浅层疏松砂岩稠油油藏聚合物驱矿场试验效果评价
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摘要
哈萨克斯坦CB油田具有埋藏浅、胶结疏松、地下原油黏度大、地层水矿化度高、储层高孔高渗的特点,经过多年的注水开发后,地层非均质性加剧、注水波及效率低、采出程度低、综合含水高,油水关系日趋复杂,开发效果亟待改善。开展聚合物驱试验的目的是通过优选适合CB油田特征的抗盐聚合物体系,实现封堵高渗流通道、改善吸水剖面、增大水驱波及体积,达到深度调驱、提高采收率的目的。通过在油田4个井组应用聚合物复合弱凝胶实施聚合物驱试验,结果表明聚合物复合弱凝胶有较强的适应性,注聚施工后井组平均日产油量增加了21. 7 t,平均含水下降了7. 7%,降水增油效果显著,累计增油超过2×104t。建议在该油田针对不同区块的地质油藏特点精选注聚井组,通过推广应用逐步扩大注聚规模、形成集中效应,不断提升油田的开发效果。
CB oilfield in Kazakhstan is characterized by shallow-buried,loose-cemented,with high oil viscosity,high formation water salinity and high porosity and permeability reservoir. After years of waterflood development,formation heterogeneity becomes higher,waterflood sweep efficiency is low,recovery degree is low,water cut is high,oil-water relationship becomes more complex,development effect needs to be improved. The purpose of polymer flooding experiment is to plug high permeability crossflow channels,improve water injection profile,increase the sweep volume of water flooding,realize deep profile control and flooding,and enhance oil recovery by optimizing salt-resistant polymer system,which is suitable for the characteristics of CB oilfield. By using polymer composite weak gel in four well groups of the oil field to carry out the polymer flooding experiment,the result shows that the polymer composite weak gel has strong adaptability. After the polymer injection,the average well group daily oil production increases by 21. 7 t,the average water cut decreased by 7. 7%,the effect of oil production increasing and water cut decreasing is significant,and the cumulative oil production increases more than 20 000 t. It is suggested that polymer injection wells should be selected carefully according to the characteristics of different geological areas in the oilfield,and the injection scale should be gradually enlarged by popularizing application to form a concentrated effect,so as to continuously improve the development effect of CB oilfield.
CB oilfield in Kazakhstan is characterized by shallow-buried,loose-cemented,with high oil viscosity,high formation water salinity and high porosity and permeability reservoir. After years of waterflood development,formation heterogeneity becomes higher,waterflood sweep efficiency is low,recovery degree is low,water cut is high,oil-water relationship becomes more complex,development effect needs to be improved. The purpose of polymer flooding experiment is to plug high permeability crossflow channels,improve water injection profile,increase the sweep volume of water flooding,realize deep profile control and flooding,and enhance oil recovery by optimizing salt-resistant polymer system,which is suitable for the characteristics of CB oilfield. By using polymer composite weak gel in four well groups of the oil field to carry out the polymer flooding experiment,the result shows that the polymer composite weak gel has strong adaptability. After the polymer injection,the average well group daily oil production increases by 21. 7 t,the average water cut decreased by 7. 7%,the effect of oil production increasing and water cut decreasing is significant,and the cumulative oil production increases more than 20 000 t. It is suggested that polymer injection wells should be selected carefully according to the characteristics of different geological areas in the oilfield,and the injection scale should be gradually enlarged by popularizing application to form a concentrated effect,so as to continuously improve the development effect of CB oilfield.
引文
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12 杨红斌,蒲春生,李淼,等.自适应弱凝胶调驱性能评价及矿场应用[J].油气地质与采收率,2013,20(6):83-86Yang Hongbin,Pu Chunsheng,Li Miao,et al. Laboratory evaluation and field application on profile control of self-adaptive weak gel[J]. Petroleum Geology and Recovery Efficiency,2013,20(6):83-86
13 沈非,程林松,黄世军,等.不同注聚时机聚合物驱含水率变化规律研究[J].科学技术与工程,2016,16(17):149-152Shen Fei,Chen Linsong,Huang Shijun,et al. Research on variation of polymer injection water-cut at different injection time[J].Science Technology and Engineering,2016,16(17):149-152
14 靳彦欣,史树彬,付玮,等.特高含水油藏深部调剖技术界限研究[J].特种油气藏,2015,22(3):77-80Jin Yanxin,Shi Shubin,Fu Wei,et al. Technical limits of in-depth profile control in extra-high water-cut reservoirs[J]. Special Oil and Gas Reservoirs,2015,22(3):77-80
15 黄颖辉,刘东,李金蔓,等.弱凝胶矿场调驱效果评价方法研究[J].油气藏评价与开发,2013,3(2):62-65Huang Yinghui,Liu Dong,Li Jinman,et al. Research on effect evaluation methods of weak gel field flooding[J]. Reservoir Evaluation and Development,2013,3(2):62-65
