王璐,杨胜来,孟展,陈彦昭,李滢,徐斌
WANG Lu,YANG Shenglai,MENG Zhan,CHEN Yanzhao,LI Ying,XU Bin

• 1:中国石油大学石油工程教育部重点实验室

摘要(Abstract)：

高凝油油藏普遍采用注水开发方式,但冷水驱替会对储层产生伤害,影响水驱油效率。为完全模拟实际储层条件,采用含气原油进行水驱油室内实验,分别研究温度、渗透率、注水倍数、注水速率和润湿性对高凝油油藏水驱油效率的影响。研究发现:温度主要通过改变原油黏度和析蜡来影响驱油效率,驱油效率随温度的变化曲线具有明显的3个阶段;渗透率在原油析蜡前对驱油效率影响较大,但随着温度降低,析出的蜡质形成具有一定强度的空间网状结构堵塞渗流通道,导致渗透率的影响逐渐减小;随着注水倍数的增加,驱油效率呈上升趋势,但注水后期上升缓慢;相同注水倍数下,注水速率在析蜡前后对高凝油油藏的影响规律不同,针对不同储层温度合理选择注水速率对提高驱油效率十分关键。
Developing mode of the water flooding is commonly adopted for high pour-point oil reservoirs,but the cold water flooding will cause the reservoir damage and influence the oil displaced efficiency. In order to fully simulate the actual reservoir conditions,the live oil was used to conduct the water flooding experiment,the influences of the temperature,permeability,water injection multiple,water injection rate,wettability on the efficiency were respectively researched for the high pour-point oil reservoir. The studies found that the temperature affects the oil displaced efficiency mainly by changing the oil viscosity and wax precipitation,and moreover the changed curve shows three distinct phases; the permeability has a greater influence on the displaced efficiency before the precipitated wax,however,as the temperature decreases,the precipitated wax forms the spatial network structure with a certain strength and thus plugs the seepage channels,then the influence of the permeability decreases gradually; with the increase of the water injection multiple,the oil displaced efficiency presents the rising trend,but later the rise lowers down at the later stage of the water flooding; under the condition of the same multiple,the influence laws of the water injection rate are different before and after the wax precipitation for the high pour-point oil reservoir,so it iscritical to choose the reasonable water injection rate in the light of different reservoir temperatures to improve the oil displaced efficiency.

关键词(KeyWords)： 驱油效率;高凝油油藏;水驱;室内实验;含气原油
oil displacement efficiency;high pour-point oil reservoir;water flooding;indoor experiment;live oil

Abstract:

Keywords:

基金项目(Foundation): 国家科技重大专项“大型油气田及煤层气开发”资助课题“苏丹3/7区高凝油油藏高效开发技术”(2011ZX05032-002)

作者(Author): 王璐,杨胜来,孟展,陈彦昭,李滢,徐斌
WANG Lu,YANG Shenglai,MENG Zhan,CHEN Yanzhao,LI Ying,XU Bin

参考文献(References)：

• [1]张方礼,张志昌,许宁,等.高凝油油藏地质与开发[M].北京:石油工业出版社,2007:1-2.
• [2]吕成远.油藏条件下油水相对渗透率实验研究[J].石油勘探与开发,2003,30(4):102-104.
• [3]曹建,蒲万芬,赵金洲,等.蒸气吞吐井产能预测方法[J].天然气工业,2006,26(3):98-99.
• [4]阳晓燕,杨胜来,吴向红,等.注水对高凝油藏温度场影响的数值模拟研究[J].复杂油气藏,2011,4(3):51-53.
• [5]谢文彦,李晓光,陈振岩,等.辽河油区稠油及高凝油勘探开发技术综述[J].石油学报,2007,28(4):145-150.
• [6]姚凯,姜汉桥,党龙梅,等.高凝油油藏冷伤害机制[J].中国石油大学学报(自然科学版),2009,33(3):95-98.
• [7]宫宝,李松源,田晓东,等.评价水驱油田开发效果的系统工程方法[J].大庆石油地质与开发,2015,34(5):58-63.
• [8]杨滨,方洋,姜汉桥,等.提高高凝油油藏水驱效率实验研究[J].钻采工艺,2012,35(6):94-97.
• [9]田乃林,张丽华.高凝油驱油效率的室内实验研究[J].大庆石油地质与开发,1997,16(3):56-58.
• [10]Moreno R B Z L.Residual-Oil Saturation for a Very Long Unconsolidated Core,With Live Oil at Reservoir Conditions[R].SPE139322,2010.
• [11]App J F,Burger J E.Experimental Determination of Relative Permeabilities for a Rich Gas/Condensate System Using Live Fluid[R].SPE 109810,2007.
• [12]Sung Hyun Jang,Pathma Jith Liyanage,Jun Lu,et al.Microemulsion Phase Behavior Measurements Using Live Oils at High Temperature and Pressure[R].SPE 169169,2014.
• [13]高明,宋考平,吴家文,等.高凝油油藏注水开发方式研究[J].西南石油大学学报(自然科学版),2010,32(2):93-96.
• [14]姜彬,邱凌,刘向东,等.固相沉积模型在高凝油藏注水开发中的应用[J].石油学报,2015,36(1):101-105.
• [15]王瑞飞,孙卫.特低渗透砂岩微观模型水驱油实验影响驱油效率因素[J].石油实验地质,2010,32(1):93-97.
• [16]Kariznovi M,Nourozieh H,Jamialahmadi M,et al.Optimization of Asphaltene Deposition and Adsorption Parameter in Porous Media Search[R].SPE 114037,2008.