页岩含气量定量计算方法探讨——以吐哈盆地温吉桑地区中下侏罗统为例
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摘要
页岩气原地资源量定量计算对后续可动油气研究、经济性评价等起关键作用。通过对吐哈温吉桑地区中下侏罗统页岩含气性的研究,得到页岩现场解析总含气量为0.92~1.53m~3/t;计算含气量平均为1.33m~3/t,其中游离气约占47%、吸附气占49%、溶解气(包括水溶气及油溶气)占4%。研究认为,对应现场解析损失气的恢复,当损失时间较大时,直线恢复值比实际值小,多项式恢复值比实际值大,故使用直线、多项式恢复值的均方根值为损失量更合理。为了计算吸附气,引入吸附气饱和度(ε)概念,可以帮助理解吸附气在地质条件下的不饱和现象,使吸附气含量计算更符合地下实际。
Quantitative calculation of shale gas in place(GIP)is a key aspect of the following mobility evaluation of gas,or economic evaluation.This paper studiesthe shale gas content,and reaches following conclusions.Desorption total gas content rank is 0.92-1.53m~3/t;mean calculation value is 1.33m~3/t,in which free gas accounts for 47%,adsorption gas of 49%,and solution gas of 4%.As for the lost gas correction,when the lost time is too long,linear correct value is lower than reality,meanwhile,polynomial correct value is higher.Consequently,this paper uses root mean square as the lost gas.As for theadsorption,this paper introduces the concept of"CH_4 adsorption saturation",which gives a profound idea of under-saturation in geological condition,and the calculation will be more accurate.
Quantitative calculation of shale gas in place(GIP)is a key aspect of the following mobility evaluation of gas,or economic evaluation.This paper studiesthe shale gas content,and reaches following conclusions.Desorption total gas content rank is 0.92-1.53m~3/t;mean calculation value is 1.33m~3/t,in which free gas accounts for 47%,adsorption gas of 49%,and solution gas of 4%.As for the lost gas correction,when the lost time is too long,linear correct value is lower than reality,meanwhile,polynomial correct value is higher.Consequently,this paper uses root mean square as the lost gas.As for theadsorption,this paper introduces the concept of"CH_4 adsorption saturation",which gives a profound idea of under-saturation in geological condition,and the calculation will be more accurate.
引文
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[2]Zou Caineng,Dong Dazhong,Wang Shejiao,et al.Geological characteristics,formation mechanism and resource potential of shale gas in China[J].Petroleum Exploration and Development,2010,37(6):641-653.[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.]
[3]EIA.Shale gas and the outlook for U.S.natural gas market and global gas resources[EB/OL].[2011-06-11].http://www.eia.gov/reports.
[4]Xu Bo,Li Jinghan,Xie Dong,et al.Distribution of shale gas resources in CNPC exploration area[J].Special Oil and Gas Reservoirs,2011,18(4):1-6.[徐波,李敬含,谢东,等.中石油探区主要盆地页岩气资源分布特征研究[J].特种油气藏,2011,18(4):1-6.]
[5]Tang Ying,Zhang Jinchuan,Liu Zhujiang,et al.Use and improvement of the desorption method in shale gas content tests[J].Natural Gas Industry,2011,31(10):108-112.[唐颖,张金川,刘珠江,等.解吸法测量页岩含气量及其方法的改进[J].天然气工业,2011,31(10):108-112.]
[6]Liu Honglin,Deng Ze,Liu Dexun,et al.Discussion on lost gas calculating methods in shale gas content testing[J].Oil Drilling&Production Technology,2010,32(B11):156-158.[刘洪林,邓泽,刘德勋,等.页岩含气量测试中有关损失气量估算方法[J].石油钻采工艺,2010,32(B11):156-158.]
[7]Strapoc D,Mastalerz M,Schimmelmann A,et al.Geochemical constraints on the origin and volume of gas in the New Albany Shale(Devonian-Mississippian),eastern Illinois Basin[J].AAPG Bulletin,2010,94(11):1713-1740.
