丘德尔油田提高采收率技术的可行性实验研究

发布时间：2018-01-15 17:08

本文关键词：丘德尔油田提高采收率技术的可行性实验研究　出处：《东北石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：丘德尔-杰恩果朴油田经过水驱开发,已经进入高含水期,产液含水率已经达到92%。为了达到油田高含水期稳油控水的效果,本文研究了针对该区块水驱后的提高采收率技术,并优选了最适合该区块的方法。为了研究该区块聚合物驱的可行性,本文评价了几种常见抗盐聚合物的增粘能力、耐温能力、热稳定性、吸附特性、注入能力以及驱油效果。结果表明,在实际油藏条件下,北京华鼎聚合物的各项性能均优于其他抗盐聚合物,并与地层有良好的配伍性;聚合物驱油能在水驱基础上提高5.1%-12.8%左右,室内驱油实验效果较好;综合考虑聚合物用量和采收率提高幅度,浓度为2000mg/L、段塞为0.6PV为最佳方案。为了研究该区块表面活性剂驱的可行性,本文评价了几种常见表面活性剂的改善油水界面张力能力、吸附特性以及驱油效果。结果表明,在实际油藏条件下,表面活性剂HDS改善油水界面张力特性较好,但在油藏中的吸附量较大;表面活性剂能在水驱基础上提高1.6%-6.6%,从采收率提高的幅度来考虑,表面活性剂质量分数为0.2%、段塞为0.3PV为最佳方案。为了研究该区块聚/表二元复合驱的可行性,本文评价了由北京华鼎聚合物与表面活性剂HDS复配二元复合体系的增粘性、改善油水界面张力特性以及驱油效果。结果表明,在实际油藏条件下,复配二元复合体系的各项性能均能达到要求,二元复合驱油的室内实验效果较好,能在水驱基础上提高10%-15%;段塞大小0.4PV、聚合物浓度2500mg/L+表面活性剂质量分数0.2%为最佳方案。为了研究该区块硫酸驱的可行性,本文测定了该区块天然岩心中碳酸盐的含量,分析了硫酸与水的放热作用,并测定了硫酸对岩心渗透率的增加幅度,最后,通过室内驱油试验,评价了硫酸的驱油效果,优选了硫酸的注入量。结果表明,碳酸盐岩天然砂中碳酸盐的含量在83.08%-90.49%左右,平均含量为86.96%。可见实际油藏的碳酸盐含量较高,在85%以上;硫酸注入量从0.1PV增加到0.2PV时,硫酸驱增油效果较明显,提高的采收率从8.95%增加到10.73%;而当注入量达到0.3PV时,过量的硫酸与碳酸盐反应生成大量石膏,对岩心造成较严重的伤害,致使注入压力快速升高,但出口端却不产液;硫酸驱提高采收率效果较好,能在水驱基础上增加7-10%;最佳的硫酸注入量为0.2PV。
[Abstract]:Chudel Jane fruit Park oilfield after water flooding development, has entered the high water cut stage, water production rate has reached 92%. in order to achieve high watercut stage oil stabilization and water control effect is studied in this paper according to the block after water flooding EOR technology, and selected the most suitable method in this area in order to block. The feasibility study of the block of polymer flooding, this paper evaluates several common salt resistant polymer thickening ability, temperature resistance, thermal stability, adsorption properties, injection ability and oil displacement effect. The results showed that in the actual conditions of the reservoir, the performance of Beijing Hua Dingju complexes are better than that of other salt resistant polymer, and compatibility well with the formation; oil can improve the 5.1%-12.8% on the basis of water flooding or polymer flooding, indoor effect for oil displacement experiments; considering the amount of polymer and the recovery rate increase, the concentration of 2000mg/L, 0.6PV for Slug The best scheme. In order to study the feasibility of the block of surfactant flooding, this paper evaluates several common surfactants to improve the interfacial tension, adsorption characteristics and oil displacement effect. The results showed that in the actual conditions of the reservoir, surfactant HDS improved the interfacial tension of oil-water well, but the adsorption capacity of the reservoir is large; surfactant can improve 1.6%-6.6% on the basis of water flooding recovery from increase to consider, the surfactant mass fraction is 0.2%, 0.3PV is the best scheme for slug. In order to study the feasibility of table two yuan / block polymer composite flooding, this paper evaluates the viscosity increase by two yuan compound system in Beijing Ting polymer and surfactant HDS compound, improve the interfacial tension of oil-water and oil displacement effect. The results showed that in the actual conditions of the reservoir, the performance of the two element composite compound system can reach to the For better indoor experiment effect of two components flooding oil, can improve the 10%-15% on the basis of water flooding; slug size 0.4PV, 2500mg/L+ concentration of polymer surfactant mass fraction of 0.2% is the best scheme. In order to study the feasibility of the block sulfate flooding, the content of natural rock block carbonate were measured in this paper analyzed the heat and water effect of sulfuric acid, sulfuric acid increase on core permeability was determined finally, through laboratory oil displacement test, evaluation of sulfuric acid flooding effect, injection volume of optimized sulfuric acid. The results showed that the carbonate content of carbonate in natural sand in about 83.08%-90.49%, the average content of carbonate content visible 86.96%. the actual reservoir is high, above 85%; sulfate injection volume increased from 0.1PV to 0.2PV, sulfuric acid flooding effect were improved, the recovery rate increased from 8.95% to 10.73%; and when the injection rate reached 0.3 PV, sulfate and carbonate reaction generates large amounts of excess gypsum, causing serious damage to the core, the injection pressure increases rapidly, but the export side but not producing liquid sulfuric acid; EOR effect is good, can increase the 7-10% on the basis of water flooding; the best sulfate injection volume was 0.2PV.

【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE357.4

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