CAJ | 학술논문

低压易漏地层在固井过程中易发生漏失，因此固井时要求降低水泥浆密度。以漂珠和空心玻璃微珠复合作为密度减轻材料，根据颗粒级配紧密堆积理论，以水泥、稳定剂DZW以及其他各种外加剂进行合理配比，设计出一种密度为1.28 g/cm3的低密度水泥浆。性能评价结果表明：该体系满足沉降稳定性要求，流动性好，65℃下滤失量小于50 mL，24 h抗压强度大于14 MPa。现场应用结果表明，复合空心微珠低密度水泥浆体系能够有效解决低压易漏地层固井漏失问题。
저압역루지층재고정과정중역발생루실，인차고정시요구강저수니장밀도。이표주화공심파리미주복합작위밀도감경재료，근거과립급배긴밀퇴적이론，이수니、은정제DZW이급기타각충외가제진행합리배비，설계출일충밀도위1.28 g/cm3적저밀도수니장。성능평개결과표명：해체계만족침강은정성요구，류동성호，65℃하려실량소우50 mL，24 h항압강도대우14 MPa。현장응용결과표명，복합공심미주저밀도수니장체계능구유효해결저압역루지층고정루실문제。
Lost circulation may easily occur in low pressure leaking-prone formation during cementing, so cement slurry density needs to be reduced while cementing. Using lfoating beads and hollow glass microbeads jointly as density lightening material and properly matching cement, stabilizer DZW and various other additives according to theory of close packing of grain composition, a low density cement slurry was designed – with a density of 1.28 g/cm3. The result of performance evaluation shows that this system can meet therequirementofsettlingstability,hasgoodlfowabilityanditsifltrationat65℃ is less than 50 mL and its 24 h compression strength is greater than 14 MPa. Results of ifeld application show that this composite hollow micro-bead low density cement slurry system can effectively address the problem of lost circulation in low pressure leaking-prone formation during cementing.