四川盆地五峰组-龙马溪组页岩气高产地质原因及启示——以涪陵页岩气田JY6-2HF为例

doi:10.11743/ogg20200303

摘要/Abstract

摘要： 涪陵页岩气田开发的巨大成功（JY6-2HF井累产超过3×10⁸ m³）为五峰组-龙马溪组页岩气勘探开发提供了新的启示，这一成功的关键在于①焦石坝地区位于鄂西-渝东五峰组-龙马溪组深水沉积区，WF2—LM4笔石带页岩厚度较大，具有较好的页岩气富集的物质基础；②JY6-2HF井主要穿行在WF2—LM4笔石带页岩层位中，该套优质页岩与中东-北非的“Lower Hot Shale”具有全球可对比性。涪陵、威远和长宁等页岩气田开发井的主要水平段也都在这段笔石带之中，该笔石带页岩具有有机碳含量高（TOC>3%）、有机质孔最发育（有机质孔隙度>4%）和含气量高（6.87~9.02 m³/t）等特点。综合分析认为，在类似的地质和工程条件下，页岩气井水平轨迹在WF2—LM4笔石带页岩中穿行比例决定了页岩气单井产量和最终可采储量（EUR）。研究成果将为四川盆地及其周缘五峰组-龙马溪组页岩气和世界其他地区志留系页岩气勘探开发提供参考。

关键词: JY6-2HF井, 五峰组-龙马溪组, 页岩气, 笔石带, 焦石坝, 四川盆地

Abstract: The great success of shale gas development in Fuling (the cumulative production of Well JY6-2HF has exceeded 300 million cubic meters) provides new enlightenment for the exploration and development of Wufeng-Longmaxi Formations' shale gas reservoir.The keys for the success are:(1) the Wufeng-Longmaxi Formations in Jiaoshiba area were deposited in deep water.The WF2-LM4 graptolitic zone shale is relatively thick,laying a better material basis for shale gas enrichment.(2) The lateral of Well JY6-2HF is mainly emplaced in WF2-LM4 graptolitic zone,which contains high-quality shale comparable to the "Lower Hot Shale" in Middle East-North Africa.Most of the laterals of shale gas wells in Weiyuan and Changning shale gas fields are also emplaced in this graptolitic zone,which is characterized by high total organic carbon content (TOC >3%) and high gas content (6.87-9.02 m³/t),and highly-developed organic pores (organic porosity >4%).Comprehensive analysis shows that under similar geological and engineering conditions,the wells with longer laterals emplaced in WF2-LM4 graptolitic zone generally have higher test production and estimated ultimate recovery (EUR).The research results are of referential value to the exploration and development of Wufeng-Longmaxi Formations' shale gas in Sichuan Basin and its periphery,and of the Silurian shale gas in other parts of the world.

Key words: Well JY6-2HF, Wufeng-Longmaxi Formations, shale gas, graptolitic zone, Jiaoshiba, Sichuan Basin

中图分类号:

TE122.2

聂海宽,张柏桥,刘光祥,等. 四川盆地五峰组-龙马溪组页岩气高产地质原因及启示——以涪陵页岩气田JY6-2HF为例[J]. 石油与天然气地质, 2020, 41(3): 463-473. doi: 10.11743/ogg20200303 Nie Haikuan,Zhang Baiqiao,Liu Guangxiang,et al. Geological factors contributing to high shale gas yield in the Wufeng-Longmaxi Fms of Sichuan Basin: A case study of Well JY6-2HF in Fuling shale gas field[J]. Oil & Gas Geology, 2020, 41(3): 463-473. doi: 10.11743/ogg20200303

