含水率与驱替倍数异常曲线校正方法研究
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摘要
含水率与驱替倍数关系曲线作为研究水驱油规律的一条重要曲线,对油田水淹规律、剩余油挖潜以及含水率上升规律有着重要的指导作用。但在实验过程中,由于受岩心尺寸较小及高黏原油水油流度比的影响,在无水采油期、低含水期甚至中含水期无法获取准确的实验数据,出现了曲线异常现象。因此,建立了含水率与驱替倍数数学关系式,并对渤海部分稠油油田水驱实验得到的含水率与驱替倍数三类异常曲线进行了校正,根据校正后曲线对M5-2油田进行了水淹图绘制,进而指导该油田剩余油挖潜。
As an important curve to understand the law of water flooding, the relationship between water cut and displacement multiples plays an important guiding role in understanding the rules of oilfield flooding, tapping the remaining oil and the law of water cut. However, during the experiment, due to the small size of core and high viscosity of crude oil and water, the accurate experimental data can not be obtained during the dry recovery period, the low water cut period or the middle water cut period, and the abnormal curve appears. The paper creatively establishes mathematical relation between water cut and displacement multiple,and corrects three kinds of abnormal curves of water cut and displacement multiple obtained from water flooding experiments in some heavy oilfields of Bohai Sea. According to the corrected curve, the water flooded map of M5-2 oilfield is drown up, which guides the remaining oil tapping the potential of the field.
As an important curve to understand the law of water flooding, the relationship between water cut and displacement multiples plays an important guiding role in understanding the rules of oilfield flooding, tapping the remaining oil and the law of water cut. However, during the experiment, due to the small size of core and high viscosity of crude oil and water, the accurate experimental data can not be obtained during the dry recovery period, the low water cut period or the middle water cut period, and the abnormal curve appears. The paper creatively establishes mathematical relation between water cut and displacement multiple,and corrects three kinds of abnormal curves of water cut and displacement multiple obtained from water flooding experiments in some heavy oilfields of Bohai Sea. According to the corrected curve, the water flooded map of M5-2 oilfield is drown up, which guides the remaining oil tapping the potential of the field.
引文
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[2]王秀臣.注水倍数对驱替效率的影响研究[J].河南科学,2017,35(1):139-143.Wang X C.Effect of waterflooding multiple on flooding efficiency[J].Journal of Henan Sciences, 2017,35(1):139-143.
[3]焦龙.S油田特高含水期驱替倍数对驱油效果的影响研究[D].大庆:东北石油大学,2014.
[4]张士奇,周志军,张小静,等.双河油田注水倍数和驱替倍数对采出程度影响[J].特种油气藏,2014,21(3):93-96.Zhang S Q, Zhou Z J, Zhang X J, et al.Effects of water filling ratio and flooding multiplier on coal mining production in Shuanghe Oilfield[J].Special Oil Gas Reservoirs,2014,21(3):93-96.
[5]贾乐.低渗透岩心注水倍数与含水率变化关系实验研究[J].中国西部科技,2013,12(6):35-36.Jia L.The experimental studies on the relation of PV and water content of low permeability cores[J]. Western China Science and Technology,2013,12(6):35-36.
[6]许亚南,龙明,张运来,等.海上多层合采稠油油藏高含水期油水渗流规律实验研究[J].新疆石油天气,2017,13(4):37-40.Xu Y N,Long M, Zhang Y L,et al.Experimental study on seepage of oil and water of offshore heav oil reservoirs at high water cut stage[J].Xinjiang Oil and Gas,2017,13(4):37-40.
[7]高旺来,沈德煌,李芳芳.稠油相对渗透率实验中管线死体积校正方法[J].西南石油大学学报(自然科学版),2014,36(1):129-133.Gao W L, Shen D H, Li F F. Correction method for the dead volume of core exit end pipeline in heavy oil relative permeability experiment[J]. Journal of Southwest Petroleum University(Science Technology Edition),2014,36(1):129-133.
[8]何更生,油层物理[M].北京:石油工业出版社,2011.
[9]姜汉桥,姚军,姜瑞忠.油藏工程原理与方法[M].东营:中国石油大学出版社,2006:86-90.
[10]乔霞,刘卫丽,聂延波,等.块状边底水油藏水淹规律研究[J].长江大学学报(自科版),2014,11(32):83-86.Qiao X, Liu W L,Nie Y B, et al. Study on the water flooding law of the water reservoir under the block of the block[J].Journal of Yangtze University(Natural Science Edition),2014,11(32):83-86.
[11]王飞,张军,梁绍洪.小层水淹图的绘制及在中原油田文10块的应用[J].内江科技,2014,35(7):34.Wang F, Zhang J, Liang S H.The drawing of small waterflood map and the application of 10 blocks in Zhongyuan oilfield[J].Neijiang Technology,2014,35(7):34.
[12]陈萍.计算机快速绘制水淹图技术研究[J].化工管理,2014(5):93.Chen P.Research on the rapid water flooding diagram of the computer[J].Chemical Enterprise Management, 2014(5):93.