武威盆地上石炭统羊虎沟组页岩气成藏条件
|
摘要
武威盆地上石炭统羊虎沟组是中小盆地海陆过渡相泥页岩层系的典型代表,分析其页岩气成藏条件对揭示该区页岩气潜力和勘探方向具有重要意义。对野外露头和钻井样品进行了采集,并分析了泥页岩的发育特征、有机地球化学、储层物性和含气性。结果表明,羊虎沟组泥页岩单层厚度薄、累计厚度大、连续性差;有机质丰度高、热成熟度适中、类型以Ⅱ_1～Ⅱ_2型为主。Pr/nC_(17)和Ph/nC_(18)相关性揭示羊虎沟组泥页岩形成于还原性较强的沉积环境。矿物组成以黏土矿物为主,质量分数为28.5%～73.4%,平均为53.07%,其次是石英和少量的菱铁矿。孔隙类型主要为有机质孔和微裂缝,钻井样品的平均孔隙度为4.89%,渗透率主要分布在0.001×10~(-3)～0.1×10~(-3)μm~2,比表面积介于4.74～22.29 m~2/g。2个钻井样品的解析气含量分别为2.19 cm~3/g和2.39 cm~3/g,气体组成以CH_4为主;泥页岩甲烷等温吸附量为0.68～8.57 cm~3/g。TOC和R_o是武威地区海陆过渡相泥页岩物性和含气能力的主控因素,伊蒙混层含量的增加也可使泥页岩孔隙度和含气能力轻微增加。
The Upper Carboniferous Yanghugou Formation shale gas in the Wuwei Basin is a representative shale gas of the marine-continental transitional shale in small and medium basins, and analyzing the shale gas accumulation conditions is of great significance to reveal the shale gas potential and exploration direction in this area. This paper analyses the shale distribution, organic geochemistry, reservoir characteristics and gas-bearing properties of the Yanghugou Formation through field geology, drilling sample collection and analytical testing. The results show that the shale of the Yanghugou Formation is thin and the cumulative thickness is large with a poor continuity. The organic matter abundance is relatively high, showing the shale has already entered a high maturity stage. The organic matter is mainly type Ⅱ_1-Ⅱ_2. The correlation between Pr/nC_(17) and Ph/nC_(18) reveals that the Yanghugou Formation shale formed in a relatively reductive sedimentary environment. The mineral composition is dominated by clay mineral with a mass fraction of 28.5%-73.4%,with an average of 53.07%,followed by quartz and a small amount of siderite.Organic pores and micro-fractures are dominated pore types in the Yanghugou Formation shale,with averaged porosity of 4.89% for the drilling shale samples, and permeability mainly distributed within 0.001×10~(-3)-0.1×10~(-3) μm~2, and a specific surface area of 4.74-22.29 m~2/g.Two drilling samples have desorbed gas content of 2.19 and 2.39 cm~3/g, with main composition being CH_4.The methane adsorption capacity ranges from 0.68 to 8.57 cm~3/g. TOC and R_o are the main controlling factors of the physical property and gas-bearing capacity of the marine-continental transitional shale in Wuwei Basin,and the porosity and gas-bearing capacity of the shale could also slightly increase with increasing of the content of I/S content.
The Upper Carboniferous Yanghugou Formation shale gas in the Wuwei Basin is a representative shale gas of the marine-continental transitional shale in small and medium basins, and analyzing the shale gas accumulation conditions is of great significance to reveal the shale gas potential and exploration direction in this area. This paper analyses the shale distribution, organic geochemistry, reservoir characteristics and gas-bearing properties of the Yanghugou Formation through field geology, drilling sample collection and analytical testing. The results show that the shale of the Yanghugou Formation is thin and the cumulative thickness is large with a poor continuity. The organic matter abundance is relatively high, showing the shale has already entered a high maturity stage. The organic matter is mainly type Ⅱ_1-Ⅱ_2. The correlation between Pr/nC_(17) and Ph/nC_(18) reveals that the Yanghugou Formation shale formed in a relatively reductive sedimentary environment. The mineral composition is dominated by clay mineral with a mass fraction of 28.5%-73.4%,with an average of 53.07%,followed by quartz and a small amount of siderite.Organic pores and micro-fractures are dominated pore types in the Yanghugou Formation shale,with averaged porosity of 4.89% for the drilling shale samples, and permeability mainly distributed within 0.001×10~(-3)-0.1×10~(-3) μm~2, and a specific surface area of 4.74-22.29 m~2/g.Two drilling samples have desorbed gas content of 2.19 and 2.39 cm~3/g, with main composition being CH_4.The methane adsorption capacity ranges from 0.68 to 8.57 cm~3/g. TOC and R_o are the main controlling factors of the physical property and gas-bearing capacity of the marine-continental transitional shale in Wuwei Basin,and the porosity and gas-bearing capacity of the shale could also slightly increase with increasing of the content of I/S content.
