川东北开江-梁平陆棚两侧飞仙关组储层特征
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摘要
川东北环开江-梁平陆棚地区是我国重要的油气勘探区域之一,该地区储层分布极为复杂,储集性差异很大。为此,基于前人已有工作,根据高分辨率层序地层学原理,综合地震、测井、岩相、露头及薄片等资料,对飞仙关组储集地层特征进行了描述。以层序体系域为单元,在单井高频层序地层划分和对比的基础上,建立了高精度的层序地层格架,并在层序地层格架内等时、动态地揭示了滩体发育特征及控制因素。以普光、元坝两个典型区块为代表,建立了开江-梁平陆棚两侧飞仙关组储层的精细结构模式。研究表明,普光区块储层纵向上可连续发育,横向上有较好的连续性,储层的孔渗性相对较好;元坝区块储层纵向厚度较小,往往靠高频层序的上部和顶部发育,储层总体孔渗性较差。进一步在层序框架内探讨储层的发育分布,对该区域飞仙关组的油气勘探开发具有重要的指导意义。
Kaijiang-Liangping continental shelf in northeastern Sichuan Basin is an important area for petroleum exploration in China.Reservoir distribution is very complicated and the reservoir quality is greatly variable.Based on the previous research,this paper described the reservoir characteristics of the Ferxianguan Formation by using high-resolution sequence stratigraphy and integrating various data such as seismic,logging,lithofacies,outcrop and thin section data.On the basis of high-frequency sequence stratigraphy division and correlation of single well,a high resolution sequence framework was established with system tract as the unit.The development features and factors controlling bank facies reservoirs rocks were analyzed within the framework.Taking Puguang and Yuanba blocks as the case study,we established the fine structure pattern for reservoirs in the Feixianguan Formation.The reservoirs in the Puguang gas field are thick in vertical and continuous in lateral,and have good porosity and permeability.In contrast,the reservoirs in the Yuanba gas field are thin in vertical,commonly occur at the upper or top of the high-frequency sequences,and have poor porosity and permeability as a whole.The further study of reservoir development and distribution within the high-resolution stratigraphic framework is of great significance to the exploration and development in the Feixianguan Formation.
Kaijiang-Liangping continental shelf in northeastern Sichuan Basin is an important area for petroleum exploration in China.Reservoir distribution is very complicated and the reservoir quality is greatly variable.Based on the previous research,this paper described the reservoir characteristics of the Ferxianguan Formation by using high-resolution sequence stratigraphy and integrating various data such as seismic,logging,lithofacies,outcrop and thin section data.On the basis of high-frequency sequence stratigraphy division and correlation of single well,a high resolution sequence framework was established with system tract as the unit.The development features and factors controlling bank facies reservoirs rocks were analyzed within the framework.Taking Puguang and Yuanba blocks as the case study,we established the fine structure pattern for reservoirs in the Feixianguan Formation.The reservoirs in the Puguang gas field are thick in vertical and continuous in lateral,and have good porosity and permeability.In contrast,the reservoirs in the Yuanba gas field are thin in vertical,commonly occur at the upper or top of the high-frequency sequences,and have poor porosity and permeability as a whole.The further study of reservoir development and distribution within the high-resolution stratigraphic framework is of great significance to the exploration and development in the Feixianguan Formation.
引文
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[11]夏明军,曾大乾,邓瑞建,等.普光气田长兴组台地边缘礁、滩沉积相及储层特征[J].天然气地球科学,2009,20(8):549-557.Xia Mingjun,Zeng Daqian,Deng Ruijian,et al.Reef and shal-low facies and reservoir characteristics in Changxing Formation platform margin,Puguang Gas Field[J].Natural Gas Geosience,2009,20(8):549-557.
[12]钟怡江,陈洪德,林良彪,等.川东北地区长兴期—飞仙关期沉积体系分析[J].石油物探,2010,49(5):529-530.Zhong Yijiang,Chen Hongde,Lin Liangbiao,et al.Depositional system of Changxing—Feixianguan period in Northeastern Si-chuan Basin[J].Geophysical Prospecting for petroleum,2010,49(5):529-530.
[13]姜在兴.沉积体系及层序地层学研究现状及发展趋势[J].石油与天然气地质,2010,31(5):535-541.Jiang Zaixing.Studies of depositional systems and sequence stratigraphy:the present and the future[J].Oil&Gas Geology,2010,31(5):535-541.
[14]毛立华,钟建华,李卫兵,等.普光气田层序地层格架与储层发育特征[J].断块油气田,2010,17(3):312-315.Mao Lihua,Zhong Jianhua,Li Weibing,et al.Sequence strati-graphic framework and reservoir developmental features of Pu-guang Gas Field[J].Fault-Block Oil&Gas Field,2010,17(3):312-315.
[15]Van Wagoner J C,Posaentier H W,Mitchum R M,等.层序地层学基础综述和关键定义[C]//威尔格斯C K.层序地层学原理:海平面变化综合分析.徐怀大,译.北京:石油工业出版社,1993:49-55.Van Wagoner J C,Posaentier H W,Mitchum R M,et al.Basic review and key definition of sequence stratigraphy,Principles of sequence stratigraphy[C]//Wilgus C K.The comprehensive analysis of sea level changes.Xu Huaida,translated.Beijing:Petroleum Industry Press,1993:49-55.
[2]马永生,牟传龙,谭钦银,等.关于开江-梁平海槽的认识[J].石油与天然气地质,200627(3):327-331.Ma Yongsheng,Mou Chuanlong,Tan Qingyin,et al.A discus-sion on Kaijiang-Liangping ocean trough[J].Oil&Gas Geo-logy,2006,27(3):327-331.
