川东北元坝2井区飞仙关组鲕粒滩内部构成特征
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摘要
台地边缘鲕粒滩为川东北元坝2井区主要的储集层,其主要发育在飞仙关组第一个三级层序高位体系域的Ps4～Ps7准层序中。基于测井、录井、岩心、薄片以及分析化验等资料,在准层序组及准层序级别对鲕粒滩内部构成进行精细解剖,发现研究区从Ps4～Ps7为相对海平面逐渐下降的过程,期间发生多期水体变化,鲕粒滩呈现出不同的沉积特征。从下往上,水体逐渐变浅,水动力条件增强,成鲕条件逐渐变好,鲕粒滩规模逐渐增大。一次完整的鲕粒滩发育沉积旋回由滩间海、稳定鲕粒沙坪和活动边缘带等构成单元组成。在鲕粒滩发育过程中,由于海平面频繁的升降,鲕粒滩内部构成单元不会依次完整发育,会出现构成单元不断变化、互层发育。通过地震属性研究发现,鲕粒滩主要分布在元坝2井区的北部和东北部,滩体规模较小,呈孤立分布,连片性不强。进一步总结了研究区鲕粒滩沉积演化模式:Ps1～Ps3早期,研究区整体处于水体较深的环境,主要发育滩间海沉积;在Ps3晚期,水体开始变浅,水动力条件增强,在地势高部位开始发育薄层、零星分布的鲕粒滩,以稳定鲕粒沙坪为主。Ps4～Ps6,鲕粒滩在研究区大规模发育,稳定鲕粒沙坪和活动边缘带均有发育; Ps7时期,鲕粒滩规模最大,以鲕粒滩活动边缘带沉积为主。对比物性特征发现,在鲕粒滩内部构成中活动边缘带物性条件最好,是潜在的优质储层发育部位。
The oolitic shoal is the major reservoir in Yuanba 2 well block in the northeast of Sichuan Province,and mainly developed in the parasequence 4( Ps4) ～ parasequence 7( Ps7) of HST for the 1 th third sequence.The internal architecture of oolitic shoal is deeply studied by comprehensive analysis of logging,core,thin section and other laboratory data. Relative sea level gradually declined from Ps4 to Ps7 in the study aera,and changed servarl times during the deposition process,which caused the oolitic shoal has varied sedimentary feature. From Ps4 to Ps7,due to decline of the sea level,the hydrodynamic condition enhanced,and the oolitic formation condition got gradually better and the size of oolitic shoal increased gradually. A complete oolitic shoal development cycle is composed of interbank sea,the stabilized oolitic sand flat and the mobile fringe. During the development of oolitic shoal,with the frequent sea-level rise and fall,the internal units of the oolitic shoal did not develop in sequence,and the formation units changed constantly,repeated and developed interbedly. Based on the seismic attributes analysis,it is found that oolitic shoal mainly developed at the north and northeast of study aera. The oolitic shoal was small,isolated distributed,and the continuity was not good. Finally,the sedimentary evolution model of study aera was reconstructed. From the Ps1 to the early Ps3,Yuanba 2 well block located in the relative deep water condition,and developed interbank sea sediment. At the late of Ps3,the sea level began to get shallower,and the hydrodynamic condition enhanced. So the oolitic shoal,mainly the stabilized oolitic,developed at the high terrain area. From the Ps4 to the Ps6,the oolitic shoals,both the stabilized oolitic sand flat and the mobile fringe,extensively developed in the study area. At the Ps7,the oolitic shoal was the largest and mainly developed. By comparing the property feature,it is found that the mobile fringe has the best physical property in the oolitic shoal,and can be the potential high quality reservoir.