参考文献

[1] 金之钧,胡宗全,高波,等.川东南地区五峰组-龙马溪组页岩气富集与高产控制因素[J].地学前缘,2016,23(1):1-10. Jin Zhijun,Hu Zongquan,Gao Bo,et al.Controlling factors on the enrichment and high productivity of shale gas in the Wufeng-Longmaxi Formations,southeastern Sichuan Basin[J].Earth Science Frontiers,2016,23(1):1-10.
[2] 郭旭升.南方海相页岩气"二元富集"规律——四川盆地及周缘龙马溪组页岩气勘探实践认识[J].地质学报,2014,88(7):1209-1218. Guo Xusheng.Rules of two-factor enrichiment for marine shale gas in southern China——Understanding from the Longmaxi Formation shale gas in Sichuan Basin and its surrounding area[J].Acta Geologica Sinica,2014,88(7):1209-1218.
[3] 王志刚.涪陵页岩气勘探开发重大突破与启示[J].石油与天然气地质,2015,36(1):1-6. Wang Zhigang.Breakthrough of Fuling shale gas exploration and development and its inspiration[J].Oil & Gas Geology,2015,36(1):1-6.
[4] 聂海宽,金之钧,边瑞康,等.四川盆地及其周缘上奥陶统五峰组-下志留统龙马溪组页岩气"源-盖控藏"富集[J].石油学报,2016,37(5):557-571. Nie Haikuan,Jin Zhijun,Bian Ruikang,et al.The "source-cap hydrocarbon-controlling" enrichment of shale gas in Upper Ordovician Wufeng Formation-Lower Silurian Longmaxi Formation of Sichuan Basin and its periphery[J].Acta Petrolei Sinica,2016,37(5):557-571.
[5] Jin Z J,Nie H K,Liu Q Y,et al.Source and seal coupling mechanism for shale gas enrichment in upper Ordovician Wufeng Formation-Lower Silurian Longmaxi Formation in Sichuan Basin and its periphery[J].Marine and Petroleum Geology,2018,97:78-93.
[6] 何治亮,胡宗全,聂海宽,等.四川盆地五峰组-龙马溪组页岩气富集特征与"建造-改造"评价思路[J].天然气地球科学,2017,28(5):724-733. He Zhiliang,Hu Zongquan,Nie Haikuan,et al.Characterization of shale gas enrichment in the Wufeng-Longmaxi Formation in the Sichuan Basin and its evaluation of geological construction-transformation evolution sequence[J].Natural Gas Geoscience,2017,28(5):724-733.
[7] 张金川,李玉喜,聂海宽,等.渝页1井地质背景及钻探效果[J].天然气工业,2010,30(12):114-118,134. Zhang Jinchuan,Li Yuxi,Nie Haikuan,et al.Geologic setting and drilling effect of the shale cored well Yuye-1,Penshui County of Chongqing[J].Natural Gas Industry,2010,30(12):114-118,134.
[8] 邹才能,龚剑明,王红岩,等.笔石生物演化与地层年代标定在页岩气勘探开发中的重大意义[J].中国石油勘探,2019,24(1):1-6. Zou Caineng,Gong Jianming,Wang Hongyan,et al.Importance of graptolite evolution and biostratigraphic calibration on shale gas exploration[J].China Petroleum Exploration,2019,24(1):1-6.
[9] 王红岩,郭伟,梁峰,等.宣汉-巫溪地区五峰组-龙马溪组黑色页岩生物地层特征及分层对比[J].天然气工业,2017,37(7):27-33. Wang Hongyan,Guo Wei,Liang Feng,et al.Black shale biostratigraphic characteristics and stratigraphic correlation in the Wufeng and Longmaxi Formation of the Xuanhan-Wuxi areas[J].Natural Gas Industry,2017,37(7):27-33.
[10] 陈旭,樊隽轩,张元动,等.五峰组及龙马溪组黑色页岩在扬子覆盖区内的划分与圈定[J].地层学杂志,2015,39(4):351-358. Chen Xu,Fan Juanxuan,Zhang Yuandong,et al.Subdivision and delineation of the Wufeng and Longmaxi black shales in the subsurface areas of the Yangtze platform[J].Journal of Stratigraphy,2015,39(4):351-358.
[11] 聂海宽,杜伟,王濡岳,等.四川盆地龙马溪组页岩储层演化特征研究.中国石油化工股份有限公司石油勘探开发研究院内部报告[R].北京,2020:1-208. Nie Haikuan,Du Wei,Wang Ruyue,et al.Study on the evolution characteristics of shale reservoirs in Longmaxi formation of Sichuan Basin[R].Beijing SINOPEC Exploration and Development Research Institute,2020:1-208.
