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1、2014年4月大慶石油地質(zhì)與開發(fā)Apr.,2014第33卷第2期PetroleumGeologyandOilfieldDevelopmentinDaqingVo1.33No.2DOI:10.3969/J.ISSN.1000.3754.2014.02.008疏松天然氣儲層保壓巖心氣體飽和度實驗技術曲斌劉玉陳志敏(大慶油田有限責任公司勘探開發(fā)研究院,黑龍江大慶163712)摘要:含氣飽和度是氣藏儲量計算、儲層評價的核心參數(shù),更是儲量參數(shù)研究中的難點,采用常規(guī)巖心分析技術無法準確地獲取疏松巖心氣體飽和度參數(shù)。通過對疏松保壓巖心的超低溫冷凍、流體收集、儲層參數(shù)恢復、物性參數(shù)分析等技術研究,建立
2、了疏松保壓巖心氣體飽和度分析技術,能夠準確地獲得儲層氣、水飽和度參數(shù)。在TB6.xl井實際應用中,求取儲層巖石最大含氣飽和度在75%以上,而且分析數(shù)據(jù)顯示了不同巖性具有不同的氣、水飽和度,飽和度總和在95%以上,真實地反映了天然氣儲層氣、水分布規(guī)律,體現(xiàn)了技術的準確性與可行性。通過該井巖心分析弄清了儲層不同巖性氣水分布特征,為開展二次測井解釋和建立測井解釋圖版奠定了基礎。關鍵詞:疏松巖心;氣飽和度;氣、水分布;實驗技術中圖分類號:TE311文獻標識碼:A文章編號:1000—3754(2014)02-0035—07EXPERIMENTALTECHNIQUEoFTHEGASSATURATI
3、oNFoRTHEPRESSURECoREINUNCoNSoLIDATEDNATURALGASRESERVoIRQuBin,LIUYu,CHENZhimin(ExplorationandDevelopmentResearchInstituteofDaqingOilfieldCompanyLtd.,Daqing163712,China)Abstract:Gassaturationisthecoreparameterofthereservecalculationandreservoirevaluationforgasreservoir,andmoreoveritisthestudydific
4、ultyofthereservesparameters,thegassaturationparameterinaloosecorecannotbeaccuratelyobtainedbymeansoftheconventionalcoreanalyzingtechniques.Throughthetechnicalstudiessuchasultralowtemperaturefrozen,physicalparametersanalyses,fluidscollection,reservoirparametersrecover-Y,etc.,theanalyzingtechnique
5、fortheloosepressurecoreisestablished.Thistechniquecanaccuratelycollectthesaturationparametersofthegasandwater.IntheapplicationofWellTB6一xl。alargeamountofnaturalgasiscol-lected,thegassaturationofthereservoirrocksisobtained,themaximumgassaturationismorethan75%,theseachievementsdisplaytheadvancedna
6、tureofthetechnique;andfurthermoretheanalyzeddatashowthattherearedifferentsaturationsfordifferentlithologies,thesumofthesaturationisupto95%orabove,theseresultstmelyreflectandembodythedistributionlawsofthegasandwaterinthenaturalgasreservoirs,andtheaccuracyandfea-sibilityofthegassaturationanalyzing
7、technique.Throughtheanalysesofthewellcore,thecharacteristicsofthegasandwaterdistributionsforthedifferentlithologiesaremadeclearandfurthermoretheshortageofthewelllog-ginginterpretationinthelow—abundancegas—bearingorpoor—physi