引文
[1] 董大忠,邹才能,杨桦,等.中国页岩气勘探开发进展与发展前景[J].石油学报,2012,33(增刊1):107-114.
[2] 郭少斌,付娟娟,高丹,等.中国海陆交互相页岩气研究现状与展望[J].石油实验地质,2015,37(5):535-540.
[3] 郭彤楼,张汉荣.四川盆地焦石坝页岩气田形成与富集高产模式[J].石油勘探与开发,2014,41(1):28-36.
[4] 刘方圆.涪陵页岩气田焦页XHF井生产动态分析及建议[J].地质科技情报,2018,37(3):196-201.
[5] 郭旭升,胡东风,李宇平,等.海相和湖相页岩气富集机理分析与思考:以四川盆地龙马溪组和自流井组大安寨段为例[J].地学前缘,2016,23(2):18-28.
[6] 王香增,张丽霞,李宗田,等.鄂尔多斯盆地延长组陆相页岩孔隙类型划分方案及其油气地质意义[J].石油与天然气地质,2016,37(1):1-7.
[7] 包书景,林拓,聂海宽,等.海陆过渡相页岩气成藏特征初探:以湘中坳陷二叠系为例[J].地学前缘,2016,23(1):44-53.
[8] 闫德宇,黄文辉,陆小霞,等.下扬子区海陆过渡相不同沉积环境页岩气成藏条件对比[J].煤炭学报,2016,41(7):1778-1787.
[9] 吴小力,李荣西,李尚儒,等.下扬子地区海陆过渡相页岩气成藏条件与主控因素:以萍乐坳陷二叠系乐平组为例[J].地质科技情报,2018,37(1):160-168.
[10] 邹才能,董大忠,王社教,等.中国页岩气形成机理、地质特征及资源潜力[J].石油勘探与开发,2010,37(6):641-653.
[11] 赵可英,郭少斌.海陆过渡相页岩气储层孔隙特征及主控因素分析:以鄂尔多斯盆地上古生界为例[J].石油实验地质,2015,37(2):141-149.
[12] 唐玄,张金川,丁文龙,等.鄂尔多斯盆地东南部上古生界海陆过渡相页岩储集性与含气性[J].地学前缘,2016,23(2):147-157.
[13] 孙则朋,王永莉,魏志福,等.海陆过渡相页岩含气性及气体地球化学特征:以鄂尔多斯盆地山西组页岩为例[J].中国矿业大学学报,2017,46(4):859-868.
[14] Xiong F Y,Jiang Z X,Li P,et al.Pore structure of transitional shales in the Ordos Basin,NW China:Effects of composition on gas storage capacity[J].Fuel,2017,206(10):504-515.
[15] Yang C,Zhang J C,Tang X,et al.Comparative study on micro-pore structure of marine,terrestrial,and transitional shales in key areas,China[J].International Journal of Coal Geology,2017,171(2):76-92.
[16] 陈晶,黄文辉,陆小霞,等.沁水盆地柿庄地区构造煤定量分析及其物性特征[J].煤炭学报,2017,42(3):732-737.
[17] 张成功,马代兵.甘肃武威盆地海子滩地区太原组页岩储层特征研究[J].中国煤炭地质,2015,40(9):33-36.
[18] 阎存凤,袁剑英.武威盆地石炭系沉积环境及含油气远景[J].天然气地球科学,2011,22(2):267-274.
[19] 邢徐娇,胡明,尹鹏,等.武威盆地石炭系致密砂岩气勘探前景分析[J].特种油气藏,2014,21(1):35-37.
[20] 杜治利,田亚,陈夷.甘肃武威盆地儿马湖凹陷探获油气[J].中国地质,2017,44(1):190-191.
[21] Hill R J,Jarvie D M,Zumberge J,et al.Oil and gas geochemistry and petroleum systems of the Fort Worth Basin[J].AAPG Bulletin,2007,91(4):445-473.
[22] Loucks R G,Reed R M,Ruppel S C,et al.Spectrum of pore types and networks in mudrocks and a descriptive classification for matrix-related mudrock pores[J].AAPG Bulletin,2012,96(6):1071-1098.