The oolitic shoal is the major reservoir in Yuanba 2 well block in the northeast of Sichuan Province,and mainly developed in the parasequence 4( Ps4) ～ parasequence 7( Ps7) of HST for the 1 th third sequence.The internal architecture of oolitic shoal is deeply studied by comprehensive analysis of logging,core,thin section and other laboratory data. Relative sea level gradually declined from Ps4 to Ps7 in the study aera,and changed servarl times during the deposition process,which caused the oolitic shoal has varied sedimentary feature. From Ps4 to Ps7,due to decline of the sea level,the hydrodynamic condition enhanced,and the oolitic formation condition got gradually better and the size of oolitic shoal increased gradually. A complete oolitic shoal development cycle is composed of interbank sea,the stabilized oolitic sand flat and the mobile fringe. During the development of oolitic shoal,with the frequent sea-level rise and fall,the internal units of the oolitic shoal did not develop in sequence,and the formation units changed constantly,repeated and developed interbedly. Based on the seismic attributes analysis,it is found that oolitic shoal mainly developed at the north and northeast of study aera. The oolitic shoal was small,isolated distributed,and the continuity was not good. Finally,the sedimentary evolution model of study aera was reconstructed. From the Ps1 to the early Ps3,Yuanba 2 well block located in the relative deep water condition,and developed interbank sea sediment. At the late of Ps3,the sea level began to get shallower,and the hydrodynamic condition enhanced. So the oolitic shoal,mainly the stabilized oolitic,developed at the high terrain area. From the Ps4 to the Ps6,the oolitic shoals,both the stabilized oolitic sand flat and the mobile fringe,extensively developed in the study area. At the Ps7,the oolitic shoal was the largest and mainly developed. By comparing the property feature,it is found that the mobile fringe has the best physical property in the oolitic shoal,and can be the potential high quality reservoir.
引文
1马永生,牟传龙,谭钦银,等.达县-宣汉地区长兴组-飞仙关组礁滩相特征及其对储层的制约[J].地学前缘,2007,14(1):182-192Ma Yongsheng,Mou Chuanlong,Tan Qinyin,et al.Reef-bank features of Permian Changxing Formation and Triassic Feixianguan Formation in the Daxian-Xuanhan Area,Sichuan Province,South China and constrain for the reservoirs of natural gas[J].Earth Science Frantiers,2007,14(1):182-192
2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):620-630Guo Tonglou.Diagenesis of the Feixianguan oolitic shoal reservoirs in the northeastern Sichuan Basin-Examples from Xuanhan-Daxian and Yuanba areas[J].Oil&Gas Geology,2010,31(5):620-630
3陈辉,郭海洋,徐祥恺,等.四川盆地剑阁-九龙山地区长兴期与飞仙关期古地貌演化特征及其对礁滩体的控制[J].石油与天然气地质,2016,37(6):854-861Chen Hui,Guo Haiyang,Xu Xiangkai,et al.Features of paleogeomorphological evolution and its control on reef flat composite in Changxing-Feixianguan Formation in Jiange-Jiulongshan region,the Sichuan Basin[J].Oil&Gas Geology,2016,37(6):854-861
4马永生,蔡勋育,赵培荣.元坝气田长兴组-飞仙关组礁滩相储层特征和形成机理[J].石油学报,2014,35(6):1001-1011Ma Yongsheng,Cai Xunyu,Zhao Peirong.Characteristics and formation mechanisms of reef-shoal carbonate reservoirs of Changxing-Feixianguan formations,Yuanba gas field[J].Acta Petrolei Sinica,2014,35(6):1001-1011
