偏压固结状态下含天然气水合物泥质粉砂沉积物电阻率特性研究

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中图分类号：TE122 文献标志码：A 文章编号：2095-1329（2025）03-0087-11

Abstract：Avastreserveofnaturalgashydrates isburied withinthesity-clayeyreservoirsoftheSouth China Sea（SCS）andthe explorationandmoitoingoftheirsafeextractionaefacilitatedbysistivitylggingtehologyInthissdythanisotoictr characteristicsofydratebaringesevirsareinvestigatedbyartifciallofguingsiltyaeysdimentsbasedontepariclze distributincurvesofhydratecoresfromtheSS.Using ahydrate triaxialapparatus integrated witharesistivity measurementsystem， hydrate-bearingsediments wereprepared underdeviatoricconsolidationconditions.Experiments weresubsequentlyconductedto investigatethisiiysoeotsingteosofgratetioolaidr varyinghydrateturatosectiofgpreuedosoatiotrssatio.efollongyfdgseeealdbythe results：1）Theprimaryconductivepathwaysinsilty-layeysedimentsarefomedbyporewaterdisoledionsadherngtoquartzsand andmontmoriloitesufaces.Theelectricalconductivityftesdimentssducedycolig.2）Sdimentesistiityissigicatly affectedbyhydratefomation.Intissudyerdratefomation，arceaseintheesistivityofsiltylayeysdtsis observed， reaching approximately 1000Ω⋅m.3 ）Sediment resistivity is significantly reduced by the application of external streses （e.g.， confiningoraialpresses），witegeofduccrasingasectits.4）Afurtrdeaseidtsiity isobservedaftervatoricsdatioaloughthductioisssprooedtantatcoeduringsotropicooltiI thisstudy，higherresistivityisgenerallyexhibitedbysedimentswith ～25% hydrate saturation under deviatoric consolidation compared to those with ～15% saturation under isotropicconsolidation.Theconclusionsofthis studyare intended to provide theoretical support for the commercial exploration and extraction monitoring of natural gas hydrates in the SCS.

Keywords：naturalgashdrate;ilty-claeysediment;resistivity;dviatoricconsoidatio;hdratesatuation;eectivecofinig pressure; consolidation stress ratio

天然气水合物是由甲烷分子和水分子在低温高压条件下形成的笼状化合物[-]。（剩余19142字）