[12] 聂海宽,何治亮,刘光祥,等.中国页岩气勘探开发现状与优选方向[J].中国矿业大学学报,2020,49(1):16-38. Nie Haikuan,He Zhiliang,Liu Guangxiang,et al.Status and direction of shale gas exploration and development in China[J].Journal of China University of Mining & Technology,2020,49(1):16-38.
[13] 陈旭,樊隽轩,王文卉,等.黔渝地区志留系龙马溪组黑色笔石页岩的阶段性渐进展布模式[J].中国科学:地球科学,2017,47(6):720-732. Chen Xu,Fan Juanxuan,Wang Wenhui,et al.Gradual progressive distribution pattern of black graptolite shale in silurian longmaxi formation in guizhou and chongqing area[J].Science China Earth Science,2017,47(6):720-732.
[14] 陈旭,陈清,甄勇毅,等.志留纪初宜昌上升及其周缘龙马溪组黑色笔石页岩的圈层展布模式[J].中国科学:地球科学,2018,48(9):1198-1026. Chen Xu,Chen Qing,Zhen Yongyi,et al.Circumjacent distribution pattern of the Longmaxi graptolitic black shale (early Silurian) on the Yichang Uplift and its peripheral region[J].Science China Earth Science,2018,48(9):1198-1026.
[15] 孙健,罗兵.四川盆地涪陵页岩气田构造变形特征及对含气性的影响[J].石油与天然气地质,2016,(6):809-818. Sun Jian,Luo Bing.Structural deformation and its influences on gas storage in Fuling shale gas play,the Sichuan Basin[J].Oil & Gas Geology,2016,(6):809-818.
[16] 彭勇民,龙胜祥,胡宗全,等.四川盆地涪陵地区页岩岩石相标定方法与应用[J].石油与天然气地质,2016,37(6):964-970. Peng Yongmin,Long Shengxiang,Hu Zongquan,et al.Calibration method of shale petrological facies and its application in Fuling area,the Sichuan Basin[J].Oil & Gas Geology,2016,37(6):964-970.
[17] Gradstein F M,Ogg J G,Mark S,et al.The geologic time scale 2012[J].Amsterdam:Elsevier,2012,1-1176.
[18] Nie H K,Jin Z J,Sun C X,et al.Organic matter types of the Wufeng and Longmaxi Formations in the Sichuan Basin,south China:Implications for the formation of organic matter pores[J].Energy & Fuels,2019,33(9):8076-8100.
[19] 李东晖,刘光祥,聂海宽,等.焦石坝背斜上部气层开发特征及影响因素分析[J].地球科学,2019,44(11):3653-3661. Li Donghui,Liu Guangxiang,Nie Haikuan,et al.Development characteristics and influencing factors of upper gas reservoir in Jiaoshiba anticline[J].Earth Science,2019,44(11):3653-3661.
[20] Nie H K,Jin Z J,Zhang J C.Characteristics of three organic matter pore types in the Wufeng-Longmaxi Shale of the Sichuan Basin,Southwest China[J].Scientific Reports,2018,8(1):7014.
[21] 李东晖,聂海宽.一种考虑气藏特征的页岩含气量计算方法——以四川盆地及其周缘焦页1井和彭页1井为例[J].石油与天然气地质,2019,40(6):1324-1332. Li Donghui,Nie Haikuan.A new method to calculate shale gas content based on gas reservoir characterization:A case study of Wells JY 1 and PY 1 in Sichuan Basin and its surrounding areas[J].Oil & Gas Geology,2019,40(6):1324-1332.
[22] 罗超,王兰生,石学文,等.长宁页岩气田宁211井五峰组-龙马溪组生物地层[J].地层学杂志,2017,41(2):142-152. Luo Chao,Wang Lansheng,Shi Xuewen,et al.Biostratigraphy of the wufeng to longmaxi formation at well ning 211 of changning shale gas field[J].Journal of Stratigraphy,2017,41(2):142-152.
[23] 谢军,赵圣贤,石学文,等.四川盆地页岩气水平井高产的地质主控因素[J].天然气工业,2017,37(7):1-12. Xie Jun,Zhao Shengxian,Shi Xuewen,et al.Main geological factors controlling high production of horizontal shale gas wells in the Sichuan Basin[J].Natural Gas Industry,2017,37(7):1-12.
