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slag cement slurries
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  相似匹配句对
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A furnace slag cement slurry with density of 1. 48 ~1. 63 g / cm3 composed of slag instead of hydrated materials, slag activators and a few amount of conventional cement, bentonite and. floating beads was innovated in Changqing Oilfield. The slurry has following properties - fluidity > 20 cm, thickening time (at 45℃, 25 MPa ) > 180 min, resistance to pressure (at 45℃) equal to 5. 4 ~10. 8 MPa. It has very good compatibllity with pure cement slurry and meets the requirements...

A furnace slag cement slurry with density of 1. 48 ~1. 63 g / cm3 composed of slag instead of hydrated materials, slag activators and a few amount of conventional cement, bentonite and. floating beads was innovated in Changqing Oilfield. The slurry has following properties - fluidity > 20 cm, thickening time (at 45℃, 25 MPa ) > 180 min, resistance to pressure (at 45℃) equal to 5. 4 ~10. 8 MPa. It has very good compatibllity with pure cement slurry and meets the requirements of rig-site operations. The four well practices demonstrated that the cementing with this low density slag cement slurry against the formations above the pay zones and that with pure cement slurry against the pay zones guaranteed a smoothened cementing engineering with super quality and less cost than low density burned coal residual powder cement slurry. The physical - chemical specifications of the furnace slag and its activators and its working mechanism were also discussed.

长庆油田以高炉矿渣代替水化材料,再加激活剂和少量水泥、膨润土和漂珠,配制成1.48~1.63g/cm3的低密度矿渣水泥浆,经室内试验,流动度大于20cm,45℃、25MPa条件下的稠化时间大于180min,45℃、24h的抗压强度达到5.4~10.8MPa,与高密度的纯水泥浆配伍性好,能满足现场施工要求。经4口井试验,油层以上用低密度矿渣水泥浆封固,油层仍用纯水泥封固,施工顺利,固井质量优良,成本比用低密度粉煤灰水泥浆固井还要低。文中还探讨了高炉矿渣和激活剂的物理性质、化学性质和水化机理。

According to the actual problems existed in two-stage cementing operations in low pressure leaking formations of low permeability gas field,using blast furnace slag(BFS),floating beads and combining advantages of universal (drilling) fluid (UF) cementing technique,slag cement slurry with ultra-low density of 1.20-1.40g/cm 3 is designed. The paper introduces one-trip cementing technique using this (ultra-low density slag cement) slurry as lead slurry and pure G slurry...

According to the actual problems existed in two-stage cementing operations in low pressure leaking formations of low permeability gas field,using blast furnace slag(BFS),floating beads and combining advantages of universal (drilling) fluid (UF) cementing technique,slag cement slurry with ultra-low density of 1.20-1.40g/cm 3 is designed. The paper introduces one-trip cementing technique using this (ultra-low density slag cement) slurry as lead slurry and pure G slurry as tail slurry to substitute for fractional cementing technique. Laboratory research results show that activation agents in the curing fluid for slag drilling fluid with ultra-low density can diffuse into filter cake and residual UF, Thus, casing,cementstone and formation will obtain complete bonding,good formation isolation result and high compressive strength.Slag cement slurry has good rheology,systematic stability and satisfactory thickening time that can meet the requirements of field operations and can solve the cementing quality problems existed in fractional cementing technique.

本文针对陕甘宁盆地中部低渗透天然气田低压易漏地层二级固井中存在的问题,利用高炉矿渣、漂珠的潜在活性及比重较小的特点,结合多功能钻井液固井技术的优点,用多功能钻井液设计超低密度(120g/cm3~140g/cm3)矿渣水泥浆。用该水泥浆为领浆和纯G级水泥浆为尾浆对天然气井进行一次性注水泥固井,替代分级固井技术。室内研究结果表明:超低密度矿渣钻井液固化液中激活剂可以扩散到滤饼和残留的多功能钻井液中,使套管、水泥石和地层三者之间达到完整的胶结,使地层封隔效果良好,水泥石抗压强度高,水泥浆流变性好,体系稳定,稠化时间满足现场施工要求,并解决了分级固井技术中存在的固井质量问题。

The paper discusses how to make up blast furnace slag (BFS) cement slurry system with high density of 1.75~1.92g/cm 3 using BFS as hydration material,adding some slag activation agent,cement and bentonite.The cement slurry system is used to plug up hydrocarbon reservoirs.Compression strength,initial/final setting time and rheological properties of three cement slurry systems with densities of 1.75g/cm 3,1.83g/cm 3 and 1.93g/cm 3 are tested at 45℃,60℃...

The paper discusses how to make up blast furnace slag (BFS) cement slurry system with high density of 1.75~1.92g/cm 3 using BFS as hydration material,adding some slag activation agent,cement and bentonite.The cement slurry system is used to plug up hydrocarbon reservoirs.Compression strength,initial/final setting time and rheological properties of three cement slurry systems with densities of 1.75g/cm 3,1.83g/cm 3 and 1.93g/cm 3 are tested at 45℃,60℃ and 75℃ using API experimental method.Testing results show that compression strength of high density slag cementstone is lower than G cementstone with the same density,but can meet the requirement of perforation.Meanwhile,rheological property and stability of furnace slag cement slurry with high density can meet the need of field operation.And slag cementstone can't be eroded by sulphate.

以高炉水淬矿渣为水化材料,添加少量矿渣激活剂和少量水泥、膨润土,配制成175g/cm3 ~1 .92g/cm 3 密度范围的高密度高炉矿渣水泥浆体系,用以封固油气井油气层部位的井段。用 A P I 标准试验方法,测试175g/cm 3 、183g/cm 3 、193g/cm 3 三种密度体系,在45 ℃、60 ℃、75 ℃条件下矿渣水泥石的抗压强度,初终凝时间和流变性等性能参数。并且和 G 级水泥浆性能进行对比。试验结果表明:高密度矿渣水泥石抗压强度低于同密度的 G 级水泥石,但能满足射孔对水泥石抗压强度的要求。高密度矿渣水泥浆的流变性和稳定性满足现场施工要求。硫酸盐对矿渣水泥石无侵蚀作用。

 
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