[8]Mardon S M,Eble C F,Hower J C,et al.Organic petrology,geochemistry,gas content and gas composition of Middle Pennsylvanian age coal beds in the Eastern Interior(Illinois)Basin:Implications for CBM development and carbon sequestration[J].International Journal of Coal Geology,2014,127:56-74.
[9]Fang Chaohe,Huang Zhilong,Wang Qiaozhi,et al.Cause andsignificance of the ultra-low water saturation in gas-enriched shale reservoir[J].Natural Gas Geoscience,2014,25(3):471-476.[方朝合,黄志龙,王巧智,等.富含气页岩储层超低含水饱和度成因及意义[J].天然气地球科学,2014,25(3):471-476.]
[10]Liu Honglin,Wang Hongyan.Ultra-low water saturation characteristics and the identification of over-pressured play fairway of marine shale in south China[J].Natural Gas Industry,2013,33(7):140-144.[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.]
[11]Huang Xiaoping,Chai Jing.A practical discussion on oil saturation calculation using Archie formula in shale formation:Example from lower Sha3member of Zhanhua Sag[J].Petroleum Geology and Recovery Efficiency,2014,21(4):59-62.[黄小平,柴婧.阿尔奇公式在泥页岩地层含油饱和度计算中的应用——以沾化凹陷沙三段下亚段为例[J].油气地质与采收率,2014,21(4):59-62.]
[12]Zhao Minghai,Fu Aibing,Guan Li,et al.Logging evaluation method of shale oil and gasreservoir in Luojia area[J].Petroleum Geology and Recovery Efficiency,2012,19(6):20-24.[赵铭海,傅爱兵,关丽,等.罗家地区页岩油气测井评价方法[J].油气地质与采收率,2012,19(6):20-24.]
[13]Wang Min.Analysis of shale fluid experiment data[J].Petroleum Geology&Experiment,2013,35(2):199-201.[王敏.泥页岩地层孔隙流体实验数据分析[J].石油实验地质,2013,35(2):199-201.]
[14]Wirth O,Bastian P.Reservoir Characterization of the Montney in Blair/Kobes area of NE,British Columbia[R/OL].[2011-04-05].http://ugresources.com/Portals/68/Reservoir%20Characterization%20of%20the%20Montney%20in%20Blair%20Creek.pdf.
[15]Saghafi A.Potential for ECBM and CO2storage in mixed gas Australian coals[J].International Journal of Coal Geology,2010,82(3):240-251.
[16]Day S,Sakurovs R,Weir S.Supercritical gas sorption on moist coals[J].International Journal of Coal Geology,2008,74(3):203-214.
[17]Weniger P,Kalkreuth W,Busch A,et al.High-pressure methane and carbon dioxide sorption on coal and shale samples from the ParanáBasin,Brazil[J].International Journal of Coal Geology,2010,84(3):190-205.
[18]Chareonsuppanimit P,Mohammad S A,Robinson R L,et al.High-pressure adsorption of gases on shales:Measurements and modeling[J].International Journal of Coal Geology,2012,95:34-46.
[19]Mares T E,Moore T A,Moore C R.Uncertainty of gas saturation estimates in a subbituminous coal seam[J].International Journal of Coal Geology,2009,77(3):320-327.
[20]Heller R,Zoback M.Adsorption of methane and carbon dioxide on gas shale and pure mineral samples[J].Journal of Unconventional Oil and Gas Resources,2014,8:14-24.
[21]Barker C E,Dallegge T A,Clark A C.USGS Coal Desorption Equipment and a Spreadsheet for Analysis of Lost and Total Gas from Canister Desorption Measurements[M].Virginia:US Geological Survey,2003.
[22]Ross D J K,Bustin R M.Characterizing the shale gas resource potential of Devonian-Mississippian strata in the Western Canada sedimentary basin:Application of an integrated formation evaluation[J].AAPG Bulletin,2008,92(1):87-125.
