大倾角油藏重力作用对注水时机影响研究
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摘要
针对重力作用对大倾角油藏注水时机存在影响的问题,运用物质平衡原理,得到重力作用影响下不同地层倾角油藏合理注水时机的定量计算方法,建立不同地层倾角的油藏数值模型。研究表明:重力作用影响下,油藏地层倾角越大,注水时机应越提前。将研究成果应用于渤海JZ油田6井区Ⅱ/Ⅲ油组,提前32 d实施注水,与未实施提前注水的区块相比,平均单井日产油量提高10%以上,综合递减率仅为8.2%,采收率提高0.9个百分点。研究成果对大倾角油藏注水方案优化具有指导意义。
In order to determine the effect of gravity on waterflooding timing in high-dip oil reservoir,a quantitative calculation method is developed based on material balance. The reservoir numerical models with different dip angles are established to quantitatively identify the effect of gravity on waterflooding timing. Research indicates that considering the gravity effect,the waterflooding timing should be advanced with the increase of formation dip angle.This research is applied to the Ⅱ/Ⅲ wellgroups in Wellblock 6 of Bohai JZ Oilfield and waterflooding is implemented 32 days in advance. Comparing with the producing performances of areas without advanced waterflooding,the average daily oil production rate per well in Ⅱ/Ⅲ wellgroups has been enhanced by more than 10%,the comprehensive production decline rate is only 8. 2% and the corresponding oil recovery factor is enhanced by 0. 9 persentage points. This research could provide certain guidance for the waterflooding program optimization in high-dip oil reservoir.
In order to determine the effect of gravity on waterflooding timing in high-dip oil reservoir,a quantitative calculation method is developed based on material balance. The reservoir numerical models with different dip angles are established to quantitatively identify the effect of gravity on waterflooding timing. Research indicates that considering the gravity effect,the waterflooding timing should be advanced with the increase of formation dip angle.This research is applied to the Ⅱ/Ⅲ wellgroups in Wellblock 6 of Bohai JZ Oilfield and waterflooding is implemented 32 days in advance. Comparing with the producing performances of areas without advanced waterflooding,the average daily oil production rate per well in Ⅱ/Ⅲ wellgroups has been enhanced by more than 10%,the comprehensive production decline rate is only 8. 2% and the corresponding oil recovery factor is enhanced by 0. 9 persentage points. This research could provide certain guidance for the waterflooding program optimization in high-dip oil reservoir.
引文
[1]贾红兵.层状油藏重力渗流机理及其应用[J].石油学报,2012,33(1):112-116.
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[10]龙秋莲,陈秋芬.TTHW-趾端至跟部驱油法进行重力稳定注水开发的实验室研究——Hele Shaw模型试验结果[J].钻采工艺,2007,30(1):65-67.
[11]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(4):53-55.
[12]徐春碧,黄小亮,唐海,等.低渗透油藏注水开发时机研究[J].钻采工艺,2011,34(2):53-55.
[13]王黎,饶良玉,李薇,等.苏丹P油田注水时机实验及数值模拟研究[J].西南石油大学学报(自然科学版)2011,33(3):109-114.
[14]高永荣,刘尚奇,张霞.沈84断块高凝油油藏开采方式模拟研究[J].特种油气藏,1996,3(2):18-21.
[2]李波,李廷礼,张迎春.高渗透砂岩油藏注水时机实验研究[J].石油学报,2007,28(1):78-82.
[3]杨文新,金崯,何建华,等.特低渗透储层的应力敏感性研究及应用[J].石油天然气学报,2011,33(11):113-116.
[4]谢晓庆,姜汉桥,王全柱,等.低渗透油藏压敏效应与注水时机研究[J].石油学报,2009,30(4):574-582.
[5]李凤霞.重力泄油室内实验及油藏模拟[J].特种油气藏,2004,11(5):118-119.
[6]王小林,王杰祥.层状非均质油藏不稳定注水室内实验研究[J].特种油气藏,2009,16(3):79-81.
[7]葛宏选,党海龙,解伟.变形介质油藏非线性不稳定渗流特征研究[J].非常规油气,2015,2(3):50-56.
[8]唐建东,刘同敬,姜汉桥,等.低渗透油藏超前注水合理时机理论研究[J].新疆地质,2007,25(2):192-195.
[9]王道富,李忠兴,赵继勇,等.低渗透油藏超前注水理论及其应用[J].石油学报,2007,28(6):78-81.
[10]龙秋莲,陈秋芬.TTHW-趾端至跟部驱油法进行重力稳定注水开发的实验室研究——Hele Shaw模型试验结果[J].钻采工艺,2007,30(1):65-67.
[11]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(4):53-55.
[12]徐春碧,黄小亮,唐海,等.低渗透油藏注水开发时机研究[J].钻采工艺,2011,34(2):53-55.
[13]王黎,饶良玉,李薇,等.苏丹P油田注水时机实验及数值模拟研究[J].西南石油大学学报(自然科学版)2011,33(3):109-114.
[14]高永荣,刘尚奇,张霞.沈84断块高凝油油藏开采方式模拟研究[J].特种油气藏,1996,3(2):18-21.