5程锦翔,谭钦银,郭彤楼,等.川东北元坝地区长兴组-飞仙关组碳酸盐台地边缘沉积特征及演化[J].沉积与特提斯地质,2010,30(4):29-37Cheng jinxiang,Tan Qinyin,Guo Tonglou,et al.Sedimentary characteristics and evolution of the carbonate platform-margins in the Changxing Formation-Feixianguan Formation in Yuanba,northeastern Sichuan[J].Sedimentary Gology and Tethyan Geology,2010,30(4):29-37
6刘雁婷,傅恒,陈骥,等.川东北元坝地区三叠系飞仙关组鲕粒滩暴露标志的识别与地质意义[J].海相油气地质,2014,19(1):27-34Liu Yanting,Fu Heng,Chen Ji,et al.Exposure indications of Triassic Feixianguan oolitic beach reservoir in Yuanba area,northeast Sichuan Basin:Recognition and geological implication[J].Marine Origin Petroleum Geology,2014,19(1):27-34
7周绍鹏.川东北元坝地区飞仙关组台缘沉积结构及鲕粒滩时空响应[D].成都:成都理工大学,2017Zhou Shaopeng.The sedimentary structure and spatial temporal response of the Feixianguan Formation in Yuanba area,Northeastern Sichuan Basin[D].Chengdu:Chengdu University of Technology,2017
8段金宝,黄仁春,程胜辉,等.川东北元坝地区长兴期飞仙关期碳酸盐岩台地沉积体系及演化[J].成都理工大学学报(自然科学版),2018,35(6):663-668Duan Jinbao,Huang Renchun,Cheng Shenghui,et al.Depositional system and the evolution of carbonate rock platform of ChangxingFeixianguan period in Yuanba area of Northeast Sichuan,China[J].Journal of Chengdu University of Technology(Science&Technology Edition),2018,35(6):663-668
9孙家宁.川东北元坝2探区长兴组台缘生物礁-滩沉积体系分析[D].武汉:中国地质大学(武汉),2011Sun Jianing.Depositional system analysis of carbonate platform margin reef-shoal of Changxing Formation in the Yuanba 2 prospect area,Northeastern Sichuan Basin[D].Wuhan:China University of Geoseience(Wuhan),2011
10刘文波,汪益宁,赖枫鹏.四川东北部长兴-飞仙关组沉积相展布及储层发育[J].科学技术与工程,2011,11(28):6952-6955Liu Wenbo,Wang Yining,Lai Fengpeng.Northeast Sichuan Changxing-Feixianguan sedimentary facies and reservoir development[J].Science Technology and Engineering,2011,11(28):6952-6955
11孟浩,汪益宁,滕蔓.四川盆地白云岩储层及白云岩化作用[J].科学技术与工程,2011,11(32):8015-8017Meng Hao,Wang Yining,Teng Man.Sichuan Basin,dolomite and dolomitization[J].Science Technology and Engineering,2011,11(32):8015-8017
12荣辉,焦养泉,吴立群,等.江油二郎庙鱼洞子剖面飞仙关组鲕粒滩内部构成[J].地球科学(中国地质大学学报),2010,35(1):125-136Rong Hui,Jiao Yangquan,Wu Liqun,et al.Oolitic shoal composition and its impl ication of Feixianguan Formation in Yudongzi Section of Erlangmiao,Jiangyou,Sichuan,China[J].Earth Science(Journal of China University of Geosciences),2010,35(1):125-136
13张玺华,贺振华,赵思为,等.川东北地区飞仙关组鲕粒滩地震识别技术[J].油气地球物理,2009,7(1):13-17Zhang Xihua,He Zhenhua,Zhao Siwei,et al.Seimic recognition technology on oolitic Beach in the northeast of Sichuan Feixianguan[J].Petroleum Geophysics,2009,7(1):13-17
14李岩峰,刘殊,曾晓.川东飞仙关组鲕滩储层地震响应特征及预测[J].石油物探,2005,44(3):236-240Li Yanfeng,Liu Shu,Zeng Xiao.Seismic response feature and prediction of oolitic beach reservoir of Feixianguan Formation in east Sichuan Basin[J].Geophysical Prospecting for Petroleum,2005,44(33):236-240
15刘殊,唐建明,马永生,等.川东北地区长兴组-飞仙关组礁滩相储层预测[J].石油与天然气地质,2006,27(3):332-347Liu Shu,Tang Jianming,Ma Yongsheng,et al.Prediction of reef and shoal facies reservoirs in Changxing-Feixianuan Formations in northeastern Sichuan Basin[J].Oil&Gas Geology,2006,27(3):332-347
