川西拗陷马井地区雷四~3亚段储层特征及成岩作用
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摘要
针对川西拗陷马井地区获产工业气流的A1井,通过钻井岩心编录、薄片显微鉴定、物性分析、阴极发光、碳氧同位素、X射线衍射分析等方法,对中三叠统雷口坡组第四段第3亚段开展了储层特征、成岩作用和成岩演化序列的研究。马井地区雷四~3亚段可分为上、下两个储层段,上储层段主要储层岩石类型为颗粒晶粒云灰岩和晶粒云灰岩,下储层段主要储层岩石类型为晶粒颗粒白云岩、颗粒晶粒白云岩和晶粒白云岩;储集空间类型以晶间孔、晶间溶孔、粒间孔、粒内孔和裂缝为主;储层成岩作用具有多类型、多期次改造和叠加的特征,主要成岩作用有白云石化作用、溶蚀作用、破裂作用、胶结作用、压实压溶作用和去云化作用。根据成岩作用的先后顺序、矿物的相互切割关系,结合成岩环境演化特征,将马井地区雷四~3亚段储层划分为准同生期、浅埋藏期、表生期和中深埋藏期4个成岩期。
The reservoir characteristics,diagenesis and diagenetic evolution sequences of the Member4-3 of Middle Triassic Leikoupo Formation(T2 l4-3)in industrial gas production Well A1 at Majing area of western Sichuan depression were studied by drilling core compilation,thin section identification,physical property analysis,cathode luminescence analysis,X-ray diffraction analysis,carbon and oxygen isotopes analysis.It shows that the T2 l4-3 at Majing area can be further divided into the upper and the lower reservoirs.The rock types in the upper reservoir consist of granular crystalline dolomite limestone and crystalline dolomitic limestone,while the main reservoir rock types in the lower reservoir are composed of crystalline granular dolomite,granular crystalline dolomite and crystalline dolomite.Thin section observation and identification reveals that the major reservoir space in the reservoir rocks are intercrystalline pores,intercrystalline dissolution pores,intergranular pores,intragranular pores and fractures respectively.Reservoir diagenesis is characterized by multitype and multi-stage reformation as well as by superposition, with the digenetic types of dolomitization, dissolution, fracture, cementation, mechanical-chemical compaction and dedolomitization.Based on the diagenetic sequences and mutual cutting relationship of minerals,in combination with the evolution character of diagenetic environment,the T2 l4-3 at Majing area has been classified into 4 diagenetic stages,they are penecontemporaneous stage,shallow burial stage,supergene stage and middle-deep burial stage.
The reservoir characteristics,diagenesis and diagenetic evolution sequences of the Member4-3 of Middle Triassic Leikoupo Formation(T2 l4-3)in industrial gas production Well A1 at Majing area of western Sichuan depression were studied by drilling core compilation,thin section identification,physical property analysis,cathode luminescence analysis,X-ray diffraction analysis,carbon and oxygen isotopes analysis.It shows that the T2 l4-3 at Majing area can be further divided into the upper and the lower reservoirs.The rock types in the upper reservoir consist of granular crystalline dolomite limestone and crystalline dolomitic limestone,while the main reservoir rock types in the lower reservoir are composed of crystalline granular dolomite,granular crystalline dolomite and crystalline dolomite.Thin section observation and identification reveals that the major reservoir space in the reservoir rocks are intercrystalline pores,intercrystalline dissolution pores,intergranular pores,intragranular pores and fractures respectively.Reservoir diagenesis is characterized by multitype and multi-stage reformation as well as by superposition, with the digenetic types of dolomitization, dissolution, fracture, cementation, mechanical-chemical compaction and dedolomitization.Based on the diagenetic sequences and mutual cutting relationship of minerals,in combination with the evolution character of diagenetic environment,the T2 l4-3 at Majing area has been classified into 4 diagenetic stages,they are penecontemporaneous stage,shallow burial stage,supergene stage and middle-deep burial stage.
引文
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[18]袁鑫鹏,刘建波.回流渗透模式白云岩研究历史与进展[J].古地理学报,2012,14(2):219-228.Yuan X P,Liu J B.Research history and progress on reflux seepage dolostone[J].Journal of Palaeogeography,2012,14(2):219-228.(in Chinese)
[19]Korte C,Kozur H W,Veizer J.δ13 C andδ18 O values of Triassic brachiopods and carbonate rocks as proxies for coeval seawater and palaeotemperature[J].Palaeogeography Palaeoclimatology Palaeoecology,2005,226(3):287-306.
