残酸对原油脱水的影响及处理

酸对原油的破乳具有较大的影响,盐酸的存在使原油脱水发生困难,特别是在稠油中,脱水效率降低;土酸对原油脱水影响比盐酸更大,脱出水颜色发黑,发黄,有大量底渣存在;残酸对原油的脱水影响最大,脱水速度减慢,水色不清,过渡带加长.针对酸化后原油pH值较低的特点,选择碳酸钠作碱化剂,复配低温2#破乳剂,进行了室内实验和现场试验,结果表明:原油脱水效果明显,脱出水颜色清,油水过渡带清晰,保证返排液的pH值保持在6～8的范围内,使原油含水质量分数低于2%.     

岩心表面润湿性与化学选堵剂对油水的封堵能力

选择阳离子聚丙烯酰胺类选堵剂,进行岩心模拟实验,研究不同岩心表面润湿性与化学选堵剂封堵能力之间的关系.表面润湿性强烈影响对水的堵塞率,水润湿性越强,对水的堵塞率越高,典型的亲水表面和亲油表面对水的堵塞率相差20%左右;使用水基凝胶,水驱后的残余阻力系数(RRF)大于油驱后的RRF,水基凝胶使水相渗透率的降低比油相渗透率的降低多.对于润湿性相同,渗透率不同的天然岩心,选堵剂的堵水率大于85%,堵油率在20%左右,表现出良好的选择性.     

镉(Ⅱ)-环丙沙星化合物的合成、晶体结构、抗菌与抗肿瘤活性

A new Cadmium(Ⅱ)-Ciprofloxacin ionic compound, (HCPFX)₂[CdCl₄]·3H₂O, is synthesized and its crystal structure is determined. The crystallography data are as follows, monoclinic, space group P2₁/c, a=1.010 39(6) nm, b=1.399 89(9) nm, c=2.822 45(18) nm, β=95.765 0(10)°, V=3.972 0(4) nm³, Z=4, D_c=1.627 g·cm^-3, F(000)=1 984. R₁=0.054 0, wR₂=0.150 3 (I>2σ(I)). In the title compound, four chloride ions are coordinated to the cadmium ion forming a slightly distorted tetrahedron. Both Ciprofloxacin and the compound were assayed against gram-positive and gram-negative bacteria by doubling dilutions method, the compound shows the same minimal inhibitory concentration (MIC) as the Ciprofloxacin against S. Aureus, M. Lutens, E. Coli and P. Aeruginosa bacteria. The inhibitory effect of the two compounds on leukemia HL-60 cell line has been measured by using MTT (Methyl-Thiazol-Tetrozolium) assay method. The results indicate that the complex has very strong inhibitory effect on HL-60 cell line. CCDC: 259367.     

阳离子型弱凝胶调驱剂的性能与应用

研究了阳离子型弱凝胶调驱剂的组成与性能,调驱剂主要由阳离子聚丙烯酰胺和交联剂组成,配方为(质量分数):0.5%阳离子聚合物+0.03%～0.06%的交联剂.使用大量的弱凝胶驱替时,油相渗透率恢复值为92.6%,水相渗透率的恢复值仅为15.3%,油相渗透率的恢复值明显大于水相渗透率的恢复值.岩心实验表明,该调驱剂岩心封堵率大于90%,突破压力梯度0.4 MPa·cm.现场试验一口井,注水压力上升3.2 MPa,吸水剖面有效厚度增加了20.3 m,与其相连通的4口油井累计增油3 570t,累计降水26 100t,投入产出比1:3.24,具有良好的经济效益.     

污油泥调剖剂的研究与性能评价

通过分析油田产出含油污泥组分和粒径,确定以含油污泥为主要原材料,添加适当化学药剂和固相颗粒得到一种新型含油污泥调剖剂.合理配方(质量分数)为:污油泥50%+悬浮剂0.2%～0.3%+乳化剂0.3%～0.4%+膨润土8%+水,固含量大于15.65%,调剖剂体系稳定,不产生分层现象.岩心实验表明,当孔喉与颗粒粒径之比在9.0～12.0时,调剖剂可以顺利进入岩心,实现稳态注入,当固相颗粒加入量大于8%时,岩心封堵率可达94%.该技术有助于解决含油污泥外排造成的环境污染问题,为油田综合治理、降低生产成本提供了一项新措施.