[24] 马新华,谢军.川南地区页岩气勘探开发进展及发展前景[J].石油勘探与开发,2018,45(1):161-169. Ma Xinhua,Xie Jun.The progress and prospects of shale gas exploration and exploitation in southern Sichuan Basin,NW China[J].Petroleum Exploration and Development,2018,45(1):161-169.
[25] 聂海宽,金之钧,马鑫,等.四川盆地及邻区上奥陶统五峰组-下志留统龙马溪组底部笔石带及沉积特征[J].石油学报,2017,32(2):160-174. Nie Haikuan,Jin Zhijun,Ma Xin,et al.Graptolites zone and sedimentary characteristics of Upper Ordovician Wufeng Formation Lower Silurian Longmaxi Formation in Sichuan Basin and its adjacent areas[J].Acta Petrolei Sinica,2017,32(2):160-174.
[26] 孙莎莎,芮昀,董大忠,等.中、上扬子地区晚奥陶世-早志留世古地理演化及页岩沉积模式[J].石油与天然气地质,2018,39(6):1087-1106. Sun Shasha,Rui Yun,Dong Dazhong,et al.Paleogeographic evolution of the Late Ordovician-Early Silurian in Upper and Middle Yangtze regions and depositional model of shale[J].Oil & Gas Geology,2018,39(6):1087-1106.
[27] 戎嘉余,陈旭,王怿,等.奥陶-志留纪之交黔中古陆的变迁:证据与启示[J].中国科学:地球科学,2011,41(10):1407-1415. Rong Jiayu,Chen Xu,Wang Yi,et al.Northward expansion of Central Guizhou Oldland through the Ordovician and Silurian transition:Evidence and implications[J].Science China Earth Science,2011,41(10):1407-1415.
[28] 聂海宽,汪虎,何治亮,等.常压页岩气形成机制、分布规律及勘探前景——以四川盆地及其周缘五峰组-龙马溪组为例[J].石油学报,2019,40(02):131-143+164. Nie Haikuan,Wang Hu,He Zhiliang,et al.Formation mechanism,distribution and exploration prospect of normal pressure shale gas reservoir:A case study of Wufeng Formation-Longmaxi Formation in Sichuan Basin and its periphery[J].Acta Petrolei Sinica,2019,40(02):131-143+164.
[29] 聂海宽,李东晖,姜涛,等.基于笔石带特征的页岩等时地层测井划分方法及意义——以四川盆地及其周缘五峰组-龙马溪组为例[J].石油学报,2020,in press. Nie Haikuan,Li Donghui,Jiang Tao,et al.Logging division method and its significance of shale isochronous strata based on the characteristics of graptolitic zone,take Upper Ordovician Wufeng Formation-Lower Silurian Longmaxi Formation in Sichuan Basin and its periphery as an example[J].Acta Petrolei Sinica,2020,in press.
[30] 郭旭升.涪陵页岩气田焦石坝区块富集机理与勘探技术[M].北京:科学出版社,2014:1-346. Guo Xusheng.Enrichment region mechanism and exploration technology in Jiaoshiba of Fuling shale gas area[M].Beijing:Science Press,2014:1-346
[31] 金之钧.中国海相碳酸盐岩层系油气形成与富集规律[J].中国科学:地球科学,2011,41(07):910-926. Jin Zhijun.Formation and accumulation of oil and gas in marine carbonate strata in Chinese sedimentary basins[J].Science China Earth Science,2011,41(07):910-926.
[32] Lüning S,Craig J,Loydell D K,et al.Lower Silurian ‘hot shales’ in North Africa and Arabia:regional distribution and depositional model[J].Earth Science Reviews,2000,49(1-4):121-200.
[33] Alkhafaji M W,Aljubouri Z A,Aldobouni I A.Depositional environment of the Lower Silurian Akkas hot shales in the Western Desert of Iraq:Results from an organic geochemical study[J].Marine and Petroleum Geology,2015,64:294-303.
[34] Lüning S,Shahin Y M,Loydell D,et al.Anatomy of a world-class source rock:Distribution and depositional model of Silurian organic-rich shales in Jordan and implications for hydrocarbon potential[J].AAPG Bulletin,2005,89(10):1397-1427.