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1、Aug．，20122012年8月大慶石油地質(zhì)與開發(fā)Vol_31No．4第3l卷第4期PetroleumGeologyandOilfieldDevelopmentinDaqingDOI：10．3969／J．ISSN．1000-3754．2012．04．022含泥砂巖儲(chǔ)層水力壓裂裂縫起裂及延伸規(guī)律王賢君李存榮韓露(大慶油田有限責(zé)任公司采油工程研究院，黑龍江大慶163453)摘要：含泥砂巖儲(chǔ)層是海拉爾油田主力油層之一，由于含泥砂巖具有一定的彈塑性，其裂縫起裂及延伸有別于砂巖儲(chǔ)層，所以壓裂成功率僅為70％左右。為進(jìn)一步提高壓裂成功率，對(duì)不同泥質(zhì)質(zhì)量分?jǐn)?shù)條件下巖石的應(yīng)變關(guān)系
2、進(jìn)行了研究，根據(jù)不同泥質(zhì)質(zhì)量分?jǐn)?shù)條件下裂縫起裂及擴(kuò)展準(zhǔn)則，利用有限元分析軟件建立含泥地層裂縫起裂及延伸的力學(xué)模型，通過(guò)模擬分析不同泥質(zhì)質(zhì)量分?jǐn)?shù)條件下地層的破裂壓力和裂縫延伸的特點(diǎn)，認(rèn)清了含泥及砂泥互層情況下裂縫起裂及延伸規(guī)律。模擬結(jié)果表明，高含泥砂巖儲(chǔ)層往往需要提供更高的起裂壓力和延伸壓力，為該類儲(chǔ)層水力壓裂的優(yōu)化設(shè)計(jì)提供了依據(jù)。關(guān)鍵詞：含泥砂巖儲(chǔ)層；泥質(zhì)；裂縫起裂；延伸規(guī)律；有限元中圖分類號(hào)：TE357．11文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1000-3754(2012)04-0107-03HYDRAULICFRACTUIUNGINITIATIoNANDPRoPAGATI
3、oNLAWSFoRMUD．BEARINGSANDRESERVoIRSWANGXianjun，LICunrong，HANLu(ResearchInstituteofOilProductionEngineeringofDaqingOitfiadCompanyLtd．，Daqing163453，China)Abstract：Mud-bearingsandstonereservoirsareoneofthemainoi1layersinHailarOilfield，justbecauseofthee—lastic—plasticcharacteristicsofthisk
4、indofreservoirs，theirfractureinitiationandpropagationaredifferentfromsandstoneones，thesuccessratiooftheirhydraulicfracturingisonlyabout70％．Inordertoenhancethesuccessratiooffracturing。thestrainrelationoftheshalyrocksiSstudiedundertheconditionsofdiferentmassfractions．Accordingtotherules
5、ofthefractureinitiationandpropagationundertheaboveconditions，andfurthermorewiththehelpofthefiniteelementanalyzingsoftware，themechanicalmodelisestablishedforthefractureinitiationandpropagationofmud-beatingformation．Throughsimulatingandanalyzingthecharacteristicsofthebreakdownpres—surea
6、ndfracturepropagationofthemud-bearingformationundertheconditionsofdifferentmassfractionsthelaws，ofhydraulicfracturinginitiationandpropagationarewellrecognizedformud．bearingandsand．shaleinterbeds．Thesimulationresultsshowthatforhighmud—bearingsandstonereservoirsitisoftenrequiredtoprovid
7、ehigherhydraulicfracturinginitiationandextensionpressures，thustheachievementsabovehavepresentedtheevidenceforthehy-draulicfracturingoptimizationofthiskindofreservoirs．Keywords：mud—bearingsandstonereservoir；shaly；fractureinitiation；propagationlaw；finiteelement收稿日期：2011-08．12改回日期：2012-0
8、1．12基
