静态渗吸对致密油开采效果的影响及其应用
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摘要
致密油储层的孔喉细小、渗透率低,使得开发难度较大,但是以毛管力为基础的静态渗吸作用对致密油的开采十分有利。利用自行研制的静态渗吸实验测量装置,进行了大量室内实验,研究出致密储层的渗吸规律及其影响因素。实验结果表明,温度升高,静态渗吸采出程度明显增加;静态渗吸采出程度受边界条件的影响;降低地层水的矿化度,渗吸采出程度增加。另外,对实验结果进行无因次化处理,曲线归一性较好,可用于估计实际致密储层的渗吸开采效果,这对提高致密储层的采收率具有重要的指导意义。
The tight oil resource is extremely abundant in China,but the production and researches of tight oil is just at the beginning stage.There are great challenges in developping the tight reservoirs.Although small pore size and low permeability can greatly increase the development difficulty,spontaneous imbibition mostly resulted from the capillary pressure is a very important and useful way for tight oil production.In the laboratory experiments through the homemade imbibition apparatus and the effects of different parameters on the imbibition recovery factor was investigated.The results show that the imbibition recovery factor is significantly increased with the increasing of temperature.For rocks with similar parameters,the recovery factor is increased as the formation water salinity decreases within a certain range.The recovery factor by imbibition varied due to the different boundary conditions.In addition,the curves show good normalization character after processing the data with dimensionless,which can be used to estimate the actual production efficiency of the field.Undoubtedly,the research is of great significance for effectively developing the tight oil reservoir.
The tight oil resource is extremely abundant in China,but the production and researches of tight oil is just at the beginning stage.There are great challenges in developping the tight reservoirs.Although small pore size and low permeability can greatly increase the development difficulty,spontaneous imbibition mostly resulted from the capillary pressure is a very important and useful way for tight oil production.In the laboratory experiments through the homemade imbibition apparatus and the effects of different parameters on the imbibition recovery factor was investigated.The results show that the imbibition recovery factor is significantly increased with the increasing of temperature.For rocks with similar parameters,the recovery factor is increased as the formation water salinity decreases within a certain range.The recovery factor by imbibition varied due to the different boundary conditions.In addition,the curves show good normalization character after processing the data with dimensionless,which can be used to estimate the actual production efficiency of the field.Undoubtedly,the research is of great significance for effectively developing the tight oil reservoir.
引文
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[13]周凤军,陈文明.低渗透岩心渗吸实验研究[J].复杂油气藏,2009,2(1):54-56.Zhou Fengjun,Chen Wenming.Study on spontaneous experiment of low permeability core[J].Complex Hydrocarbon Reservoirs,2009,2(1):54-56.
[14]曲岩涛,戴志坚,李桂梅,等.SY/T 5336—2006岩心分析方法[S].北京:石油工业出版社,2006.
[15]McGuirc P L,Chatham J R,Paskvan F K,et al.Low salinity oil recovery:An exciting new FOR opportunity for Alaska's North Slope[R].SPE 93903,2005.
[16]Nasralla R A,Bataweel M A,Nasr-EI-Din H A.Investigation of wettability alteration by low salinity water in sandstone rock[R].SPE 146322,2011.
[17]Ma S,Zhang X,Morrow N R,et al.Characterization of Wettability from Spontaneous Imbibition Measurements[J].Journal of Canadian Petroleum Technology,1999,38(13):1-8.
[18]Mattax C C,Kyte J R.Imbibition oil recovery from fractured water drive reservoir[J].SPE,1962(6):84-177.
[19]Ma S,Morrow N R,Zhang,X.“Generalized scaling of spontaneous imbibition data for strongly water-wet system[C].Regina,Saskctchenan,Canada:[s.n.],1995.
