简介:针对目前元固相完井液存在的问题,以羟乙基纤维素增粘剂、磺化沥青降失水剂、磺化烤胶降粘剂、氯化钠、氯化钾、碳酸钙、氯化钙、溴化钠及甲醛杀菌剂等为主要原料,研制了一种新型低伤害无固相完井液及其高密度配方体系。该体系pH值为8—9,表观粘度为36—52mPa·s,API失水量可控制在10mL以下,120℃热滚10h后的性能基本无变化,90℃热滚16h后的红泥岩回收率达96.8%,常温下放置14天后不沉降、不发霉。研究结果表明,该无固相完井液体系对油气层伤害低,配方中碳酸钙可酸化溶解,可泵性好,对红泥岩等的水化膨胀具有较好的抑制作用,并且具有较好的抗温性、沉降稳定性和防腐性。
简介:研究了Pd/Nb2O5—Al2O3催化剂的制备方法及用于丙酮加氢合成MIBK的催化性能。实验结果表明,在反应温度160℃,反应压力4MPa条件下,丙酮单程转化率为40%,MIBK选择性为92%。
简介:Throughimprovingtheagingprocessduringsynthesisofthesupport,γ-Al2O3withlargeporevolumeandhighsurfaceareawassynthesizedbyafacilesecondaryreformingmethod.Thesynthesisparameters,suchasthereactiontemperature,thefirstagingtemperatureandthesecondagingtemperature,wereinvestigated.Thetexturalpropertiesofγ-Al2O3werecharacterizedbymeansofN2adsorption-desorptionisotherms,X-raypowderdiffractometry(XRD),scanningelectronmicroscopy(SEM),Fouriertransforminfrared(FTIR)spectroscopyandthermogravimetry(TG).TheexperimentalresultsindicatedthatAACHandamorphousAlOOHweretheprecursorsofalumina,whichwereformedviaprecipitationfromsolutionsafterreactionofaluminumsulphatewithammoniumhydrogencarbonate.Theprecursornanocrystallitesgrewandre-assembledduringthesecondaryreformingprocess,whichresultedinanincreasedporesizeandporevolumeandadecreasedbulkdensity.Theas-synthesizedγ-Al2O3materialsfeaturedmeso/macroporosity,largeporevolume(2.175cm3/g),highsurfacearea(237.8m2/g),andlowbulkdensity(0.284g/mL).
简介:Inthisstudy,titaniumdioxidesupportedbymulti-walledcarbonnanotubes(MWCNTs/TiO2)andCr-dopedTiO2supportedbyMWCNTs(MWNTs/Cr-TiO2)weresynthesizedbythesol-gelmethod.Thepreparedsampleswerecharacterizedbytransmissionelectronmicroscopy,X-rayphotoelectronspectroscopy,X-raydiffraction,theBrunauerEmmett-Telleranalysis,andtheRamanspectroscopy.TheoxidationandefficiencyforremovalofSO2inasimulatedfluegaswereinvestigatedexperimentallyinafixed-bedreactor.The15%MWCNTs/Cr-Ti02sampledisplayedexcellentadsorptionproperties,andaSO2removalrateequatingto30.4151mg/gfromthesimulatedfluegascontaining2300μg/gofSO2,8%of02,and5%ofH20wasachievedunderoptimalconditionscoveringatemperatureof333.15K,andaspacevelocityof1275h^-1.TheadsorptionprocesswasenhancedbecauseCrdopingmodifiedtheporestructureandinhibitedthegraingrowthofTiO2.Inaddition,theFreundlichandLangmuirmodelsrevealedthatSO2wasmainlyadsorbedthroughchemicaladsorptiononthesamplesurfaces,andthethermodynamicmodelanalysisindicatedthattheadsorptionwasaspontaneous,exothermic,andentropy-reducingprocess.TheadsorptionkineticsofSO2canbedescribedbythepseudosecond-orderkineticandtheBanghamdynamicsmodels.Thepossiblereactionmechanisminvolvedindesulfurizationprocesswasalsoproposed.
简介:针对港西开发区西5X-3断块规模小,断层多且较为发育,井距较大,注采井网欠完善,层间非均质性较强,开发效果欠佳的状况,通过储集层沉积微相研究、低电阻率油层评价、合理井距研究及油藏剩余油分布类型评价,量化了剩余油分布的潜力,在此基础上采取优化开发层系,合理调整井网、井距等技术对策,改善了开发效果.该断块油藏的开发实践表明,结合沉积微相开展储集层研究是进行剩余油挖潜的有效途径,根据剩余油分布特点,重建注采井网结构,能保持断块油藏平稳高效开发.同时,低电阻率油层潜力较大,是油藏开发后期挖潜的主要对象,而高含水期的厚油层,特别是点坝砂层的中上部仍有一定的开采潜力.