[3]马永生,傅强,郭彤楼,等.川东北地区普光气田长兴—飞仙关气藏成藏模式与成藏过程[J].石油实验地质,2005,27(5):455-461.Ma Yongsheng,Fu Qiang,Guo Tonglou,et al.Pool forming pat-tern and process of the upper Permian lower Triassic,the Pu-guang gas field,northeast Sichuan Basin,China[J].Petroleum Geology&Experiment,2005,27(5):455-461.
[4]郭正吾,邓康龄,韩永辉,等.四川盆地形成与演化[M].北京:地质出版社,1996.Guo Zhengwu,Deng Kangling,Han Yonghui,et al.The forma-tion and development of Sichuan basin[M].Beijing:Geological Publishing House,1996.
[5]郭彤楼.川东北地区飞仙关组鲕滩储层成岩作用——以宣汉-达县及元坝区块为例[J].石油与天然气地质,2010,31(5):620-631.Guo Tonglou.Diagenesis of the Feixianguan oolitic shoal reser-voirs in the northeastern Sichuan Basin—examples from Xuan-han-Daxian and Yuanba areas[J].Oil&Gas Geology,2010,31(5):620-631.
[6]王正和,郭彤楼,谭钦银,等.四川盆地东北部长兴组-飞仙关组各沉积相带储层特征[J].石油与天然气地质,2011,32(1):56-63.Wang Zhenghe,Guo Tonglou,Tan Qinyin,et al.Reservoir chara-cteristics of different sedimentary facies in the Changxing and Feixianguan Formations,northeast of the Sichuan Basin[J].Oil&Gas Geology,2011,32(1):56-63.
[7]陈琪,胡文瑄,李庆,等.川东北盘龙洞长兴组-飞仙关组白云岩化特征及成因[J].石油与天然气地质,2012,33(1):84-93.Chen Qi,Hu Wenxuan,Li Qing,et al.Characteristics and gene-sis of dolomitization in Changxing and Feixianguan Formations in Panlongdong,northeastern Sichuan Basin[J].Oil&Gas Geology.2012,33(1):84-93.
[8]管宏林,蒋小琼,王恕一,等.普光气田与建南气田长兴组、飞仙关组储层对比研究[J].石油实验地质,2010,32(2):130-135.Guan Hong lin,Jiang Xiaoqiong,Wang Shuyi,et al.A compara-tive study of reservoirs of the Changxing and Feixianguan For-mation between Puguang gasfield and Jiannan gasfield in the Sichuan Basin[J].Petroleum Geology&Experiment.2010,32(2):130-135.
[9]徐胜林,陈洪德,林良彪,等.川东南地区飞仙关组碳酸盐岩储层特征[J].断块油气田,2010,17(1):19-23.Xu Shenglin,Chen Hongde,Lin Liangbiao,et al.Characteristics of carbonate rock reservoir of Feixianguan Formation in sout-heastern Sichuan Basin[J].Fault-Block Oil&Gas Field,2010,17(1):19-23.
[10]李力,孙耀庭,陈建.普光气田飞仙关组和长兴组测井解释方法[J].断块油气田,2011,18(4):508-511.Li Li,Sun Yaoting,Chen Jian.Well logging interpretation method for Feixianguan and Changxing Formations in Puguang Gas Field[J].Fault-Block Oil&Gas Field,2011,18(4):508-511.
[11]夏明军,曾大乾,邓瑞建,等.普光气田长兴组台地边缘礁、滩沉积相及储层特征[J].天然气地球科学,2009,20(8):549-557.Xia Mingjun,Zeng Daqian,Deng Ruijian,et al.Reef and shal-low facies and reservoir characteristics in Changxing Formation platform margin,Puguang Gas Field[J].Natural Gas Geosience,2009,20(8):549-557.
[12]钟怡江,陈洪德,林良彪,等.川东北地区长兴期—飞仙关期沉积体系分析[J].石油物探,2010,49(5):529-530.Zhong Yijiang,Chen Hongde,Lin Liangbiao,et al.Depositional system of Changxing—Feixianguan period in Northeastern Si-chuan Basin[J].Geophysical Prospecting for petroleum,2010,49(5):529-530.
[13]姜在兴.沉积体系及层序地层学研究现状及发展趋势[J].石油与天然气地质,2010,31(5):535-541.Jiang Zaixing.Studies of depositional systems and sequence stratigraphy:the present and the future[J].Oil&Gas Geology,2010,31(5):535-541.
[14]毛立华,钟建华,李卫兵,等.普光气田层序地层格架与储层发育特征[J].断块油气田,2010,17(3):312-315.Mao Lihua,Zhong Jianhua,Li Weibing,et al.Sequence strati-graphic framework and reservoir developmental features of Pu-guang Gas Field[J].Fault-Block Oil&Gas Field,2010,17(3):312-315.
[15]Van Wagoner J C,Posaentier H W,Mitchum R M,等.层序地层学基础综述和关键定义[C]//威尔格斯C K.层序地层学原理:海平面变化综合分析.徐怀大,译.北京:石油工业出版社,1993:49-55.Van Wagoner J C,Posaentier H W,Mitchum R M,et al.Basic review and key definition of sequence stratigraphy,Principles of sequence stratigraphy[C]//Wilgus C K.The comprehensive analysis of sea level changes.Xu Huaida,translated.Beijing:Petroleum Industry Press,1993:49-55.
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