湘鄂西地区下寒武统牛蹄塘组页岩气聚集条件及含气性影响因素
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摘要
以钻井、野外露头测量、实验测试数据为资料依据,通过对湘鄂西地区下寒武统牛蹄塘组页岩有机碳含量、热演化程度、矿物含量、储集特征等的分析,认为牛蹄塘组页岩全区分布,富有机质页岩发育于牛蹄塘组中下部,分布稳定,厚度介于40~150m之间;有机碳含量高,介于2.0%~14.64%之间;热演化程度高,主体大于2.0%以上,综合评价页岩品质好。等温吸附实验表明,牛蹄塘组页岩具有较强的天然气吸附能力。现场解吸实验表明,牛蹄塘组含气量整体偏低且氮气含量高。多期构造运动的改造和大型通天断层的发育是影响牛蹄塘组页岩含气性的主要因素,过高的热演化程度对含气性亦有一定影响。
Based on the comprehensive evaluation of drilling, field outcrops and experimental test data, the shale in Lower Cambrian Niutitang Formation in western Hu'nan and Hubei is of good quality. The organic-rich shale in the middle and lower parts of Niutitang Formation has a large thickness(40~150 m), high organic carbon content(2.0%~14.64%), and high degree of thermal evolution(Romainly more than 2.0%). Isothermal adsorption experiments show that Niutitang shale has a strong natural gas adsorption capacity. Field desorption experiments show that the overall gas content in Niutitang Formation is low but the nitrogen content is high. According to the comprehensive analysis, the multiple phases of tectonic movement and large-scale faults are the main factors affecting the gas-bearing capacity of Niutitang shale, while the excessive thermal evolution is a secondary factor.
Based on the comprehensive evaluation of drilling, field outcrops and experimental test data, the shale in Lower Cambrian Niutitang Formation in western Hu'nan and Hubei is of good quality. The organic-rich shale in the middle and lower parts of Niutitang Formation has a large thickness(40~150 m), high organic carbon content(2.0%~14.64%), and high degree of thermal evolution(Romainly more than 2.0%). Isothermal adsorption experiments show that Niutitang shale has a strong natural gas adsorption capacity. Field desorption experiments show that the overall gas content in Niutitang Formation is low but the nitrogen content is high. According to the comprehensive analysis, the multiple phases of tectonic movement and large-scale faults are the main factors affecting the gas-bearing capacity of Niutitang shale, while the excessive thermal evolution is a secondary factor.
引文
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[25]聂海宽,包书景,高波,等.四川盆地及其周缘下古生界页岩气保存条件研究[J].地学前缘,2012,19(3):280-294.
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[27]李登华,李建忠,王社教,等.页岩气藏形成条件分析[J].天然气工业,2009,29(5):22-26.
[28]范文斐,侯读杰,梁钰.中国南方页岩气牛蹄塘组与龙马溪组成藏条件对比研究---以渝东南地区为例[J].科学技术与工程,2015,15(27):13-22.
[2]刘洪林,王红岩.中国南方海相页岩超低含水饱和度特征及超压核心区选择指标[J].天然气工业,2013,33(7):140-144.
[3]程克明,王世谦,董大忠,等.上扬子区下寒武统筇竹寺组页岩气成藏条件[J].天然气工业,2009,29(5):40-44.
[4]聂海宽,张金川,李玉喜.四川盆地及其周缘下寒武统页岩气聚集条件[J].石油学报,2011,32(6):959-967.
[5]胡明毅,邓庆杰,胡忠贵.上扬子地区下寒武统牛蹄塘组页岩气成藏条件[J].石油与天然气地质,2014,35(2):272-279.
[6]李凯,李礼.湘鄂西地区下寒武统页岩气成藏地质条件[J].江汉石油科技,2015,25(2):7-10.
[7]龙幼康.中扬子地区下古生界页岩气的勘探潜力[J].地质通报,2011,30(2/3):344-348.
[8]陈波,兰正凯.上扬子地区下寒武统页岩气资源潜力[J].中国石油勘探,2009,14(3):9-14.
[9]岳来群,康永尚,陈清礼,等.贵州地区下寒武统牛蹄塘组页岩气潜力分析[J].新疆石油地质,2013,34(2):123-128.
[10]王鹏万,邹辰,刘月早,等.湘鄂西地区鹤峰区块页岩气勘探前景评价[J].地质科技情报,2014,33(6):104-109.
[11]王佳,李小刚,黄文明.湘鄂西-渝东地区牛蹄塘组页岩气勘探前景评价[J].地质科技情报,2014,23(4):98-102.
[12]燕继红,李启桂,朱祥.四川盆地及周缘下寒武统页岩气成藏主控因素与勘探方向[J].石油实验地质,2016,38(4):445-452.
[13]王阳,陈洁,胡琳,等.沉积环境对页岩气储层的控制作用---以中下扬子区下寒武统筇竹寺组为例[J].煤炭学报,2013,38(5):845-850.
[14]王玉芳,冷济高,李鹏,等.黔东北地区下寒武统牛蹄塘组页岩气特征及主控因素分析[J].古地理学报,2016,18(4):605-614.
[15]李海,白云山,王保忠,等.湘鄂西地区下古生界页岩气保存条件[J].油气地质与采收率,2014,21(6):22-25.
[16]周庆华,宋宁,王成章,等.湖南常德地区牛蹄塘组页岩特征及含气性[J].天然气地球科学,2015,26(2):302-311.
[17]杨飞,叶建中.川东南-湘鄂西地区构造特征与页岩气勘探潜力[M].武汉:中国地质大学出版社,2011:1-124.
[18]Bowker K A.Barnett Shale gas production,Fort Worth Basin:Issues and discussion[J].AAPG Bulletin,2007,91(4):523-533.
[19]Ross D J K,Bustin R M.Impact of mass balance calculations on adsorption capacities in microporous shale gas reservoirs[J].Fuel,2007,86(17):2696-2706.
[20]王濡岳,丁文龙,龚大建,等.黔北地区海相页岩气保存条件---以贵州岑巩区块下寒武统牛蹄塘组为例[J].石油与天然气地质,2016,37(1):45-55.
[21]林拓,张金川,包书景,等.湘西北下寒武统牛蹄塘组页岩气井位优选及含气性特征---以常页1井为例[J].天然气地球科学,2015,26(2):312-319.
[22]马永生,楼章华,郭彤楼,等.中国南方海相地层油气保存条件综合评价技术体系探讨[J].地质学报,2006,80(3):406-416.
[23]陈玉明,高星星,盛贤才.湘鄂西地区构造演化特征及成因机理分析[J].石油地球物理勘探,2013,48(增刊1):157-162.
[24]沃玉进,周雁,肖开华.中国南方海相层系埋藏史类型与生烃演化模式[J].沉积与特提斯地质,2007,27(3):94-100.
[25]聂海宽,包书景,高波,等.四川盆地及其周缘下古生界页岩气保存条件研究[J].地学前缘,2012,19(3):280-294.
[26]Pollastro R M,Daniel M J,Ronald J H,et al.Geologic framework of the Mississippian Barnett Shale,Barnett-Paleozoic total petroleum system,Bend Arch-Fort Worth Basin,Texas[J].AAPG Bulletin,2007,91(4):405-436.
[27]李登华,李建忠,王社教,等.页岩气藏形成条件分析[J].天然气工业,2009,29(5):22-26.
[28]范文斐,侯读杰,梁钰.中国南方页岩气牛蹄塘组与龙马溪组成藏条件对比研究---以渝东南地区为例[J].科学技术与工程,2015,15(27):13-22.