钻井液用高吸水性树脂的防漏堵漏性能研究

打开文本图片集

ResearchonHighWaterAbsorbentResinforLeakPrevention and Sealing in Water-based Drilling Fluid

LUO Pingya1，²，DAI Feng1，3*，LIU Yingmin³，HE Jianing1， BAI Yang1，2，4

1.Petroleum Engineering School，Southwest Petroleum University，Chengdu，Sichuan 6lo5oo，China 2.StateKeyLbatoryldsseilodExploiatioutsttroUsiedua 3.GeologicalEngineeringDeparmentofichuan ChangingNaturalGasDevelopmentCo.Ltd.hengdu，ichan6oina 4.NationalEngieeringResearchCenterofOil&GasDrillngandCompletionTecnologyChngping，Beijing2Cina

Abstract：Toaddresstheproblemofwellboreleakagecausedbyclayparticlesandnaturalfracturesinshaleoilandgasreservoirs using water-based driling fluids，whichcannot be sucessfullyplugged，aerylicacidand polvinylalcoholareusedas monomers，N， N-' methylene bisacrylamide is used as a chemical crossinking agent，and the response surface method is adopted with waterabsorptionrate as theresponse target.Theexperimental factors are optimized，anda PAA/PVA interpenetrating network structure high water absorbent resin plugging agentis prepared through free radical solution polymerization. Th succesfulsynthesisand thermal stabilityofthe pluggngagent were verifiedby infrared，termogravimetric，andang electron microscopy analysis.Evaluate the pressre sealing performance of the pluggng agent through sealing and pressure bearingcapacity experiments，sand bed experiments，and micro crack simulation experiments.The test results show that the plugging agent has good thermal stability. Under the conditions of a fracture width of 2mm ，a temperature of 180∘C ，a plugging agent dosage of 3% ，and a confining pressure of 10MPa ， the maximum pressure bearing capacity is 6.08MPa ，and the high-temperature and high-pressure filtration loss is 9mL . It can achieve the plugging effect of water-based drilling fluid in shale formations.

Keywords： shale; plugging; high water absorbent resin; response surface methodology; water absorption rate 网络出版地址：http：//link.cnki.net/urlid/51.1718.TE.20250620.0926.002

引言

随着常规油气藏资源的枯竭，非常规油气藏的开采成为重中之重，而页岩油气是非常规油气藏重要的组成部分[1-2]。（剩余17096字）