泥質(zhì)巖蓋層對各種相態(tài)天然氣封閉機(jī)理及其定量研究.pdf

1、分類號：TE345UDC：單位代號：10200學(xué)號：B0401009大慶石油學(xué)院博士研究生學(xué)位論文論文題目：遏廈量董屋懟魚贊擁查忝簽氬封閉熱堡爨基窟星研塞～博士生：付廣指導(dǎo)教師：呂延防教授申請學(xué)位級別：工學(xué)博士學(xué)科、專業(yè)：油氣田地質(zhì)工程提交論文時間：2006年12月1日答辯日期：2006年12月25日授予學(xué)位日期：2006年12月SeaImechanismsofmudstOnecaprOckStOgaSineaChphaSeandthe

2、irqUantitatiVereSearChABSTRACTBasedonthe咖dyofmigrationmech卸ismsofgasindi仃erentphases，thesealmech鋤ismsofmudstonec印rockst0gasiII∞chphasewercoverally柚dsyStemlystIIdiedCapillarysealw嬲considcredt0be恤emainsealmech柚ismofmudston

3、ecaprockstogasinfkephaseAbnomalporcfluidpressurec姐p】ay鋤iIldirectroleiIIsealinggasjnfkepha∞，Absorptionw邪consideredtobetllemainsealmechanismsofmudstonecaprockstogasinwatersolublephascAbno肌alporefluidpressurec鋤alsoplay卸impo

4、rt鋤troleiIlseaJingg船inwdtcrsolublephaseRestraining粕dreplacillgconcen仃ationsealw雛consjderedtobethemajn∞almechanismsofmudstonecaprockstogasmdi餉sionpha∞Bydisplacel|l饑tprcssure，abnorIIlalpomflowpressure，absorptionforce，abnor

5、nlaJgas—bearillgconccn仃ation卸dgcn嘲tiongasintens咄Thesealabil時ofmudstonecaprocktogasi11eachphasewasoVerly柏dsysteIn】ysmdiedDisplacementpressurew豁basicpar枷eterevaluatingthec印ilIarysealabilityofmu出tonecapmcl【s，“c卸begottenbyex

6、periment，andbego咖bythedataofinterval嘞sit—timeaIldseismicVelocjtyjn111eb懿icofexperimentAbnomalporenuidpressureis卸importantf如torinnuencingsealabilityofmudstonecaprockt0gasin行∞phasencallbegottenbythedataofinterval訂ansittime

7、orb，，thedataofsei鋤icveIoci螄Abno咖algasbearingconc印trationwasconsid刪tobet11emainpar鋤eter“alu砒ingttleremainingconcen仃ationsealabilityofmudstonecaprocl(s，itcanbegottenbytIeconditionsoftempe咖reandpressureG嬲一expulsionintcnsity

8、c柚rcflectt11ehydmc盯bongen啪tioncharacteristicsofmudstonec印rocks，“啪beuscd舾apar砌eter“aluatingthereplacingconcen仃ationsealabilit)，0fmudgtonecaprock，“c卸bcgottenbytheresearchmsultsofgeneratjonhydroc盯bonofgassourcerocl(sCompact

9、iondiagenesisstagesc柚rel日ectthesealabilityofmudsconecaprocktog觴in、vatcrsolublepha∞，itc柚be90ttenbythe∞searchresultsofdiagenesisofmudstoneFromst兀lctureandstmctIlmleVoIution，sedimentary鋤Vimnm即t柚dcompactiondiagenesisThefaVor

10、ablefo珊ationc伽djtionsofmudstonecaprockwasdiscussedThesagsofb鵲inwereconsidercdtobethemostf如orableare船offonllation柚ddeVelopmentofmudstonecaprocksThemaximumwaterinvasionperiodofrelatiVeJysubmergedwitlla筍eatscaleinabasinw站co

11、nsideredtobethemostfaVorablepcriodoffomlatjonanddevelopmentofmudstonec印rocksShanow—seafacies，semide印lacustrineanddeeplacus打inefacies卸dbroadtidalflatandlagoonfhcieswereconsideredtobethemostfavomblescdimentaryenVironmentso

12、ffomation柚ddevelopmentofmudstonecaprocl(sAswbageoflatediagcnesiswasconsidercdt0bethesn0ngeststageofsealabiljtyofmudstonecaprocksBasedontllestudyofsealmechanismofmudstonecaprocktog觴ineachphaseandfonnationconditions，theevo

13、lution跏devoluti徹stageofsealabjlityofsealabjli砷ofmudstonecaprockwasstIldiedC印iIlary∞alisgene『allythesealmechanismt0gasinfeepha∞，Assoon∞mudst伽ecaprocksdepositcd，t11eir∞alstogaswerefomledWithtlleincre船eofdepth，t11ecapillary

14、sealabilityofmudstonecap眥ksjncreasesAbnomalporefluidpressurec卸onlycx砬jnuncompactcdmudstonec叩rocks，鋤dinspecialstageoftheirdiagenesisevoIutionRestrainingconcen們tion辯alandrel)lacjngconc朗tration∞alc卸onlyexistintllemudstoneca