高温静态渗吸实验技术在三塘湖油田注水吞吐机理研究中的应用——以NJH、M56区块基质岩心为例
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摘要
渗吸实验作为注水吞吐提高采收率技术驱油机理实验,对油田注水吞吐措施参数优化提供数据支持。通过设计两组渗吸实验,分别研究了三塘湖油田NJH区块砂岩、M56区块凝灰岩渗吸规律,并针对M56区块凝灰岩进行了压力、含油饱和度、油水黏度比、表面活性剂等渗吸影响因素研究。实验表明:直径为2.5cm,长度大于直径1.5倍的小直径岩心在渗吸初、中、后期呈现明显规律:渗吸初期渗吸速度快,渗吸中期渗吸速度减慢,渗吸后期渗吸速度趋于零,渗吸达到平衡。渗吸采收率的增长趋势也是由快至慢的过程。而不同渗吸影响因素实验因子的设计结果表明:压力、含油饱和度、油水黏度比、表面活性剂等因素对渗吸采收率及渗吸时间都有不同程度的影响。
As an oil displacement mechanism experiment of water-flood huff and puff technology to improve oil recovery efficiency,the imbibition experiment provides data support for parameter optimization of water injection huff and puff measures. Two groups of imbibition experiments were designed to study the imbibition law of sandstone in Block NJH and the imbibition law of tuff in Block M56 in STH oilfield. The studies on influence factors of imbibition such as pressure,oil saturation,oil and water viscosity ratio, and surfactants are carried out for tuff of Block M56. The experiment shows that a small diameter core with a diameter of 2.5 cm and a length greater than 1.5 times the diameter shows obvious regularity in the initial, middle and later period of imbibition. At the initial stage of imbibition,the imbibition velocity is fast, the mid-term imbibition velocity of imbibition is slow,the imbibition velocity tends to zero at the later stage of imbibition, and the imbibition reaches the balance. The growth trend of imbibition recovery is also from fast to slow. The experimental factors of different imbibition influence factors show that pressure,oil saturation,oil and water viscosity ratio, surface active agent and other factors have different influence on the imbibition recovery and imbibition time.
As an oil displacement mechanism experiment of water-flood huff and puff technology to improve oil recovery efficiency,the imbibition experiment provides data support for parameter optimization of water injection huff and puff measures. Two groups of imbibition experiments were designed to study the imbibition law of sandstone in Block NJH and the imbibition law of tuff in Block M56 in STH oilfield. The studies on influence factors of imbibition such as pressure,oil saturation,oil and water viscosity ratio, and surfactants are carried out for tuff of Block M56. The experiment shows that a small diameter core with a diameter of 2.5 cm and a length greater than 1.5 times the diameter shows obvious regularity in the initial, middle and later period of imbibition. At the initial stage of imbibition,the imbibition velocity is fast, the mid-term imbibition velocity of imbibition is slow,the imbibition velocity tends to zero at the later stage of imbibition, and the imbibition reaches the balance. The growth trend of imbibition recovery is also from fast to slow. The experimental factors of different imbibition influence factors show that pressure,oil saturation,oil and water viscosity ratio, surface active agent and other factors have different influence on the imbibition recovery and imbibition time.
引文
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[12]崔鹏兴,刘双双,党海龙.低渗透油藏渗吸作用及其影响因素研究[J].非常规油气,2017,4(1):88-93.
[13]许建红,马丽丽.低渗透裂缝性油藏自发渗吸渗流作用[J].油气地质与采收率,2015,22(3):111-114.
[14]孙琳,蒲万芬,辛君,等.表面活性剂对低渗岩心高温渗吸的影响[J].中国石油大学学报(自然科学版),2012,36(6):103-107.
[15]黄大志,向丹.注水吞吐采油机理研究[J].油气地质与采收率,2004,11(5):39-43.
[2]Z.T.Karpyn, P.M.Halleck,A.S.Grader.An experimental study of spontaneous imbibition in fractured sandstone with contrasting sedimentary layers[J].Journal of Petroleum Science and Engineering,2009,48-56
[3]Zhou Zhou; Tadesse Teklu; Xiaopeng Li; Abass Hazim; Experimental study of the osmotic effect on shale matrix imbibition process in gas reservoirs[J]. Journal of Natural Gas Science and Engineering,2018,1-7
[4]Morsy S,Sheng J.J.Imbibition Characteristics of the Barnett Shale Formation[J].SPE,168984,2014
[5]王敉邦,蒋林宏,包建银,等.渗吸实验描述与方法适用性评价[J].石油化工应用,2015,34(12):102-105.
[6]Akbarabadi,M.,Piri,M.Nanotomography of the Spontaneous Imbibition in Shale[J].Society of Petroleum Engineers,2014,1922555
[7]谢坤,卢祥国,陈欣,胡广斌,张脊.高温低渗油藏中表面活性剂溶液渗吸效果影响因素研究[J].西安石油大学学报(自然科学版),2015,05:80-84+10-11.
[8]孔辉,张婧.基于正交试验的影响渗吸因素研究[J].当代化工,2016,07:1396-1398.
[9]李洪,李治平,王香增,等.表面活性剂对低渗透油藏渗吸敏感因素的影响[J].石油钻探技术,2016,05:100-103.
[10]ZHOU Z,ABASS H,LI X,et al.Mechanisms of imbibition during hydraulic fracturing in shale formations[J].Journal of PetroleumScienceandEngineering,2016,141:125-132.
[11]陈俊宇,唐海,李宁,张清秀,廖华伟,刘琦.脉冲渗吸水驱油机理实验研究与分析[J].海洋石油,2009,(1):71-74.
[12]崔鹏兴,刘双双,党海龙.低渗透油藏渗吸作用及其影响因素研究[J].非常规油气,2017,4(1):88-93.
[13]许建红,马丽丽.低渗透裂缝性油藏自发渗吸渗流作用[J].油气地质与采收率,2015,22(3):111-114.
[14]孙琳,蒲万芬,辛君,等.表面活性剂对低渗岩心高温渗吸的影响[J].中国石油大学学报(自然科学版),2012,36(6):103-107.
[15]黄大志,向丹.注水吞吐采油机理研究[J].油气地质与采收率,2004,11(5):39-43.