CN104212422A - Heavy oil low cost modified clay-type water shutoff agent and usage method thereof - Google Patents

Heavy oil low cost modified clay-type water shutoff agent and usage method thereof Download PDF

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CN104212422A
CN104212422A CN 201410388187 CN201410388187A CN104212422A CN 104212422 A CN104212422 A CN 104212422A CN 201410388187 CN201410388187 CN 201410388187 CN 201410388187 A CN201410388187 A CN 201410388187A CN 104212422 A CN104212422 A CN 104212422A
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agent
sodium
slug
water
heavy
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CN104212422B (en
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左青山
赵洪涛
裴春
薛炳平
刘中玉
王嘉敏
张安
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左青山
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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/50Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
    • C09K8/504Compositions based on water or polar solvents
    • C09K8/506Compositions based on water or polar solvents containing organic compounds
    • C09K8/508Compositions based on water or polar solvents containing organic compounds macromolecular compounds
    • C09K8/5083Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds

Abstract

The invention relates to a heavy oil low cost modified clay-type water shutoff agent and a usage method thereof. The agent is prepared from the following components by weight: a main agent comprising 10-15% of sodium bentonite, 0.1-0.2% of polyacrylamide and 5-10% of ultrafine oil well cement; and an external additive comprising 0.3%-0.45% of an agent A, 2% of an agent B, 2% of an agent C, and the balance of water. The agent A comprises 30% of sodium carbonate, 20% of sodium alkyl sulfonate and 50% of sulfonated phenolic resin; the agent B comprises 80% of sodium silicate, 10% of triethanolamine and 10% of ammonium persulfate; and the agent C comprises 60% of sodium aluminate, 25% of sodium sulfate, 10% silicon oxide and 5% of calcium oxide. The water shutoff agent provided by the invention employs a three-segment plug-type injection method comprising an early strength segment slug, a colloidal segment slug and a strengthening segment slug, which are injected sequentially. The water shutoff agent has the characteristics of realization of low cost, high dose, multi-segment slug and low density oil reservoir deep plugging, and good injection performance and sealing performance.

Description

一种稠油低成本改性粘土类堵水剂及使用方法 One kind of low-cost heavy-modified clays plugging agent and the method used

技术领域 FIELD

[0001] 本发明涉及一种稠油油田封堵水侵大孔道的堵水材料及方法,特别涉及一种稠油低成本改性粘土类堵水剂及使用方法。 [0001] The present invention relates to a method of plugging material and a heavy oil is large pore blocking intrusion of water, particularly to a low-cost heavy-modified clays plugging agent use.

背景技术 Background technique

[0002] 受边底水控制的稠油油藏,在蒸汽吞吐开发的中后期易发生水侵现象,一旦稠油油藏见水后正常开发将难以维系。 [0002] heavy oil reservoir by the bottom edge of the water control, water invasion phenomenon occurs easily steam stimulation in the late development, normal development will be difficult to maintain once the heavy oil reservoir see the water. 稠油水侵通道往往与热采过程中蒸汽波及范围有关,往往在采出程度高的部位更易水窜,同时也与稠油粘度有关,稠油粘度越高形成的水侵通道就越窄。 Often with heavy water intrusion passage of steam thermal recovery process relating spread range, more often a high water recovery degree channeling a portion, but also with the viscosity of heavy oil, the higher the viscosity of heavy water passage formed in the narrower invasion. 目前现有的稠油无机颗粒型堵剂注入浆体密度较高、封堵强度高,但其运移距离较近,易发生近井地带堵塞;而有机化学材料堵剂如冻胶、凝胶类堵剂,注入性好,但地下封堵适应性差、封堵强度低有效时间短,更重要的是耐温的机化学材价格高,无法满足大剂量注入要求。 Heavy inorganic particles currently available type blocking agent into the high slurry density, high sealing strength, but short distance transport, prone to clogging near wellbore; and Organic Chemicals blocking agent such as jelly, gel based blocking agent, good injection property, but poor adaptability underground plugging, sealing strength of the low effective short time, high temperature is more important chemical machine product prices, can not meet the requirements of high dose implantation.