[20]李蓉,许国明,宋晓波,等.川西坳陷雷四3亚段储层控制因素及孔隙演化特征[J].东北石油大学学报,2016,40(5):63-74.Li R,Xu G M,Song X B,et al.Reservoir characteristics and control factors of the third period of the fourth Leikoupo Formation in Western Sichuan depression[J].Journal of Northeast Petroleum University,2016,40(5):63-74.(in Chinese)
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[2]屈德纯.中坝气田雷三气藏开发跟踪分析研究[J].天然气勘探与开发,2004,27(1):30-32.Qu D C.Development tracing analysies of Leisan gas reservoir in Zhongba[J].Natural Gas Exploration&Development,2004,27(1):30-32.(in Chinese)
[3]李书兵,许国明,宋晓波.川西龙门山前构造带彭州雷口坡组大型气田的形成条件[J].中国石油勘探,2016,21(3):74-82.Li S B,Xu G M,Song X B.Formation conditions of Pengzhou large gas field of Leikoupo Formation in Longmenshan piedmont tectonic belt,western Sichuan Basin[J]. China Petroleum Exploration,2016,21(3):74-82.(in Chinese)
[4]王琼仙,宋晓波,王东,等.川西龙门山前雷口坡组四段储层特征及形成机理[J].石油实验地质,2017,39(4):491-497.Wang Q X,Song X B,Wang D,et al.Reservoir characteristics and formation mechanism of the 4th member of the Leikoupo Formation in Longmen Mountain front[J].Petroleum Geology&Experiment,2017,39(4):491-497.(in Chinese)
[5]赵晨露.龙门山前陆盆地断裂系统研究[D].成都:成都理工大学档案馆,2013.Zhao C L.The Research on Fault System in Longmen Shan Foreland Basin[D].Chengdu:The Archive of Chengdu University of Technology,2013.(in Chinese)
[6]李宏涛,胡向阳,史云清,等.四川盆地川西坳陷龙门山前雷口坡组四段气藏层序划分及储层发育控制因素[J].石油与天然气地质,2017,38(4):753-763.Li H T,Hu X Y,Shi Y Q,et al.Sequence division and controlling factors of reservoir development of the4th Member of Leikoupo Formation in foreland of Longmen Mountains in the Western Sichuan Depression,Sichuan Basin[J].Oil&Gas Geology,2017,38(4):753-763.(in Chinese)
[7]唐宇.川西地区雷口坡组沉积与其顶部风化壳储层特征[J].石油与天然气地质,2013,34(1):42-47.Tang Y.Characterization of the sedimentation of the Leikoupo Formation and the weathering crust reservoirs at the top of the formation in the Western Sichuan Basin[J].Oil&Gas Geology,2013,34(1):42-47.(in Chinese)
[8]许国明,宋晓波,冯霞,等.川西地区中三叠统雷口坡组天然气勘探潜力[J].天然气工业,2013,33(8):8-14.Xu G M,Song X B,Feng X,et al.Gas potential of the Middle Triassic Leikoupo Formation in the western Sichuan Basin[J].Natural Gas Industry,2013,33(8):8-14.(in Chinese)
[9]宋晓波,王琼仙,隆轲,等.川西地区中三叠统雷口坡组古岩溶储层特征及发育主控因素[J].海相油气地质,2013,18(2):8-14.Song X B,Wang Q X,Long K,et al.Characteristics and main controlling factors of Middle Trassic Leikoupo paleokarst reservoirs in Western Sichuan Basin[J].Marine Origin Petroleum Geology,2013,18(2):8-14.(in Chinese)
[10]宋晓波,刘诗荣,王琼仙,等.川西坳陷西缘中下三叠统油气成藏主控因素[J].岩性油气藏,2011,23(1):67-73.Song X B,Liu S R,Wang Q X,et al.Main controlling factors of hydrocarbon accumulation of Middle-Lower Triassic in western margin of Western Sichuan depression[J]. Lithologic Reservoirs,2011,23(1):67-73.(in Chinese)
