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1、本科畢業(yè)設計(論文)水力噴射分段壓裂工藝研究摘要:水力噴射壓裂是集水力噴射射孔、水力壓裂、隔離一體化的新型增產(chǎn)改造技術,無需機械封隔,可實現(xiàn)準確的定點噴射,一套工具多段壓裂,適用于裸眼,篩管完井的水平井或直井以及低滲透儲層和薄互層壓裂。以水力噴射分段壓裂的裂縫起裂與擴展機理為基礎,通過射孔參數(shù)對裂縫起裂的影響實驗,得到射孔參數(shù)(射孔深度、射孔直徑、孔眼與最大水平應力夾角)和起裂壓力、起裂時間的關系;通過實驗文獻調(diào)研,對水力參數(shù)、磨料參數(shù)、巖性參數(shù)等不同射孔參數(shù)對射孔的影響情況進行研究,得到射孔參數(shù)對射孔效果的影響規(guī)律,進而對水力噴射
2、壓裂射孔參數(shù)進行優(yōu)選;在理論和實驗基礎上,設計了噴嘴內(nèi)部結構,確定了噴嘴的幾何參數(shù);對噴嘴材料的耐沖蝕性進行了實驗分析與選擇,優(yōu)選噴嘴材料;依據(jù)水力噴射壓裂射孔和壓裂的工藝要求,設計出井下工具的外形及內(nèi)部結構。水力噴射壓裂適用于薄層的分段壓裂,因此準確確定噴射點是水力噴射壓裂的關鍵。由于壓裂過程中存在油管伸長量,本文從油管受力分析的角度研究油管伸長量的計算方法,推導出油管伸長量的理論計算公式,彌補了目前校深等手段無法確定油管伸長量的缺陷。通過分析總結前期水力噴射分段壓裂的應用情況,對該工藝的適應性與局限性有了深入的認識,本文開展的水
3、力噴射分段壓裂技術的系統(tǒng)研究,為水力噴射壓裂設計提供了理論依據(jù)。關鍵詞:水力噴射;分段壓裂;研究與應用;優(yōu)化設計;油管伸長量本科畢業(yè)設計(論文)StudyandApplicationonHydraulicJetSectionalFracturingAbstract:Hydraulicjetfracturing,whichintegratesperforation,fracturingandisolation,isanewstimulationtechnology,withoutmechanicalpacker,achievingac
4、curatelyfixed-pointjetting,asetoftoolsformulti-stagefracturing,applicabletothenakedhole,thescreencompletionofhorizontalorverticalwells,thelowpermeabilityreservoirsandthethininterbededfracturing。Basedontheprinciplesoffractureinitiationandpropagationcharacteristicsofhydr
5、aulicjetseparatelayerfracturing,throughtheeffectiveexperimentofperforatingparametersonfractureinitiation,obtainingtherelationshipwiththeperforatingparameters(perforatingdepth,perforatingdiameter,theanglebetweenholesandthemaximumlevelofstress),splitpressureandsplittime;
6、throughexperiments,carryingonresearchingforthedifferentperforatingparameterssuchashydraulicparameters,abrasiveparameters,theparametersofrockspropertiesontheeffectivecaseoftheperforation,andobtainingimpactsofthelawofperforatingparametersonperforatingeffect,thenconductin
7、gontheoptimizationofhydraulicjetperforationfracturingparameters.Basedontheoriesandexperiments,thenozzleinternalstructurehasbeendesigned,thenozzlegeometricparametershasbeendetermined;thenozzlematerialshavebeenoptimizedthroughexperimentalanalysisandselectionoftheerosionr
8、esistanceofnozzlesmaterials;andtheshapeandinternalstructureofthedownholetoolshasbeendesignedaccordingtohydraulicjetpe