16吕学菊,寿建峰,徐美茹,等.龙岗地区飞仙关组鲕粒滩微相的地震-地质综合预测[J].天然气工业,2012,32(6):21-23Lv Xueju,Shou Jianfeng,Xu Meiru,et al.Integrated seismic-geological prediction of oolitic beach microfacies in the Feixianguan Formation,Longgang[J].Natural Gas Instusty,2012,32(6):21-23
17马永生,郭旭升,凡睿.川东北普光气田飞仙关组鲕滩储集层预测[J].石油勘探与开发,2005,32(4):60-64Ma Yongsheng,Guo Xusheng,Fan Rui.Reservoir prediction of Feixianguan Formation in Puguang Gas Field,Northeast Sichuan Province[J].Petroleum Exploration and Development,2005,32(4):60-64
18杨雨,曾云贤,刘微.川东北部地区飞仙关组沉积相对鲕滩储层分布的控制[J].天然气勘探与开发,2002,25(3):1-9Yang Yu,Zeng Yunxian,Lin Wei.The analysis of sedimentary to control the distribution of oolitic shoal reservoir for Feixianguan Formation in Northeast Sichuan Province[J].Natural Gas Exploration and Development,2002,25(3):1-9
19徐世琦,洪海涛,张光荣,等.四川盆地下三叠统飞仙关组鲕粒储层发育的主要控制因素分析[J].天然气勘探与开发,2004,27(1):1-4Xu Shiqi,Hong Haitao,Zhang Guangrong,et al.Main controlling factor analysis on oolitic reservoir development of lower triassis Feixianguan Formation in Sichuan Basin[J].Natural Gas Exploration and Development,2004,27(1):1-4
20荣辉.江油二郎庙鱼洞子露头区下三叠统飞仙关组鲕粒滩垂向非均质性研究[D].武汉:中国地质大学(武汉),2011Rong Hui.The vertieal heterogeneity of oolitic shoal of Triassic feixianguan formation in yudongzi outcrops of Er Langmiao,Jiangyou[D].Wuhan:China University of Geoseience(Wuhan),2011
2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):620-630Guo Tonglou.Diagenesis of the Feixianguan oolitic shoal reservoirs in the northeastern Sichuan Basin-Examples from Xuanhan-Daxian and Yuanba areas[J].Oil&Gas Geology,2010,31(5):620-630
3陈辉,郭海洋,徐祥恺,等.四川盆地剑阁-九龙山地区长兴期与飞仙关期古地貌演化特征及其对礁滩体的控制[J].石油与天然气地质,2016,37(6):854-861Chen Hui,Guo Haiyang,Xu Xiangkai,et al.Features of paleogeomorphological evolution and its control on reef flat composite in Changxing-Feixianguan Formation in Jiange-Jiulongshan region,the Sichuan Basin[J].Oil&Gas Geology,2016,37(6):854-861
4马永生,蔡勋育,赵培荣.元坝气田长兴组-飞仙关组礁滩相储层特征和形成机理[J].石油学报,2014,35(6):1001-1011Ma Yongsheng,Cai Xunyu,Zhao Peirong.Characteristics and formation mechanisms of reef-shoal carbonate reservoirs of Changxing-Feixianguan formations,Yuanba gas field[J].Acta Petrolei Sinica,2014,35(6):1001-1011
5程锦翔,谭钦银,郭彤楼,等.川东北元坝地区长兴组-飞仙关组碳酸盐台地边缘沉积特征及演化[J].沉积与特提斯地质,2010,30(4):29-37Cheng jinxiang,Tan Qinyin,Guo Tonglou,et al.Sedimentary characteristics and evolution of the carbonate platform-margins in the Changxing Formation-Feixianguan Formation in Yuanba,northeastern Sichuan[J].Sedimentary Gology and Tethyan Geology,2010,30(4):29-37
6刘雁婷,傅恒,陈骥,等.川东北元坝地区三叠系飞仙关组鲕粒滩暴露标志的识别与地质意义[J].海相油气地质,2014,19(1):27-34Liu Yanting,Fu Heng,Chen Ji,et al.Exposure indications of Triassic Feixianguan oolitic beach reservoir in Yuanba area,northeast Sichuan Basin:Recognition and geological implication[J].Marine Origin Petroleum Geology,2014,19(1):27-34
7周绍鹏.川东北元坝地区飞仙关组台缘沉积结构及鲕粒滩时空响应[D].成都:成都理工大学,2017Zhou Shaopeng.The sedimentary structure and spatial temporal response of the Feixianguan Formation in Yuanba area,Northeastern Sichuan Basin[D].Chengdu:Chengdu University of Technology,2017
8段金宝,黄仁春,程胜辉,等.川东北元坝地区长兴期飞仙关期碳酸盐岩台地沉积体系及演化[J].成都理工大学学报(自然科学版),2018,35(6):663-668Duan Jinbao,Huang Renchun,Cheng Shenghui,et al.Depositional system and the evolution of carbonate rock platform of ChangxingFeixianguan period in Yuanba area of Northeast Sichuan,China[J].Journal of Chengdu University of Technology(Science&Technology Edition),2018,35(6):663-668