[23]Bowker K A.Barnett Shale gas production,Fort Worth Basin:Issues and discussion[J].AAPG Bulletin,2007,91(4):523-533.
[24]Ji W,Song Y,Jiang Z,et al.Geological controls and estimation algorithms of lacustrine shale gas adsorption capacity:A case study of the Triassic strata in the southeastern Ordos Basin,China[J].International Journal of Coal Geology,2014,134:61-73.
[25]Xu Bo,Li Jinghan,Li Xiaoge,et al.Evaluation of hydrocarbon accumulation conditions for shale gas from the Eastern Sag of the Liaohe Oilfield and its gas-bearing properties[J].Acta Petrolei Sinica,2011,32(3):450-458.[徐波,李敬含,李晓革,等.辽河油田东部凹陷页岩气成藏条件及含气性评价[J].石油学报,2011,32(3):450-458.]
[26]Lin Tuo,Zhang Jinchuan,Bao Shujing,et al.The optimum selecting of shale gas well location and gas content of Lower Cambrian,Northwest Hunan:A case study of well Changye[J].Natural Gas Geoscience,2015,26(2):312-319.[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.]
[27]Bi He,Jiang Zhenxue,Li Peng,et al.Shalereservoir characteristics and its influence on gas content of Wufeng-Longmaxi Formation in the southeast Chongqing[J].Natural Gas Geoscience,2014,25(8):1275-1283.[毕赫,姜振学,李鹏,等.渝东南地区黔江凹陷五峰组—龙马溪组页岩储层特征及其对含气量的影响[J].天然气地球科学,2014,25(8):1275-1283.]
[28]Zhang Shihuan,Ren Zhanli,Ma Tuanxiao,et al.Research on the relations between present temperature and oil-gas generation in Tulufan-Hami Basin[J].Scientia Geologica Sinica,2000,35(4):432-440.[张世焕,任战利,马团校,等.吐鲁番—哈密盆地现今地温与油气关系研究[J].地质科学,2000,35(4):432-440.]
[29]Hao Shisheng.Thecharacteristic of the solubility of natural gas in formation water and it’s geologic significance[J].Acta Petrolei Sinica,1993,14(2):12-22.[郝石生.天然气在地层水中的溶解度变化特征及地质意义[J].石油学报,1993,14(2):12-22.]
[30]Fan Hongche,Huang Zhilong,Yuan Jian,et al.Solubility experiment of methane-rich gas and features of segregation and accumulation[J].Journal of Jilin University:Earth Science Edition,2011,41(4):1033-1039.[范泓澈,黄志龙,袁剑,等.富甲烷天然气溶解实验及水溶气析离成藏特征[J].吉林大学学报:地球科学版,2011,41(4):1033-1039.]
[31]Standing M B.A Pressure-volume-temperature correlation for mixtures of California oil and gases[J].API Drilling and Production Practice,1947:275-287.
[32]Lasater J A.Bubble point pressure correlation[J].Trans AIME,1958,213:379-381.
[33]Vasquez M,Beggs H D.Correlations for fluid physical property prediction[J].Journal Petroleum Technology,1980:968-970.
[34]Xue Haitao,Liu Lingzhi.Solubility of natural gas in Daqing crude oil[J].Journal of Daqing Petroleum Institute,2001,25(2):12-15.[薛海涛,刘灵芝.天然气在大庆原油中的溶解度[J].大庆石油学院学报,2001,25(2):12-15.]
[35]Xue Haitao,Lu Shuangfang,Fu Xiaotai,et al.Prediction of model accuracy of the oil-gas volume ratio in crude oil[J].Journal of Daqing Petroleum Institute,2004,28(1):1-3.[薛海涛,卢双舫,付晓泰,等.预测原油中气油体积比的模型精度[J].大庆石油学院学报,2004,28(1):1-3.]
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