[11]吴世祥,李宏涛,龙胜祥,等.川西雷口坡组碳酸盐岩储层特征及成岩作用[J].石油与天然气地质,2011,32(4):542-550.Wu S X,Li H T,Long S X,et al.A study on characteristics and diagenesis of carbonate reservoirs in the Middle Triassic Leikoupo Formation in Western Sichuan depression[J].Oil&Gas Geology,2011,32(4):542-550.(in Chinese)
[12]杨光,石学文,黄东,等.四川盆地龙岗气田雷四3亚段风化壳气藏特征及其主控因素[J].天然气工业,2014,34(9):17-24.Yang G,Shi X W,Huang D,et al.Characteristics and major controls of weathering crust gas reservoirs in T2l4-3 in the Longgang gas field,Sichuan Basin[J].Natural Gas Industry,2014,34(9):17-24.(in Chinese)
[13]马治鸾,陈洪德,钟怡江,等.四川盆地东北部元坝地区中三叠统雷口坡组四段古岩溶特征及其油气地质意义[J].地质通报,2012,31(4):577-585.Ma Z L,Chen H D,Zhong Y J,et al.Paleokarstification in carbonates of 4th Member of Middle Triassic Leikoupo Formation in northeastern Sichuan Basin and its petroleum geological significance[J].Geological Bulletin of China,2012,31(4):577-585.(in Chinese)
[14]高恒逸,邓美洲,李勇,等.川西彭州地区中三叠统雷口坡组四段储层特征及成岩作用[J].海相油气地质,2018,23(1):37-46.Gao H Y,Deng M Z,Li Y,et al.Diagenesis and reservoir characteristics in the Middle Trassic Lei-4Member of Leikoupo Formation in Pengzhou area of Western Sichuan Basin[J].Marine Origin Petroleum Geology,2018,23(1):37-46.(in Chinese)
[15]许国明,冯霞,朱兰,等.川西新场构造带雷口坡组-马鞍塘组勘探建议[J].天然气技术与经济,2011,5(5):16-20.Xu G M,Feng X,Zhu L,et al.Exploration suggestions on Leikoupo to Maantang Formation in Xinchang Structural Belt,West Sichuan Basin[J].Natural Gas Technology and Economy,2011,5(5):16-20.(in Chinese)
[16]姜在兴.沉积学[M].北京:石油工业出版社,2003.Jiang Z X.Sedimentology[M].Beijing:Petroleum Industry Press,2003.(in Chinese)
[17]黄思静,QING Hairuo,胡作维,等.封闭系统中的白云石化作用及其石油地质学和矿床学意义———以四川盆地东北部三叠系飞仙关组碳酸盐岩为例[J].岩石学报,2007,23(11):2955-2962.Huang S J,Qing H R,Hu Z W,et al.Closedsystem dolomitization and the significance for petroleum and economic geology:An example from Feixianguan carbonates,Triassic,NE Sichuan Basin of China[J].Acta Petrologica Sinica,2007,23(11):2955-2962.(in Chinese)
[18]袁鑫鹏,刘建波.回流渗透模式白云岩研究历史与进展[J].古地理学报,2012,14(2):219-228.Yuan X P,Liu J B.Research history and progress on reflux seepage dolostone[J].Journal of Palaeogeography,2012,14(2):219-228.(in Chinese)
[19]Korte C,Kozur H W,Veizer J.δ13 C andδ18 O values of Triassic brachiopods and carbonate rocks as proxies for coeval seawater and palaeotemperature[J].Palaeogeography Palaeoclimatology Palaeoecology,2005,226(3):287-306.
[20]李蓉,许国明,宋晓波,等.川西坳陷雷四3亚段储层控制因素及孔隙演化特征[J].东北石油大学学报,2016,40(5):63-74.Li R,Xu G M,Song X B,et al.Reservoir characteristics and control factors of the third period of the fourth Leikoupo Formation in Western Sichuan depression[J].Journal of Northeast Petroleum University,2016,40(5):63-74.(in Chinese)
[21]林彤.川西地区中部中三叠统雷四段储层特征[D].成都:成都理工大学档案馆,2016.Lin T.Reservoir Characteristics of Middle Triassic Leikoupo-4Formation in the Centre Part of Western Sichuan Basin[D]. Chengdu:The Archive of Chengdu Univerisity of Technology,2016.(in Chinese)
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