9孙家宁.川东北元坝2探区长兴组台缘生物礁-滩沉积体系分析[D].武汉:中国地质大学(武汉),2011Sun Jianing.Depositional system analysis of carbonate platform margin reef-shoal of Changxing Formation in the Yuanba 2 prospect area,Northeastern Sichuan Basin[D].Wuhan:China University of Geoseience(Wuhan),2011
10刘文波,汪益宁,赖枫鹏.四川东北部长兴-飞仙关组沉积相展布及储层发育[J].科学技术与工程,2011,11(28):6952-6955Liu Wenbo,Wang Yining,Lai Fengpeng.Northeast Sichuan Changxing-Feixianguan sedimentary facies and reservoir development[J].Science Technology and Engineering,2011,11(28):6952-6955
11孟浩,汪益宁,滕蔓.四川盆地白云岩储层及白云岩化作用[J].科学技术与工程,2011,11(32):8015-8017Meng Hao,Wang Yining,Teng Man.Sichuan Basin,dolomite and dolomitization[J].Science Technology and Engineering,2011,11(32):8015-8017
12荣辉,焦养泉,吴立群,等.江油二郎庙鱼洞子剖面飞仙关组鲕粒滩内部构成[J].地球科学(中国地质大学学报),2010,35(1):125-136Rong Hui,Jiao Yangquan,Wu Liqun,et al.Oolitic shoal composition and its impl ication of Feixianguan Formation in Yudongzi Section of Erlangmiao,Jiangyou,Sichuan,China[J].Earth Science(Journal of China University of Geosciences),2010,35(1):125-136
13张玺华,贺振华,赵思为,等.川东北地区飞仙关组鲕粒滩地震识别技术[J].油气地球物理,2009,7(1):13-17Zhang Xihua,He Zhenhua,Zhao Siwei,et al.Seimic recognition technology on oolitic Beach in the northeast of Sichuan Feixianguan[J].Petroleum Geophysics,2009,7(1):13-17
14李岩峰,刘殊,曾晓.川东飞仙关组鲕滩储层地震响应特征及预测[J].石油物探,2005,44(3):236-240Li Yanfeng,Liu Shu,Zeng Xiao.Seismic response feature and prediction of oolitic beach reservoir of Feixianguan Formation in east Sichuan Basin[J].Geophysical Prospecting for Petroleum,2005,44(33):236-240
15刘殊,唐建明,马永生,等.川东北地区长兴组-飞仙关组礁滩相储层预测[J].石油与天然气地质,2006,27(3):332-347Liu Shu,Tang Jianming,Ma Yongsheng,et al.Prediction of reef and shoal facies reservoirs in Changxing-Feixianuan Formations in northeastern Sichuan Basin[J].Oil&Gas Geology,2006,27(3):332-347
16吕学菊,寿建峰,徐美茹,等.龙岗地区飞仙关组鲕粒滩微相的地震-地质综合预测[J].天然气工业,2012,32(6):21-23Lv Xueju,Shou Jianfeng,Xu Meiru,et al.Integrated seismic-geological prediction of oolitic beach microfacies in the Feixianguan Formation,Longgang[J].Natural Gas Instusty,2012,32(6):21-23
17马永生,郭旭升,凡睿.川东北普光气田飞仙关组鲕滩储集层预测[J].石油勘探与开发,2005,32(4):60-64Ma Yongsheng,Guo Xusheng,Fan Rui.Reservoir prediction of Feixianguan Formation in Puguang Gas Field,Northeast Sichuan Province[J].Petroleum Exploration and Development,2005,32(4):60-64
18杨雨,曾云贤,刘微.川东北部地区飞仙关组沉积相对鲕滩储层分布的控制[J].天然气勘探与开发,2002,25(3):1-9Yang Yu,Zeng Yunxian,Lin Wei.The analysis of sedimentary to control the distribution of oolitic shoal reservoir for Feixianguan Formation in Northeast Sichuan Province[J].Natural Gas Exploration and Development,2002,25(3):1-9
19徐世琦,洪海涛,张光荣,等.四川盆地下三叠统飞仙关组鲕粒储层发育的主要控制因素分析[J].天然气勘探与开发,2004,27(1):1-4Xu Shiqi,Hong Haitao,Zhang Guangrong,et al.Main controlling factor analysis on oolitic reservoir development of lower triassis Feixianguan Formation in Sichuan Basin[J].Natural Gas Exploration and Development,2004,27(1):1-4
20荣辉.江油二郎庙鱼洞子露头区下三叠统飞仙关组鲕粒滩垂向非均质性研究[D].武汉:中国地质大学(武汉),2011Rong Hui.The vertieal heterogeneity of oolitic shoal of Triassic feixianguan formation in yudongzi outcrops of Er Langmiao,Jiangyou[D].Wuhan:China University of Geoseience(Wuhan),2011