构造与波浪运动[M].北京:地质出版社,1996.
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