[0003] 常规无机堵剂如粘土、木钙、粉煤灰、水泥等颗粒型堵剂具有封堵强度高、适应性强等特点,比较适合稠油油藏中后期大孔道封堵的需要,但常规无机堵剂容易发生近井地带堵塞,无法满足大剂量注入及深度堵水要求。 [0003] Conventional inorganic blocking agents such as clays, calcium wood, fly ash, cement and other particle-based blocking agent having a high sealing strength, adaptability and other characteristics, is suitable for heavy oil reservoirs need large pore plugging late, However, conventional inorganic blocking agent near wellbore prone to clogging, and can not meet the high dose implantation depth plugging requirements. 有机堵剂堵剂虽然注入性好,但其封堵适应性差、封堵能力和强度较弱,更重要的有机堵剂耐温性能较差,而耐温的有机化学材价格过高,无法满足稠油油藏堵水的要求。 Although organic blocking agent blocking agent injected is good, but the poor adaptability plugging, plugging ability and strength is weak, the poor more important organic blocking agent temperature resistance, temperature and organic chemical products price is too high, can not meet heavy oil reservoir plugging requirements.

发明内容 SUMMARY

[0004] 本发明的目的就是针对现有技术存在的上述缺陷,提供一种采用无机材料生产, 成本低廉、低密度、可实现大剂量深部堵水,封堵强度较高的稠油低成本改性粘土类堵水剂及使用方法。 [0004] The present invention is aimed at the above drawbacks of the prior art, to provide an inorganic material production, low cost, low density, can achieve a high dose deep plugging portion, plugging high strength heavy cost change of the plugging agents to use clays.

[0005] -种稠油低成本改性粘土类堵水剂,由以下重量份的组分制成: 主剂为钠基膨润土10 -15%、聚丙烯酰胺0. 1-0. 2%、超细油井水泥5 -10%,外添加剂为A剂0. 3%-0. 45%、B剂2%、C剂2%,其余为清水配制; 其中,所述的A剂为碳酸钠30%、烷基磺酸钠20%、磺化酚醛树脂50% ;B剂为硅酸钠80%、 三乙醇胺10%、过硫酸铵10% ;C剂为铝酸钠60%,硫酸钠25 %,氧化硅10 %,氧化钙5% ; 在常温条件下,将钠基膨润土加入到水中搅拌20分钟后,再将外添加剂慢慢加入到水中搅拌,最后加入聚丙烯酰胺和超细油井水泥,充分搅拌即可配成稠油无机深部堵水剂,堵水剂的浆体密度:1.20-1. 35g/cm3。 [0005] - low cost species heavy-modified clays blocking agent, prepared from the following components by weight parts: the main agent is sodium bentonite 10-15%, 0. 1-02% polyacrylamide. ultrafine oil well cement 5-10%, of the external additive a agent 0. 3% -0 45%, 2% B agent, 2% C agent, the remainder being water formulation;. wherein said agent is sodium carbonate a 30 %, a 20% sodium alkyl sulfonates, sulfonated phenol-formaldehyde resin 50%; B agent is sodium silicate 80%, 10% triethanolamine, 10% ammonium persulfate; agent is sodium C 60% aluminum, 25% sodium , 10% silica, 5% calcium oxide; under normal temperature conditions, the sodium bentonite in water was added to the stirred for 20 minutes, and then external additives added to the water slowly with stirring, and finally adding polyacrylamide ultrafine oil well cement, heavy inorganic formulated to stir deep blocking agent, the blocking agent slurry density:. 1.20-1 35g / cm3.

[0006] 上述的聚丙烯酰胺的分子量为600〜900万,水解度为15〜30%,阴离子型。 [0006] The molecular weight of the polyacrylamide is 600~900 million and a degree of hydrolysis of 15~30%, anionic.

[0007] 上述的超细油井水泥为450目G级油井超细水泥,粒径中值D50彡IOum。 [0007] The ultra fine cement oil wells 450 mesh fine cement class G, San IOum D50 median particle size.

