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控压钻井在Auger张力腿平台上连续获得成功编译:黄兵苗娟肖振华()审校:石晓兵()壳牌勘探开发公司在墨西哥湾(GOM)Auger项目的深水张力腿平台(TLP)上使用控压钻井(MPD)连续实施侧钻小井眼二次开发利用动态环空压力控制(DAPC)系统成功实施4口侧钻井,消除了井漏和井眼失稳事故使用MPD能连续提高钻井作业效率,接近先前认为难以达到的油藏目标由于压力衰竭导致破裂梯度减小,先前认为不能钻达的油层间隙,用MPD却能钻进并且无下套管事故最近的MPD钻井设计把静态泥浆密度减少到孔隙压力以下,控制有效钻井安全系数后来的MPD钻井操作中,井底压力给定值变化减少,目标压力窗口之外的额定值消失Auger的油田二次开发需要对钻井设计和MPD设计再次核查在整个4口MPD侧钻井的作业时间里,实施MPD操作的细节聚焦于工程和操作的改进MPDDAPCDOI:103969/j.issn.1002641X2010010101引言AugerTLP(GOM)TLP2860ft(1ft=3048cm)GardenBanks426,199455108bbl(1bbl=0159m3),5000psi(1psi=6895kPa),,,Auger(FG),(ECD),,ECD,,,19992002,Auger,30%723,,,,ECDMPDAugerMPD,ECD,(CBHP)2MPD解决方案MPDAuger,,CBHPMPD,(BHP),AugerMPD,ECD,CBHPMPD,,MPD33:AugerCBHP,(,ROP)(RPM,r/min),DAPCMPD,ECD,MPD,MPDECDMPDBHPMPD,MPD,3MPD钻井设计,,Auger,,,MPDCBHPAuger,05~08lb/gal(1lb/gal=120kg/m3),BHP,,ECD10~14lb/gal,,,,DAPCBHP,,500~600psiBHPMPD,,,ECDROPRPMECD,,BHPBHP,,,,,,,,,ECD,3~6r/min,,Auger(10~12),,ECD04~06lb/gal,500~800psi,BHP,,BHP,,Auger,35,,BHP,,,,34261(20101)ECD,,,BHP(PWD),,MPD,,BHPECD,BHPECDMPD,4MPD系统设计,Auger(BOP)TLP,BOP(RCD)BOP,,RCD,,RCD,DAPC,BHP,Auger,BHP,ECDAugerDAPC3:(IPM)IPM,,BHP,BHPDAPC24in(1in=254mm)12in1,4in,3,(HPU),HPU,,,BHPDAPC,IPM,(),BHPIPM,BHPDAPC(IPM)IPM,DAPCBHP(HMI)IPMDAPCBHP,IPMBHPPWDIPM,DAPCIPM,,,,,IPM,,IPM,IPMDAPCBHPDAPC,35:Auger,,,5工程改进MPDBHP,IPMBHP03lb/gal,02lb/galDAPCBHPIPM,,,IPM,,,DAPC,,4in2in,,,MPD,BHP,DAPCIPMAuger2,DAPC,,4in3in,DAPC,2%~3%,MPDBHP,,,BHPPWDBHP,BHP,MWDAuger,PWD,PWD:BHP02lb/gal,02lb/gal,,,,,PWD,01lb/galBHPMPD,MPD,MPD,,RCD,MPDRCDBHP,,,,BHP,MPD,,,DAPCBHPBOP,BOP,,36261(20101)6执行改进MPD,MPD,AugerMPD,Auger,,,MPD,600ft2in4in,,,BOP,RCDRCD,MPDRCDRCDDAPC,MPDDAPC,,,,MPD,,DAPC,,,DAPCAuger3,,DAPC,IPM,DAPC,,7结论AugerMPDBHP,:;;,ECDAuger,MPD,410000ft140,99%,RCD,BHPA18ST3AugerMPD,,ECD04lb/gal,ECD,MPD,A8ST1AugerMPD,ECD08lb/gal,ECD10lb/gal,,,MPD05lb/gal02lb/gal,MPD,A13ST3Auger,A8ST11,3,06lb/gal,03lb/gal,,,,AugerMPDA13ST4ST3,(54)37:Auger,,,,[(9)],,6结论,,,33,5,,,,,JournalofNonNewtonianFluidMechanics2006139(20081203)(32)(),,PMMA,,a,2aHLPPfxSPE106030(20081106)(37),01lb/gal,04lb/gal,4MPD2DAPCMPD:,MPD100%;RCD,MPD1;MPD50%,6h;,MPD;,MPD40%;MPD100%;;RCD1h,;,05lb/galMPD;,IADC/SPE112662(20081124)54261(20101)