[23] Chalmers G R,Bustin R M,Power I M.Characterization of gas shale pore systems by porosimetry,pycnometry,surface area,and field emission scanning electron microscopy/transmission electron microscopy image analyses:Examples from the Barnett,Woodford,Haynesville,Marcellus,and Doig unit[J].AAPG Bulletin,2012,96(6):1099-1119.
[24] Curtis M E,Cardott B J,Sondergeld C H,et al.Development of organic porosity in the Woodford Shale with increasing thermal maturity[J].International Journal of Coal Geology,2012,103(23):26-31.
[25] 蒋裕强,董大忠,漆麟,等.页岩气储层的基本特征及其评价[J].天然气工业,2010,30(10):7-12.
[26] 李昂,丁文龙,张国良,等.滇东地区马龙区块筇竹寺组海相页岩储层特征及对比研究[J].地学前缘,2016,23(2):176-189.
[27] 武瑾,梁峰,吝文,等.渝东北地区巫溪2井五峰组-龙马溪组页岩气储层及含气性特征[J].石油学报,2017,38(5):512-524.
[28] 张晓明,石万忠,徐清海,等.四川盆地焦石坝地区页岩气储层特征及控制因素[J].石油学报,2015,36(8):926-939.
[29] 曾维特,张金川,丁文龙,等.延长组陆相页岩含气量及其主控因素:以鄂尔多斯盆地柳坪171井为例[J].天然气地球科学,2014,25(2):291-301.
[30] 昝博文,刘树根,白志强,等.川西南威远地区龙马溪组页岩储层孔隙发育特征及控制因素分析[J].地质科技情报,2017,36(2):65-74.
[31] Milliken K L,Rudnicki M,Awwiller D N,et al.Organic matter-hosted pore system,Marcellus Formation (Devonian),Pennsylvania[J].AAPG Bulletin,2013,97(2):177-200.
[32] 代旭光,王猛.鄂尔多斯东南缘海陆交互相页岩储层特征及含气性[J].科学技术与工程,2017,17(15):26-32.
[33] Chalmers G R L,Bustin R M.Lower Cretaceous gas shales in northeastern British Columbia,Part I:Geological controls on methane sorption capacity[J].Bulletin of Canadian Petroleum Geology,2008,56(1):1-21.
[34] Lu X C,Li F C,Watson A T.Adsorption measurements in Devonian shales[J].Fuel,1995,74(4):599-603.
[35] Schettler P,Parmoly C.The measurement of gas desorption isotherms for Devonian shale[J].GRI Devonian Gas Shale Technology Review,1990,7(1):4-9.
[2] 郭少斌,付娟娟,高丹,等.中国海陆交互相页岩气研究现状与展望[J].石油实验地质,2015,37(5):535-540.
[3] 郭彤楼,张汉荣.四川盆地焦石坝页岩气田形成与富集高产模式[J].石油勘探与开发,2014,41(1):28-36.
[4] 刘方圆.涪陵页岩气田焦页XHF井生产动态分析及建议[J].地质科技情报,2018,37(3):196-201.
[5] 郭旭升,胡东风,李宇平,等.海相和湖相页岩气富集机理分析与思考:以四川盆地龙马溪组和自流井组大安寨段为例[J].地学前缘,2016,23(2):18-28.
[6] 王香增,张丽霞,李宗田,等.鄂尔多斯盆地延长组陆相页岩孔隙类型划分方案及其油气地质意义[J].石油与天然气地质,2016,37(1):1-7.
[7] 包书景,林拓,聂海宽,等.海陆过渡相页岩气成藏特征初探:以湘中坳陷二叠系为例[J].地学前缘,2016,23(1):44-53.
[8] 闫德宇,黄文辉,陆小霞,等.下扬子区海陆过渡相不同沉积环境页岩气成藏条件对比[J].煤炭学报,2016,41(7):1778-1787.
[9] 吴小力,李荣西,李尚儒,等.下扬子地区海陆过渡相页岩气成藏条件与主控因素:以萍乐坳陷二叠系乐平组为例[J].地质科技情报,2018,37(1):160-168.
[10] 邹才能,董大忠,王社教,等.中国页岩气形成机理、地质特征及资源潜力[J].石油勘探与开发,2010,37(6):641-653.
[11] 赵可英,郭少斌.海陆过渡相页岩气储层孔隙特征及主控因素分析:以鄂尔多斯盆地上古生界为例[J].石油实验地质,2015,37(2):141-149.
[12] 唐玄,张金川,丁文龙,等.鄂尔多斯盆地东南部上古生界海陆过渡相页岩储集性与含气性[J].地学前缘,2016,23(2):147-157.