[0008] 本发明提到的一种稠油低成本改性粘土类堵水剂的使用方法,堵水剂的注入顺序依次是早强段塞、胶体段塞、强化段塞,以下各组分按重量百分比计算, 其中,(1)早强段塞:钠基膨润土10%、超细油井水泥5%、A剂0. 3%、B剂2%、C剂2%, 其余为清水配制; (2) 胶体段塞:钠基膨润土10%、聚丙烯酰胺0. 1%、A剂0. 3%、B剂2%、C剂2%,其余为清水配制; (3) 强化段塞:钠基膨润土15%、超细油井水泥10%、A剂0. 45%、B剂2%、C剂2%,其余为清水配制; 所述的A剂为碳酸钠30%、烷基磺酸钠20%、磺化酚醛树脂50% ;B剂为硅酸钠80%、三乙醇胺10%、过硫酸铵10% ;C剂为铝酸钠60%,硫酸钠25%,氧化硅10%,氧化钙5%。 [0008] A heavy oil of the present invention mentioned modified clays using low cost method of blocking agent, the blocking agent is injected into the order of early strength slug, slug colloid, strengthening slug, the following components percentage by weight, wherein (1) early strength slug: 10% of sodium bentonite, ultrafine oil well cement 5%, A agent 0. 3%, 2% B agent, 2% C agent, the remainder being water preparation; (2) slug colloid: 10% of sodium bentonite, polyacrylamide 0. 1%, A agent 0. 3%, 2% B agent, 2% C agent, the remainder being water formulation; (3) strengthen the slug: 15% sodium bentonite, ultrafine oil well cement 10% of the a agent 0. 45%, 2% B agent, 2% C agent, the remainder being water prepared; said agent a 30% sodium carbonate, alkyl sulfonate 20% sodium sulfonated phenolic resin 50%; B agent is sodium silicate 80%, 10% triethanolamine, 10% ammonium persulfate; C agent is sodium aluminum 60%, sodium sulphate 25%, 10% silica, 5% calcium oxide.

[0009] 本发明的有益效果是:采用前置早强段塞,先占据通道并具有一定强度,为后续堵剂驻留提供保护。 [0009] Advantageous effects of the invention are: the use of the pre-early strength slug, to occupy the channel and having a certain strength, providing protection for subsequent plugging agent resides. 强化段塞封堵强度更高,提高堵剂的封口效果; 其微观特点是:一是在钠基膨润土+水泥固化浆液中,通过离子交换、团粒化作用和凝硬反应形成以水化物为骨架的结石体;二是以膨润土+聚丙烯酰胺(HPAM)浆液中利用树脂和硅酸盐等添加剂形成网状结构的紊凝体,利用两种不同堵剂体系的组合形成对油藏大孔道的有效封堵。 Strengthening slug plugging higher strength, improve the sealing effect of blocking agent; microstructure features: First, the cement solidification + Na-bentonite slurry by ion exchange, and the role of pozzolanic aggregates formed in the reaction as the backbone hydrate stones body; Second + bentonite polyacrylamide (of HPAM) slurry of resin and additives such as a silicate condensate formed body tangled net-like structure, using a combination of two different plugging agent forming large pore reservoir effective closure.

具体实施方式 Detailed ways

[0010] 本发明提到的一种稠油低成本改性粘土类堵水剂,由以下重量份的组分制成: 主剂为钠基膨润土10 -15%、聚丙烯酰胺0. 1-0. 2%、超细油井水泥5 -10%,外添加剂为A剂0. 3%-0. 45%、B剂2%、C剂2%,其余为清水配制; 其中,所述的A剂为碳酸钠30%、烷基磺酸钠20%、磺化酚醛树脂50% ;B剂为硅酸钠80%、 三乙醇胺10%、过硫酸铵10% ;C剂为铝酸钠60%,硫酸钠25%,氧化硅10%,氧化钙5% ; 在常温条件下,将钠基膨润土加入到水中搅拌20分钟后,再将外添加剂慢慢加入到水中搅拌,最后加入聚丙烯酰胺和超细油井水泥,充分搅拌即可配成稠油无机深部堵水剂,堵水剂的浆体密度:1.20-1. 35g/cm3。 [0010] A low-cost heavy-modified clays mentioned blocking agent of the present invention, parts made of the following components by weight: a main agent is sodium bentonite 10-15%, 0. 1- polyacrylamide 0.2%, oil well cement ultrafine 5-10%, of the external additive a agent 0. 3% -0 45%, 2% B agent, 2% C agent, the remainder being water formulation;. wherein said a agent is sodium carbonate 30%, 20% sodium alkyl sulfonate, sulfonated phenol-formaldehyde resin 50%; B agent is sodium silicate 80%, 10% triethanolamine, 10% ammonium persulfate; agent is sodium C 60% aluminum , sodium sulphate 25%, 10% silica, 5% calcium oxide; under normal temperature conditions, the sodium bentonite in water was added to the stirred for 20 minutes, and then external additives added to the water slowly with stirring, and finally adding polyacrylamide ultrafine oil well cement, inorganic heavy formulated to stir deep blocking agent, the blocking agent slurry density:. 1.20-1 35g / cm3.

[0011] 上述的聚丙烯酰胺的分子量为600〜900万,水解度为15〜30%,阴离子型。 [0011] The molecular weight of the polyacrylamide is 600~900 million and a degree of hydrolysis of 15~30%, anionic.

[0012] 上述的超细油井水泥为450目G级油井超细水泥,粒径中值D50彡IOum。 [0012] The ultra fine cement oil wells 450 mesh fine cement class G, San IOum D50 median particle size.

[0013] 钠基膨润土是根据蒙脱石层间可交换阳离子种类、含量来划分:碱性系数大于或等于1的为纳基膨润土。 [0013] Sodium bentonite is a montmorillonite exchangeable cationic species, divided content: greater than or equal to the coefficient of basic Naji bentonite 1.

[0014] 本发明提到的一种稠油低成本改性粘土类堵水剂的使用方法,堵水剂的注入顺序依次是早强段塞、胶体段塞、强化段塞,以下各组分按重量百分比计算, 其中,(1)早强段塞:钠基膨润土10%、超细油井水泥5%、A剂0. 3%、B剂2%、C剂2%, 其余为清水配制; (2) 胶体段塞:钠基膨润土10%、聚丙烯酰胺0. 1%、A剂0. 3%、B剂2%、C剂2%,其余为清水配制; (3) 强化段塞:钠基膨润土15%、超细油井水泥10%、A剂0. 45%、B剂2%、C剂2%,其余为清水配制; 所述的A剂为碳酸钠30%、烷基磺酸钠20%、磺化酚醛树脂50% ;B剂为硅酸钠80%、三乙醇胺10%、过硫酸铵10% ;C剂为铝酸钠60%,硫酸钠25%,氧化硅10%,氧化钙5%。 [0014] A heavy oil of the present invention mentioned modified clays using low cost method of blocking agent, the blocking agent is injected into the order of early strength slug, slug colloid, strengthening slug, the following components percentage by weight, wherein (1) early strength slug: 10% of sodium bentonite, ultrafine oil well cement 5%, A agent 0. 3%, 2% B agent, 2% C agent, the remainder being water preparation; (2) slug colloid: 10% of sodium bentonite, polyacrylamide 0. 1%, A agent 0. 3%, 2% B agent, 2% C agent, the remainder being water formulation; (3) strengthen the slug: 15% sodium bentonite, ultrafine oil well cement 10% of the a agent 0. 45%, 2% B agent, 2% C agent, the remainder being water prepared; said agent a 30% sodium carbonate, alkyl sulfonate 20% sodium sulfonated phenolic resin 50%; B agent is sodium silicate 80%, 10% triethanolamine, 10% ammonium persulfate; C agent is sodium aluminum 60%, sodium sulphate 25%, 10% silica, 5% calcium oxide.

[0015]主剂为钠基膨润土10 -15%、聚丙烯酰胺0. 1-0. 2%、超细油井水泥5 -10%,外添加剂为A剂0. 3%-0. 45%、B剂2%、C剂2%,其余为清水配制; 实施例1 : 在常温20°C条件下,将800kg钠基膨润土(200目)和24kgA剂加入到8m3水中充分搅拌20分钟,再分别称取140kg的B剂和140kg的C剂加入混合液中搅拌,最后加入400kg450 目G级油井水泥充分搅拌后得到早强段塞堵剂。 [0015] The main agent is sodium bentonite 10-15% polyacrylamide 0. 1-0. 2%, 5-10% ultrafine oil well cement, as the external additive agent A 0.3% -0. 45% B agent 2%, 2% C agent, the remainder being water preparation; Example 1: at room temperature 20 ° C conditions, the 800kg sodium bentonite (200 mesh) and 24kgA is added to the 8m3 water and stir for 20 minutes, and then were Weigh 140kg 140kg of the B component C is added and the mixture was stirred, after adding the last entry 400kg450 class G oil well cement stirred sufficiently early strength slug blocking agent.

[0016] 在常温20°C条件下,将800kg钠基膨润土(200目)和24kgA剂加入到8m3水中充分搅拌20分钟,再称取140kg的B剂和140kg的C剂加入混合液中搅拌,最后加入8kg聚丙烯酰胺(HPAM)充分搅拌30分钟后得到胶体段塞堵剂。 [0016] at room temperature 20 ° C conditions, the 800kg sodium bentonite (200 mesh) and added to the 8m3 of water 24kgA sufficiently stirred for 20 minutes, then said agent B takes 140kg and 140kg of mixture C is added with stirring, Finally 8kg added polyacrylamide (of HPAM) sufficiently stirred for 30 minutes colloidal slug blocking agent.

[0017] 在常温20°C条件下,将1200kg钠基膨润土(200目)和36kgA剂加入到8m3水中充分搅拌20分钟,再分别称取140kg的B剂和140kg的C剂加入混合液中搅拌,最后加入800kg450目G级油井水泥充分搅拌后得到强化段塞堵剂。 [0017] at room temperature 20 ° C conditions, the 1200kg sodium bentonite (200 mesh) and added to the 8m3 of water 36kgA sufficiently stirred for 20 minutes, and then were taken, said agent B 140kg and 140kg of mixture of C is added with stirring after final addition project 800kg450 class G oil well cement stirred sufficiently strengthened slug blocking agent.

[0018] 本发明提到的堵水剂体系封堵特性具有两个微观特点:一是在钠基膨润土+水泥固化浆液中,通过离子交换、团粒化作用和凝硬反应形成以水化物为骨架的结石体;二是以膨润土+聚丙烯酰胺(HPAM)浆液中利用树脂和硅酸盐等添加剂形成网状结构的紊凝体,利用两种不同堵剂体系的组合形成对油藏大孔道的有效封堵。 [0018] The blocking agent blocking characteristic mentioned system of the invention having two microscopic characteristics: First, the cement solidification + Na-bentonite slurry by ion exchange, and the role of pozzolanic aggregates formed in the reaction as the backbone hydrate stones body; Second + bentonite polyacrylamide (of HPAM) slurry of resin and additives such as a silicate condensate formed body tangled net-like structure, using a combination of two different plugging agent forming large pore reservoir effective closure.

[0019] 稠油热采井经过多周期的开采,近井地带大量稠油被采出,对地层砂冲刷剥蚀也相对严重,近井地带整体水侵孔道较大,堵剂有效堵难度较大,因此在段塞设计中采用前置早强段塞,先占据通道并具有一定强度,为后续堵剂驻留提供保护。 [0019] After thermal recovery wells mining of cycles, a large number of near wellbore heavy oil is taken out of the formation sand is relatively serious erosion erosion, water intrusion near well bore larger whole, effectively blocking agent blocking difficult Therefore the design employed slug early strength slug front, and having a first passage to occupy a certain intensity, to provide protection for subsequent plugging agent resides. 强化段塞封堵强度更高,提高堵剂的封口效果。 Strengthen slug higher blocking strength, improve the sealing effect of blocking agent. 封堵强度为强化段塞〉早强段塞〉,注入顺序为早强段塞一胶体段塞一强化段塞。 To strengthen the strength of plugging slug> early strength slug>, injection sequence is a plug-early-strength reinforcement section a colloidal slug slug.

[0020] 试验条件:实验使用单管模型,填砂管直径2. 5cm,长度19. 5cm。 [0020] Test conditions: test tube using a single model, sand filling tube diameter 2. 5cm, length 19. 5cm. 实验中将模型置入地层温度下水浴,测定填砂管的堵前渗透率,然后注入一定孔隙体积堵剂,恒温一定时问再测定填砂管的堵后渗透率,计算堵水率和残余阻力系数。 In the model experiment into a water bath at a temperature of the formation, the permeability of the sand was measured before filling and blocking the tube, and then into a certain pore volume of blocking agent, the blocking temperature is constant Q permeability sandpack measured again to calculate the residual rate and plugging OK.

[0021] 试验条件:单管模型在80°C条件下研究堵剂封堵能力,采用条件基本相同的三组模型(1#、2#、3#)进行实验。 [0021] Test conditions: Model single tube plugging blocking agent at 80 ° C for conditions using conditions substantially the same three model (# 1, # 2, # 3) experiment. 模型均注入0. 5PV,其中2#分3次交替注入,总计0. 5PV,注入堵剂后恒温24h测定封堵率。 Injection model are 0. 5PV, wherein 2 # 3 times alternating injection, a total of 0. 5PV, 24h after injection blocking agent thermostat plugging rate was measured. 备注:(1#早强段塞;2#胶体段塞;3#强化段塞) Note: (# 1 early strength slug; colloidal slug # 2; # 3 strengthening slug)

Figure CN104212422AD00051

Claims (4)

1. 一种稠油低成本改性粘土类堵水剂,其特征是由以下重量份的组分制成: 主剂为钠基膨润土10 -15%、聚丙烯酰胺0. 1-0. 2%、超细油井水泥5 -10%,外添加剂为A剂0. 3%-0. 45%、B剂2%、C剂2%,其余为清水配制; 其中,所述的A剂为碳酸钠30%、烷基磺酸钠20%、磺化酚醛树脂50% ;B剂为硅酸钠80%、 三乙醇胺10%、过硫酸铵10% ;C剂为铝酸钠60%,硫酸钠25%,氧化硅10%,氧化钙5% ; 在常温条件下,将钠基膨润土加入到水中搅拌20分钟后,再将外添加剂慢慢加入到水中搅拌,最后加入聚丙烯酰胺和超细油井水泥,充分搅拌即可配成稠油无机深部堵水剂,堵水剂的浆体密度:1.20-1. 35g/cm3。 A low-cost heavy-modified clays blocking agent, wherein parts by weight are prepared from the following components: the main agent is sodium bentonite 10-15% polyacrylamide 0. 1-02. %, 5-10% of ultrafine oil well cement, as the external additive agent a 0. 3% -0 45%, 2% B agent, 2% C agent, the remainder being water formulation;. wherein said agent is a carbonate a sodium 30%, 20% sodium alkyl sulfonate, sulfonated phenol-formaldehyde resin 50%; B agent is sodium silicate 80%, 10% triethanolamine, 10% ammonium persulfate; agent is sodium C 60% aluminum, sodium 25%, 10% silica, 5% calcium oxide; under normal temperature conditions, the sodium bentonite in water was added to the stirred for 20 minutes, and then external additives added to the water slowly with stirring, and finally adding polyacrylamide ultrafine oil cement, can be formulated heavy inorganic stir deep blocking agent, the blocking agent slurry density:. 1.20-1 35g / cm3.
2. 根据权利要求1所述的稠油低成本改性粘土类堵水剂,其特征是:所述的聚丙烯酰胺的分子量为600〜900万,水解度为15〜30%,阴离子型。 2. The modified clays of the heavy cost of blocking agent according to claim 1, characterized in that: the molecular weight of the polyacrylamide is 600~900 million and a degree of hydrolysis of 15~30%, anionic.
3. 根据权利要求1所述的稠油低成本改性粘土类堵水剂,其特征是:所述的超细油井水泥为450目G级油井超细水泥,粒径中值D50彡IOum。 D50 median particle size of the ultrafine San IOum oil well cement Class G Oil Well 450 mesh superfine cement: 3. The modified clays of the heavy cost of blocking agent according to claim 1, characterized in Yes.
4. 一种如权利要求1-3中任一项所述的稠油低成本改性粘土类堵水剂的使用方法,其特征是:堵水剂的注入顺序依次是早强段塞、胶体段塞、强化段塞,以下各组分按重量百分比计算, 其中,(1)早强段塞:钠基膨润土10%、超细油井水泥5%、A剂0. 3%、B剂2%、C剂2%, 其余为清水配制; (2) 胶体段塞:钠基膨润土10%、聚丙烯酰胺0. 1%、A剂0. 3%、B剂2%、C剂2%,其余为清水配制; (3) 强化段塞:钠基膨润土15%、超细油井水泥10%、A剂0. 45%、B剂2%、C剂2%,其余为清水配制; 所述的A剂为碳酸钠30%、烷基磺酸钠20%、磺化酚醛树脂50% ;B剂为硅酸钠80%、三乙醇胺10%、过硫酸铵10% ;C剂为铝酸钠60 %,硫酸钠25 %,氧化硅10 %,氧化钙5 %。 4. A heavy oil using the method according to any one of the cost-modified clays blocking agent as claimed in claim, characterized in that: the order plugging agent injection plug is a strong early period, colloidal slug, slug strengthening, the following components by weight percentage, wherein (1) early strength slug: 10% of sodium bentonite, ultrafine oil well cement 5%, A agent 0. 3%, B 2% agent , C agent 2%, the balance being water formulation; (2) slug colloid: 10% of sodium bentonite, polyacrylamide 0. 1%, A agent 0. 3%, 2% B agent, 2% C agent, the remaining for the preparation of water; (3) strengthen the slug: 15% of sodium bentonite, oil well cement superfine 10% a agent 0. 45%, 2% B agent, 2% C agent, the remainder being water preparation; the a agent is sodium carbonate 30%, 20% sodium alkyl sulfonate, sulfonated phenol-formaldehyde resin 50%; B agent is sodium silicate 80%, 10% triethanolamine, 10% ammonium persulfate; agent is sodium C 60% aluminum , sodium sulphate 25%, 10% silica, 5% calcium oxide.
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