16 侯维虹.聚合物驱油层吸水剖面变化规律[J].石油勘探与开发,2007,34(4):478-482Hou Weihong. Water injection profile variation of oil layers under polymer flooding[J]. Petroleum Exploration and Development,2007,34(4):478-482
17 高淑玲,邵振波,顾根深.霍尔曲线在聚驱过程中的应用[J].大庆石油地质与开发,2007,26(3):119-121Gao Shuling,Shao Zhenbo,Gu Genshen. Application of Hall curve in polymer flooding[J]. Petroleum Geology&Oilfield Development,2007,26(3):119-121
2 秦义,张立东,刘小军,等.复合深部调剖体系在高盐稠油油藏中的应用[J].科学技术与工程,2016,16(21):215-218Qin Yi,Zhang Lidong,Liu Xiaojun,et al. The application of compound deep profile control system on high salinity heavy oil reservoir[J]. Science Technology and Engineering,2016,16(21):215-218
3 顾文欢,杨宝泉,苑志旺,等.疏松砂岩油藏大孔道发育特征研究[J].科学技术与工程,2014,14(23):32-36Gu Wenhuan,Yang Baoquan,Yuan Zhiwang,et al. The study of water channeling development characteristics in unconsolidated sandstone reservoir[J]. Science Technology and Engineering,2014,14(23):32-36
4 贾文峰,陈作,眭世元,等.实验及模拟研究两性疏水缔合聚合物增粘机理[J].科学技术与工程,2017,17(3):213-217Jia Wenfeng,Chen Zuo,Sui Shiyuan,et al. Thickening mechanism of amphoteric hydrophobically associating polymer by experimental study and simulation[J]. Science Technology and Engineering,2017,17(3):213-217
5 吴海涛,张思顿,范俊强,等.适合稠油油藏的新型复合降粘驱油体系研究与应用[J].科学技术与工程,2017,17(1):204-207Wu Haitao,Zhang Sidun,Fan Junqiang,et al. Research and application of new type of composite viscosity reduction and oil displacement system for heavy oil reservoir[J]. Science Technology and Engineering,2017,17(1):204-207
6 刘丽,刘福奎,皮彦夫,等.非均质性对聚合物驱开发指标的影响[J].科学技术与工程,2010,10(26):6435-6438Liu Li,Liu Fukui,Pi Yanfu,et al. The influence of reservoir heterogeneity to development index of polymer flooding[J]. Science Technology and Engineering,2010,10(26):6435-6438
7 张玮,张宁,王成胜,等.平面非均质性对渤海B油田注聚效果的影响实验研究[J].科学技术与工程,2017,17(10):182-187Zhang Wei,Zhang Ning,Wang Chengsheng,et al. Experimental study on the effect of plane heterogeneity on polymer injection in Bohai B oilfield[J]. Science Technology and Engineering,2017,17(10):182-187
8 董雯,张贵才,葛际江,等.耐温抗盐水膨体调剖堵水剂的合成及性能评价[J].油气地质与采收率,2007,14(6):72-75Dong Wen,Zhang Guicai,Ge Jijiang,et al. Synthesis and behavior evaluation of water-blocking agent with temperature-resist and salt-tolerant swellable particle[J]. Petroleum Geology and Recovery Efficiency,2007,14(6):72-75
9 郭程飞,李华斌,李飞洋,等.剪切作用及矿化度对弱凝胶性能影响实验[J].科学技术与工程,2015,15(3):90-94Guo Chengfei,Li Huabin,Li Feiyang,et al. Effect of shearing and salinity on the properties of the weak gel[J]. Science Technology and Engineering,2015,15(3):90-94
10 柳长春.耐温耐盐聚合物驱油体系的研制[J].钻采工艺,2005,29(3):82-83Liu Changchun. Development of temperature resistance and salt tolerance polymer flooding system[J]. Drilling&Production Technology,2005,29(3):82-83
11 张冲,李季,黄芬,等.耐温耐盐新型聚合物驱油剂性能评价[J].油田化学,2007,24(3):228-231Zhang Chong,Li Ji,Huang Fen,et al. Performance properties of AM/AMPS/N-PMI tercopolymer L00 and L05 as heat resistant and salt tolerant polymer for EOR[J]. Oilfield Chemistry,2007,24(3):228-231
12 杨红斌,蒲春生,李淼,等.自适应弱凝胶调驱性能评价及矿场应用[J].油气地质与采收率,2013,20(6):83-86Yang Hongbin,Pu Chunsheng,Li Miao,et al. Laboratory evaluation and field application on profile control of self-adaptive weak gel[J]. Petroleum Geology and Recovery Efficiency,2013,20(6):83-86
13 沈非,程林松,黄世军,等.不同注聚时机聚合物驱含水率变化规律研究[J].科学技术与工程,2016,16(17):149-152Shen Fei,Chen Linsong,Huang Shijun,et al. Research on variation of polymer injection water-cut at different injection time[J].Science Technology and Engineering,2016,16(17):149-152
14 靳彦欣,史树彬,付玮,等.特高含水油藏深部调剖技术界限研究[J].特种油气藏,2015,22(3):77-80Jin Yanxin,Shi Shubin,Fu Wei,et al. Technical limits of in-depth profile control in extra-high water-cut reservoirs[J]. Special Oil and Gas Reservoirs,2015,22(3):77-80
15 黄颖辉,刘东,李金蔓,等.弱凝胶矿场调驱效果评价方法研究[J].油气藏评价与开发,2013,3(2):62-65Huang Yinghui,Liu Dong,Li Jinman,et al. Research on effect evaluation methods of weak gel field flooding[J]. Reservoir Evaluation and Development,2013,3(2):62-65
16 侯维虹.聚合物驱油层吸水剖面变化规律[J].石油勘探与开发,2007,34(4):478-482Hou Weihong. Water injection profile variation of oil layers under polymer flooding[J]. Petroleum Exploration and Development,2007,34(4):478-482
17 高淑玲,邵振波,顾根深.霍尔曲线在聚驱过程中的应用[J].大庆石油地质与开发,2007,26(3):119-121Gao Shuling,Shao Zhenbo,Gu Genshen. Application of Hall curve in polymer flooding[J]. Petroleum Geology&Oilfield Development,2007,26(3):119-121
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