[2]邹才能,陶士振,杨智,等.中国非常规油气勘探与研究新进展[J].矿物岩石地球化学通报,2012,31(4):312-322.Zhou Caineng,Tao Shizhen,Yang Zhi,et al.New advance in unconventional petroleum exploration and research in China[J].Bulletin of Mineralogy,Petrology and Geochemistry,2012,31(4):312-322.
[3]秦积舜,李爱芬.油层物理学[M].北京:中国石油大学出版社,2006.
[4]蔡建超,郁伯铭.多孔介质静态渗吸研究进展[J].力学进展,2012,42(6):735-754.Cai Jianchao,Yu Bomin.Advances in studies of spontaneous imbibition in porous media[J].Advances In Mechanics,2012,42(6):735-754.
[5]Takahashi S,Kovscek A R.Wettabillity estimation of low-permeability,Siliceous shale using surface force[J].Journal of Petroleum Science and Engineering,2010,75:33-43.
[6]李士奎,刘卫东,张海琴,等.低渗透油藏静态渗吸驱油实验研究[J].石油学报,2007,28(2):109-112.Li Shikui,Liu Weidong,Zhang Haiqin,et al.Experimental study of spontaneous imbibition in low-permeability reservoir[J].Acta Petrolei Sinica,2007,28(2):109-112.
[7]张星.低渗透砂岩油藏渗吸规律研究[M].北京:中国石化出版社,2013.
[8]刘卫东,姚同玉.表面活性剂体系渗吸[M].北京:石油工业出版社,2007.
[9]Bourbiaux J B,Kalayjian F J.Experimental study of cocurrent and countercurrent flows in natural porous media[C].SPE RE&Ev.1990,8:361-368.
[10]Pooladi-Darvish and Firoozabadi.Cocurrent and countercurrent imbibition in a water-wet matrix block[J].SPE Journal,2000,5(1):3-11.
[11]李爱芬,凡田友,赵琳.裂缝性油藏低渗透岩心静态渗吸实验研究[J].油气地质与采收率,2011,18(5):67-69.Li Aifen,Fan Tianyou,Zhao Lin.Experimental study of spontaneous imbibition in low-permeability core,fractured reservoir[J].Petroleum Geology and Recovery Efficiency,2011,18(5):67-69.
[12]周志斌,王杰祥,王腾飞.裂缝性低渗透油藏氮气泡沫调驱技术研究[J].石油化工高等学校学报,2016,29(1):31-34.Zhou Zhibin,Wang Jiexiang,Wang Tengfei.Nitrogen foam profile control and displacement technology applied in naturally fractured low-permeability reservoir[J].Journal of Petrochemical Universities,2016,29(1):31-34.
[13]周凤军,陈文明.低渗透岩心渗吸实验研究[J].复杂油气藏,2009,2(1):54-56.Zhou Fengjun,Chen Wenming.Study on spontaneous experiment of low permeability core[J].Complex Hydrocarbon Reservoirs,2009,2(1):54-56.
[14]曲岩涛,戴志坚,李桂梅,等.SY/T 5336—2006岩心分析方法[S].北京:石油工业出版社,2006.
[15]McGuirc P L,Chatham J R,Paskvan F K,et al.Low salinity oil recovery:An exciting new FOR opportunity for Alaska's North Slope[R].SPE 93903,2005.
[16]Nasralla R A,Bataweel M A,Nasr-EI-Din H A.Investigation of wettability alteration by low salinity water in sandstone rock[R].SPE 146322,2011.
[17]Ma S,Zhang X,Morrow N R,et al.Characterization of Wettability from Spontaneous Imbibition Measurements[J].Journal of Canadian Petroleum Technology,1999,38(13):1-8.
[18]Mattax C C,Kyte J R.Imbibition oil recovery from fractured water drive reservoir[J].SPE,1962(6):84-177.
[19]Ma S,Morrow N R,Zhang,X.“Generalized scaling of spontaneous imbibition data for strongly water-wet system[C].Regina,Saskctchenan,Canada:[s.n.],1995.