[13] 孙则朋,王永莉,魏志福,等.海陆过渡相页岩含气性及气体地球化学特征:以鄂尔多斯盆地山西组页岩为例[J].中国矿业大学学报,2017,46(4):859-868.
[14] Xiong F Y,Jiang Z X,Li P,et al.Pore structure of transitional shales in the Ordos Basin,NW China:Effects of composition on gas storage capacity[J].Fuel,2017,206(10):504-515.
[15] Yang C,Zhang J C,Tang X,et al.Comparative study on micro-pore structure of marine,terrestrial,and transitional shales in key areas,China[J].International Journal of Coal Geology,2017,171(2):76-92.
[16] 陈晶,黄文辉,陆小霞,等.沁水盆地柿庄地区构造煤定量分析及其物性特征[J].煤炭学报,2017,42(3):732-737.
[17] 张成功,马代兵.甘肃武威盆地海子滩地区太原组页岩储层特征研究[J].中国煤炭地质,2015,40(9):33-36.
[18] 阎存凤,袁剑英.武威盆地石炭系沉积环境及含油气远景[J].天然气地球科学,2011,22(2):267-274.
[19] 邢徐娇,胡明,尹鹏,等.武威盆地石炭系致密砂岩气勘探前景分析[J].特种油气藏,2014,21(1):35-37.
[20] 杜治利,田亚,陈夷.甘肃武威盆地儿马湖凹陷探获油气[J].中国地质,2017,44(1):190-191.
[21] Hill R J,Jarvie D M,Zumberge J,et al.Oil and gas geochemistry and petroleum systems of the Fort Worth Basin[J].AAPG Bulletin,2007,91(4):445-473.
[22] Loucks R G,Reed R M,Ruppel S C,et al.Spectrum of pore types and networks in mudrocks and a descriptive classification for matrix-related mudrock pores[J].AAPG Bulletin,2012,96(6):1071-1098.
[23] Chalmers G R,Bustin R M,Power I M.Characterization of gas shale pore systems by porosimetry,pycnometry,surface area,and field emission scanning electron microscopy/transmission electron microscopy image analyses:Examples from the Barnett,Woodford,Haynesville,Marcellus,and Doig unit[J].AAPG Bulletin,2012,96(6):1099-1119.
[24] Curtis M E,Cardott B J,Sondergeld C H,et al.Development of organic porosity in the Woodford Shale with increasing thermal maturity[J].International Journal of Coal Geology,2012,103(23):26-31.
[25] 蒋裕强,董大忠,漆麟,等.页岩气储层的基本特征及其评价[J].天然气工业,2010,30(10):7-12.
[26] 李昂,丁文龙,张国良,等.滇东地区马龙区块筇竹寺组海相页岩储层特征及对比研究[J].地学前缘,2016,23(2):176-189.
[27] 武瑾,梁峰,吝文,等.渝东北地区巫溪2井五峰组-龙马溪组页岩气储层及含气性特征[J].石油学报,2017,38(5):512-524.
[28] 张晓明,石万忠,徐清海,等.四川盆地焦石坝地区页岩气储层特征及控制因素[J].石油学报,2015,36(8):926-939.
[29] 曾维特,张金川,丁文龙,等.延长组陆相页岩含气量及其主控因素:以鄂尔多斯盆地柳坪171井为例[J].天然气地球科学,2014,25(2):291-301.
[30] 昝博文,刘树根,白志强,等.川西南威远地区龙马溪组页岩储层孔隙发育特征及控制因素分析[J].地质科技情报,2017,36(2):65-74.
[31] Milliken K L,Rudnicki M,Awwiller D N,et al.Organic matter-hosted pore system,Marcellus Formation (Devonian),Pennsylvania[J].AAPG Bulletin,2013,97(2):177-200.
[32] 代旭光,王猛.鄂尔多斯东南缘海陆交互相页岩储层特征及含气性[J].科学技术与工程,2017,17(15):26-32.
[33] Chalmers G R L,Bustin R M.Lower Cretaceous gas shales in northeastern British Columbia,Part I:Geological controls on methane sorption capacity[J].Bulletin of Canadian Petroleum Geology,2008,56(1):1-21.
[34] Lu X C,Li F C,Watson A T.Adsorption measurements in Devonian shales[J].Fuel,1995,74(4):599-603.
[35] Schettler P,Parmoly C.The measurement of gas desorption isotherms for Devonian shale[J].GRI Devonian Gas Shale Technology Review,1990,7(1):4-9.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |