Temperature-resistant and salt-tolerant mixed surfactant system for EOR in the Tahe Oilfield

A new temperature-resistant and salt-tolerant mixed surfactant system(referred to as the SS system)for enhancing oil recovery at the Tahe Oilfield(Xinjiang,China)was evaluated.Based on the analysis of the crude oil,the formation water and rock components in the Tahe Oilfield,the long-term thermal stability,salt tolerance and the ability to change the wettability,interfacial activity and oil washing efficiency of the mixed surfactant system were studied.The system contains the anionic surfactant SDB and another cationic surfactant SDY.When the total mass concentration of the SS solution is 0.15 wt%,m(SDB)/m(SDY)ratio is 1 to 1,and excellent efficiencies are achieved for oil washing for five kinds of Tahe Oilfield crude oils(more than 60%).In addition,after adding cationic surfactant,the adsorption capacity of the surfactant is further reduced,reaching 0.261 mg/g.The oil displacement experiments indicate that under a temperature of 150°C and a salinity of 24.6×104 mg/L,the SS system enhances the oil recovery by over 10%after water flooding.The SS anionic–cationic surfactant system is first presented in the open literature that can be successfully applied to obtain predictions of Tahe Oilfield carbonate reservoirs with a high temperature and high salinity.

Synthesis of temperature-resistant and salttolerant surfactant SDB-7 and its performance evaluation for Tahe Oilfield flooding (China)

In order to improve the enhanced oil recovery of high-temperature and high-salt oilfields, a novel temperature-resistant and salt-tolerant surfactant （denoted as SDB-7） was synthesized and evaluated for the Tahe Oilfield （Xinjiang, China）, which is representative of high-temperature and high-salt oilfields. It has a central reservoir temperature of 140 ℃ and salinity of 22.6× 10^4 mg/L. The temperature-resistant and salt-tolerant performance, interfacial activity, oil displacement efficiency, aging properties, and adsorption properties of the synthesized surfactant were evaluated for Tahe Oilfield flooding. The results showed that the SDB-7 was temperature-resistant and salt-tolerant capacity of 140 ℃ and 22.6×10^4 rag/ L, respectively, oil displacement efficiency under static condition of 84%, and adsorption loss of 0.4 mg/ g （less than 1 mg/g-oil sand）. In the heat aging experiment （under the temperature of 140 ℃ for 60 days）, the oil-water interracial tension and oil displacement efficiency of SDB-7 were almost unchanged. The oil displacement experiments showed that, under the temperature of 140 ℃ and the salinity of 22.6× 10^4 mg/L, the surfactant SDB-7 can enhance oil recovery by 14.5% after water flooding,suggesting that SDB-7 has a promising application in high temperature and high salinity （HT/HS） reservoir.

Characterization of salt tolerance and Fusarium wilt resistance of a sweetpotato mutant

The variant LM1 was previously obtained using embryogenic cell suspension cultures of sweetpotato variety Lizixiang by gamma-ray induced mutation, and then its characteristics were stably inherited through six clonal generations, thus this mutant was named LM1. In this study, systematic characterization of salt tolerance and Fusarium wilt resistance were performed between Lizixiang and mutant LM1. LM1 exhibited significantly higher salt tolerance compared to Lizixiang. The content of proline and activities of superoxide dismutase（SOD） and photosynthesis were significantly increased, while malonaldehyde（MDA） and H_2O_2 contents were significantly decreased compared to that of Lizixiang under salt stress. The inoculation test with Fusarium wilt showed that its Fusarium wilt resistance was also improved. The lignin, total phenolic, jasmonic acid（JA） contents and SOD activity were significantly higher, while H_2O_2 content was significantly lower in LM1 than that in Lizixiang. The expression level of salt stress-responsive and disease resistance-related genes was significantly higher in LM1 than that in Lizixiang under salt and Fusarium wilt stresses, respectively. This result provides a novel and valuable material for improving the salt tolerance and Fusarium wilt resistance of sweetpotato.

Temperature/salt tolerance and oil recovery of xanthan gum solution enhanced by surface-modified nanosilicas

Amide-and alkyl-modified nanosilicas(AANPs)were synthesized and introduced into Xanthan gum(XG)solution,aiming to improve the temperature/salt tolerance and oil recovery.The rheological behaviors of XG/AANP hybrid dispersions were systematically studied at different concentrations,temperatures and inorganic salts.At high temperature(75C)and high salinity(10,000 mg,L1 NaCl),AANPs increase the apparent viscosity and dynamic modulus of the XG solution,and XG/AANP hybrid dispersion exhibits elastic-dominant properties.The most effective concentrations of XG and AANP interacting with each other are 1750 mg·L^(-1) and 0.74 wt%,respectively.The temperature tolerance of XG solution is not satisfactory,and high temperature further weakens the salt tolerance of XG.However,the AANPs significantly enhance the viscoelasticity the XG solution through hydrogen bonds and hydrophobic effect.Under reservoir conditions,XG/AANP hybrid recovers approximately 18.5%more OOIP(original oil in place)than AANP and 11.3%more OOIP than XG.The enhanced oil recovery mechanism of the XG/AANP hybrid is mainly increasing the sweep coefficient,the contribution from the reduction of oil-water interfacial tension is less.

Laboratory Study on 210°C High Temperature and Salt Resistant Drilling Fluid

Combined with the current research status in this area at home and abroad, with the improvement of salt and high temperature resistance as the research goal, the laboratory research of salt and high temperature resistant drilling fluid system has been carried out, and lubricants, inhibitors and stabilizers have been optimized. The final drilling fluid formula is: water + 3% sepiolite + 0.3% Na2CO3 + 3% RH-225 + 3% KCOOH + 3% G-SPH + 3% CQA-10 + 1.5% ZX-1 + Xinjiang barite, density 2.2 g/cm3, using hot-rolling furnace, environmental scanning electron microscope, high temperature and high pressure plugging instrument and Zeiss microscopes and other instruments use core immersion experiments, permeability recovery value experiments, and static stratification index methods to perform temperature resistance, reservoir protection, plugging performance, and static settlement stability performance of the configured drilling fluid., Inhibition performance, biological toxicity, salt resistance, anti-pollution performance have been tested, and it is concluded that the temperature resistance is good under the condition of 210°C, and the salt resistance can meet the requirements of 20% NaCl + 0.5% CaCl2 concentration. It has a good reservoir protection effect, the permeability recovery value can reach more than 90%, the performance of restraining water dispersion and cuttings expansion is good, the heat roll recovery rate can reach more than 85%, and the SSSI value shows that its settlement stability performance is good;Its plugging performance is good under high temperature and high pressure. It laid the foundation for the next step to promote the field application of the drilling fluid system.

Genetic Engineering Peanut for Higher Drought- and Salt-Tolerance

Peanut (Arachis hypogaea L.) is one of the major oilseed crops, mainly grown in tropical and sub-tropical regions of the world. It is also rich in proteins, vitamins and ions, therefore it constitutes an important portion of food nutrition for people in these regions. The production of peanut is being threatened by the changing environments as the major peanut producing counties such as China, India, and USA are facing severe water shortage for peanut irrigation. The yield and quality of peanut are negatively affected by drought and salinity. Making peanut more droughtand salt-tolerant will likely sustain peanut production in countries where water shortage or saline soil are already problems. Efforts were made to genetically engineer peanut for higher tolerance to drought and salt. Analysis of these transgenic peanut plants indicated that the agronomic traits such as peanut yields were the same between wild-type and transgenic peanut plants under normal growth conditions, yet the yields of transgenic peanut plants were much higher than wild-type peanut plant under reduced irrigation conditions. Other traits such as protein content and fatty acid compositions in the seeds of transgenic peanut plants were not altered under both normal and drought conditions, indicating that the genetic manipulation of peanut for stress tolerance did not affect chemical compositions of peanut seeds in transgenic peanut plants, only increased seed yields under stress conditions.

Overexpression of the ThTPS gene enhanced salt and osmotic stress tolerance in Tamarix hispida

Trehalose is a non-reducing disaccharide with high stability and strong water absorption properties that can improve the resistance of organisms to various abiotic stresses.Trehalose-6-phosphate synthase(TPS)plays important roles in trehalose metabolism and signaling.In this study,the full-length cDNA of ThTPS was cloned from Tamarix hispida Willd.A phylogenetic tree including ThTPS and 11 AtTPS genes from Arabidopsis indicated that the ThTPS protein had a close evolutionary relationship with AtTPS7.However,the function of At TPS7 has not been determined.To analyze the abiotic stress tolerance function of ThTPS,the expression of ThTPS in T.hispida under salt and drought stress and JA,ABA and GA3 hormone stimulation was monitored by qRT-PCR.The results show that ThTPS expression was clearly induced by all five of these treatments at one or more times,and salt stress caused particularly strong induction of Th TPS in the roots of T.hispida.The ThTPS gene was transiently overexpressed in T.hispida.Both physiological indexes and staining results showed that ThTPS gene overexpression increased salt and osmotic stress tolerance in T.hispida.Overall,the Th TPS gene can respond to abiotic stresses such as salt and drought,and its overexpression can significantly improve salt and osmotic tolerance.These findings establish a foundation to better understand the responses of TPS genes to abiotic stress in plants.

Resistance to Adversity of New Poplar Clones

With four poplar clones, namely 84-323 (Populus deltoides cv. ?4-323?, 84-324 (Populus deltoides cv. ?4-324?, 79-35 (Populus ?euramericana cv. ?9-35?, and I-69 (Populus deltoides cv. 慙ux?I-69/55) as a control, researches on cold, drought and salt resistance of the clones were conducted. Electrolyte permeability under a series of low temperatures, relative water loss rate of detached leaves with time series and survival rate and growth performance in salt soil were measured. The results showed that 84-323, 84-324 and 79-35 were resistant to cold as same as I-69 (CK) and more resistant to drought and salinity than I-69 (CK).

Expression of Cryptogein in tobacco plants exhibits enhanced disease resistance and tolerance to salt stress

Cryptogein (Crypt), an elicitin secreted from Phytophthora cryptogea, was used for genetic engineering of biotic and abiotic resistance plants. We generated trans-genic tobacco plants harboring a rice phenylalanine ammo-nia-lyase (PAL) promoter and Crypt fusion gene (PAL::Crypt) or the mutated Crypt (mutation of the lysine at the position 13 to valine) under the control CaMV35S promoter (CaMV35S::CryK13V). T2 progeny of the transgenic plants showed significantly enhanced disease resistance to patho-gens of fungal Phytophthora parasitica var nicotiana (Ppn) and Alternaria alternata, and bacterial Pseudomonas syringae pv tabaci. The amount of mRNA accumulation of Crypt and CryK13V was quite low in the transgenic lines analyzed by Northern blot, and was detected by a reverse transcription PCR method. Plants harboring PAL::Crypt construct showed faster and stronger induction of PR-1a gene after Ppn inoculation than that in the wild-type plants. The re-sults suggested that the inducible PAL promoter could rap-idly respond to pathogen attack and efficiently suppress the pathogen infection. Furthermore, the enhanced tolerance to salt stress in both of the Crypt and CryK13V expressing tobacco plants was also observed compared with that in the control plants. The constitutive expression of PR and tran-scription factor genes in the transformants was probably associated with the salt tolerance. The above observations suggested that a cross-talk between biotic and abiotic stresses existed in tobacco plants.

Overexpression of a Chloroplast-located Peroxiredoxin Q Gene, SsPrxQ, Increases the Salt and Low-temperature Tolerance of Arabidopsis

Ablotlc stress, such as salt, drought and extreme temperature, can result in enhanced production of reactive oxygen species （ROS）. Plants have developed both enzymatic ROS-scavenging and non-enzymatic ROS-scavenging systems. The major ROS-scavenging enzymes of plants include superoxide dismutase （SOD）, ascorbate peroxldaae （APX）, catalaae （CAT）, glutathione peroxldaae （GPX） and peroxiredoxina （Prxa）. In the present work, we identified a gene encoding chloroplast-located peroxiredoxin Q, SsPrxQ, from Suaeda salsa L. located at chloroplast. Overexpression of SsPrxQ In Arabidopsis leads to an increase In salt and low-temperature tolerance.

环保型改性纳米碳酸钙降滤失剂的合成与性能评价

纳米碳酸钙在钻井液中具有降滤失及封堵作用、且环保,但分散性差、易团聚,导致效果不理想。使用硅烷偶联剂对纳米碳酸钙进行表面改性,再通过自由基共聚法将抗温、抗盐单体接枝到改性纳米碳酸钙表面,得到改性纳米碳酸钙降滤失剂SDNPJ-2,采用红外光谱(FTIR)、热重分析进行表征,同时对比评价其综合性能,通过对膨润土基浆粒径、zeta电位分析,滤饼扫描电镜(SEM)分析,考察SDNPJ-2在黏土颗粒上的吸附特征,研究改性纳米碳酸钙降滤失剂在水基钻井液中的降滤失机制。结果表明:SDNPJ-2可抗230℃高温;1%SDNPJ-2可分别使4%膨润土基浆、25%盐水基浆、10%CaCl_(2)基浆150℃/(16 h)老化后的API滤失量降低70%、89%和85%,可抗氯化钠250000 mg/L、抗氯化钙100000 mg/L,降滤失效果优于国外同类目前最优产品Driscal D;生化需氧量(BOD_(5))为558 mg/L、BOD_(5)/COD(化学需氧量)达22.6%,可生物降解;SDNPJ-2通过酰胺基团吸附于黏土表面、改善其分散性,优化体系粒径级配、通过物理堆积有效封堵滤饼和地层孔隙,两方面协同达到优良的降滤失效果。

抗220℃高温两性离子聚合物降黏剂的制备与性能

针对当前高温高密度水基钻井液流变性调控难题,基于分子结构优化设计和单体优选,制备了新型抗高温两性离子聚合物降黏剂HP-THIN。通过正交实验与单因素实验相结合的方法,对HP-THIN的制备条件进行了优化。采用红外光谱仪、乌氏黏度计和热重分析仪等分别对HP-THIN的分子结构、热稳定性以及相对分子质量进行表征和测定,研究了HP-THIN在220℃超高温条件下对淡水浆、盐水浆、含钙浆和高密度复合盐水浆等不同类型钻井液基浆的降黏性能。在室温下,测试了HP-THIN对基浆黏土颗粒吸附能力、Zeta电位和粒径的影响,并与国内外同类产品(Polythin和xy-27)进行了对比。结果表明,合成降黏剂HP-THIN的反应温度为60℃,反应时间为3 h,引发剂用量和链转移剂用量均为反应单体总量的1%,单体总质量分数为30%;单体AM、AA、AMPS、PTM物质的量比为1.9∶7.5∶2.1∶1。该聚合物的分子结构中含有设计官能团,其黏均相对分子质量约为8211,且具有较好的热稳定性。220℃老化后,HP-THIN在最优加量(0.3%)下对淡水基浆、盐水基浆、含钙基浆和高密度复合盐水基浆的降黏率分别达86%、72%、73%和51%,HP-THIN对不同类型钻井液基浆的高温降黏效果均优于国内外同类产品,相对于xy-27和Polythin,降黏剂HP-THIN对基浆黏土吸附能力强、Zeta电位绝对值大、黏土颗粒尺寸小,可以更好地消除黏土颗粒间网状结构,降低钻井液黏度,具有良好的应用前景。

AMPS/DMAEMA/AM三元共聚物钻井液降滤失剂的研制

以丙烯酰胺、2-丙烯酰胺-2-甲基丙磺酸和甲基丙烯酸二甲氨基乙酯为单体,过硫酸铵为引发剂,采用水溶液聚合法制备了PAAD降滤失剂,通过单因素实验对其制备工艺进行了优化,并对降滤失剂的耐温耐盐性能进行了探究。结果表明,在丙烯酰胺、2-丙烯酰胺-2-甲基丙磺酸和甲基丙烯酸二甲氨基乙酯质量比为4∶2∶0.02、反应温度为60℃、反应时间4 h、过硫酸铵用量为混合单体质量的0.15%的最佳条件下,所制备的降滤失剂的降滤失效果最佳,抗温达210℃。

高温高矿化度油藏提高采收率用聚合物驱油剂研究

为满足高温高矿化度油藏继续提高采收率的需求,室内以丙烯酰胺、2-丙烯酰胺-2-甲基丙磺酸、长碳链疏水单体和刚性单体为合成原料,制备了一种耐温抗盐型聚合物驱油剂KWY300,并对其综合性能进行了评价。结果表明,聚合物驱油剂KWY300具有良好的增黏性能和耐温抗盐性能,当溶液矿化度为133000 mg/L,老化温度为110℃时,质量浓度为1200 mg/L的聚合物溶液黏度值仍能达到80 mPa·s以上,增黏效果明显优于HPAM。聚合物驱油剂KWY300具有良好的渗流性能,在储层温度和矿化度条件下,阻力系数可以达到50以上,残余阻力系数约为10。此外,聚合物驱油剂KWY300还具有良好的驱油效果,注入PV数为0.5、质量浓度为1200 mg/L的KWY300溶液后,能使岩心水驱后的采收率继续提高16.4%,驱油效果明显优于HPAM。高温高矿化度油藏现场实施聚合物KWY300驱油措施后,区块内生产井的日产油量提升至措施前的3倍以上,含水率有所下降,起到了明显增油效果。

耐盐瓜胶合成及其溶胀性能研究

针对瓜胶原粉抗盐性差的问题,通过化学改性制得耐盐瓜胶,并用红外光谱仪对产物进行了结构表征。进一步考察了相对分子质量、粒径、搅拌转速、温度、盐离子等对其溶胀性能影响。结果表明:制备的耐盐瓜胶相对分子质量越小、粒径越小,速溶性能越好;相对分子质量和粒径过小均会导致耐盐瓜胶增黏性降低。搅拌速度和温度增加均有助于溶解。一价离子相对于二价离子对耐盐瓜胶的溶胀增黏性影响较小,SEM观测不同盐溶液中耐盐瓜胶分子的构型有差别。合成的耐盐瓜胶具有一定的耐盐性,速溶性较好,可适用于海上连续混配液需求。

水杨酸对甜糯玉米幼苗抗寒、抗盐生理影响分析

为探究低温和盐胁迫下水杨酸对甜糯玉米幼苗抗性生理的影响,以甜糯玉米182为试验材料,通过外源叶面喷施水杨酸(SA),测定幼苗的生长特性、渗透调节物质、丙二醛(MDA)含量、过氧化氢酶(CAT)和过氧化物酶(POD)活性,从而明确水杨酸对甜糯玉米幼苗抗寒及抗盐生理的影响.结果表明:3℃低温和100 mmol/L NaCl处理使甜糯玉米幼苗的正常生长受到显著抑制,经不同浓度水杨酸喷施均能有效缓解低温胁迫和盐胁迫对幼苗造成的不利影响,其中以40 mg/L SA处理效果最佳.喷施40 mg/L水杨酸,使玉米幼苗株高、干物质积累、叶片相对含水量、可溶性糖和可溶性蛋白含量都出现不同程度的增加,MDA含量降低,抗氧化物酶CAT和POD活性增强.因此推测,通过叶面喷施水杨酸可能加强了胁迫条件下植株的渗透调节能力,增强了抗氧化酶的活性,减少了膜的损伤程度,综合提高了甜糯玉米幼苗的抗寒与抗盐能力.

荒漠植物花花柴HTR基因家族表达模式及其增强细菌抗逆性分析

【目的】荒漠植物花花柴具有耐盐碱、耐高温等优异的广谱抗逆性,是新疆珍贵的天然抗逆植物种质资源。挖掘花花柴耐极端温度和耐盐基因,系统分析其在高温、低温和高盐胁迫下表达模式以及抗逆性,对于利用该基因增强作物抗逆性、稳产性、丰产性,促进荒漠植物基因资源的发掘利用都具有重要意义。【方法】采用盆栽花花柴幼苗进行不同时长的高温(45℃)、低温(4℃)和高盐(400 mmol/L Na^(+))胁迫处理,采集幼苗的根、茎、叶组织,利用RT-PCR等技术克隆花花柴HTR基因家族(KcHTRs),分析KcHTRs基因表达情况,同时通过原核表达体系分析其抗逆性以及表达蛋白质的最佳诱导条件。【结果】(1)从荒漠植物花花柴高温转录组数据中筛选并克隆了KcHTR基因家族的7个成员,通过构建原核表达载体并诱导表达,明确其cDNA长度在708~789 bp之间,所表达的蛋白质分子量在27~29 kD之间;(2)发现在大肠杆菌BL21最适生长温度37℃下该家族蛋白的最佳诱导表达体系:OD600为0.8,IPTG诱导浓度为0.5 mmol/L,诱导时间为8~10 h;(3)通过对重组大肠杆菌的模拟高温、低温、盐胁迫处理,结果显示KcHTRs能够在一定程度上增强宿主对高温、低温和高盐的耐受性。【结论】KcHTRs具有优异的广谱抗逆性,主要具有耐极端温度的抗逆性,且能够积极响应花花柴植株应对逆境胁迫。

AMPS单体和缔合单体的引入对聚合物流变性及驱油性能影响研究

研究了引入AMPS单体形成的超高分多元共聚物(HMWP)和引入缔合单体形成的超高分缔合聚合物(AP-P5)的流变性能与驱油性能。室内实验表明,引入AMPS单体和缔合单体均可以显著提高聚合物的增黏性能与黏弹性能。浓度为2000 mg/L时,相对于常规聚合物,AP-P5与HMWP黏度分别提高250.0%和85.1%,黏弹复合模量分别提高36.7%和34.3%,60 d黏度保留率分别为60.9%和82.6%;静态吸附实验发现,HMWP浓度超过200 mg/L,吸附量趋于平衡,而AP-P5随着浓度的增加吸附量逐渐增加;驱油实验结果表明,AP-P5与HMWP的提高采收率幅度分别为11.0%和15.7%,因此,引入AMPS单体更有利于高温高盐油藏聚合物驱油效果提升。现场实验表明,HMWP降水增油效果显著,可以为胜利油田高温高盐油藏大幅度提高采收率提供技术支持。

耐盐性PAM-AMPS/Fe_(3)O_(4)纳米减阻剂流变性

采用丙烯酰胺/2-丙烯酰胺基-2-甲基丙磺酸(AM/AMPS)共聚物接枝纳米Fe_(3)O_(4)合成了一种PAM-AMPS/Fe_(3)O_(4)纳米减阻剂,并利用动态流变仪研究了PAM-AMPS/Fe_(3)O_(4)减阻剂的剪切稀释性,分析了纳米Fe_(3)O_(4)、盐含量及剪切作用对其流变行为的影响规律。结果表明:PAM-AMPS/Fe_(3)O_(4)纳米减阻剂的粒径为100~500 nm、黏均分子质量为4.99×10^(6)g/mol;在30℃下,剪切速率大于0.3 s^(-1)时PAM-AMPS/Fe_(3)O_(4)减阻剂表现出显著的剪切稀释特征,该减阻剂具有更复杂的微观结构,其超临界质量分数为0.035%,相比空白聚合物表现出更优良的增黏性能和黏弹性;由于AMPS含有耐温耐盐基团,在NaCl和CaCl2质量分数分别为10%和5%的条件下,PAM-AMPS/Fe_(3)O_(4)减阻剂黏度保留率分别为69%和53%,表现出了较强的耐盐性;同时,该减阻剂在剪切速率1000 s^(-1)条件下剪切3600、7200 s后的黏度回复率分别为100%和94%,表现出良好的耐剪切性。

耐温耐盐两性聚丙烯酰胺稠化剂的制备及其性能

为了提高压裂液稠化剂的耐温耐盐性能,以丙烯酰胺(AM)、丙烯酸(AA)、阴离子单体2-丙烯酰胺-2-甲基丙磺酸(AMPS)和阳离子单体丙烯酰氧乙基三甲基氯化铵(DAC)为单体,单体AM、AA、AMPS、DAC质量比为9∶1∶3∶1.5,将单体以总质量分数为30%溶于水中(水相),将质量分数为10%的乳化剂(Span-80、Tween-80质量比为9∶1)溶于白油(油相),油水相比为1∶2.5,合成了具有耐温耐盐性的油包水乳液稠化剂PAAD,其黏均相对分子质量为383×10^(4)。通过红外光谱和核磁共振氢谱表征了PAAD,测定了聚合物PAAD的耐温性、抗盐性、耐剪切和破胶性能。研究结果表明,PAAD具有良好的耐温抗剪切性能,在90℃、剪切速率为170 s^(-1)下,质量分数为1.5%的PAAD聚合物溶液剪切1.5 h后黏度保持在51.7 mPa·s。PAAD溶液在高剪切后进入低剪切区后可快速恢复黏度,可保障悬砂不沉降。PAAD具有良好的抗盐性,在矿化度为50 g/L的模拟高盐海水中,质量分数为1.5%的PAAD聚合物溶液的黏度为45 m Pa·s。在90℃下,破胶剂用量为0.2%时,质量分数为1.5%的PAAD聚合物溶液在3 h内可完成破胶,破胶液的表面张力为30 mN/m,油水界面张力为1.9 mN/m,残渣含量为220 mg/L,对岩心基质的伤害性为9%,达到行业标准要求。