考虑气水界面推进的底水凝析气藏直井见水时间预测
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摘要
预测底水凝析气藏见水时间通常不考虑气水界面推进的影响,预测结果存在一定偏差。文中在综合考虑气水界面推进、凝析油析出、水质点舌进等基础上,分析了底水凝析气藏气水界面运移规律,并基于物质平衡与渗流理论,建立了底水凝析气藏直井见水时间预测公式;运用单因素分析法研究了气藏厚度、采气速度及水侵速度对见水时间的影响。结果表明:文中建立的公式能准确地预测见水时间;见水时间随气藏厚度的增加而增加,且气藏厚度越大,气水界面推进对见水时间的影响越大;见水时间随采气速度的增加而减少,且采气速度越大,气水界面推进对见水时间的影响越小;见水时间随水侵速度的增加而减少。
At present, the influence of dynamic gas-water interface is usually not considered for the time prediction of water breakthrough in bottom water condensate gas reservoir, and the prediction result is not accurate. Considering dynamic gas-water boundary, condensate and water tonguing, the migration law of gas-water interface in bottom-water condensate gas reservoirs is analyzed. With the theory of material balance and seepage, the predictive formula of water breakthrough time in bottom water condensate gas reservoirs is established. Comparing with an example, the accuracy of the formula is verified. And the effects of gas reservoir thickness, gas production rate and water invasion rate on water breakthrough time are studied by single factor analysis. The results show that water breakthrough time increases with the gas reservoir thickness. With the increase of gas reservoir thickness, the effect of dynamic gas-water interface on water breakthrough time is great. The water breakthrough time decreases with the increase of gas production rate. With the increase of gas production rate, the effect of dynamic gas-water interface on water breakthrough time is smaller. The water breakthrough time decreases with the increase of water invasion rate. It is concluded that the influence of dynamic gas-water interface on the water breakthrough time in the bottom water gas-condensate reservoir should be taken into account. And the formula can accurately predict water breakthrough time in the bottom water condensate gas reservoir.
At present, the influence of dynamic gas-water interface is usually not considered for the time prediction of water breakthrough in bottom water condensate gas reservoir, and the prediction result is not accurate. Considering dynamic gas-water boundary, condensate and water tonguing, the migration law of gas-water interface in bottom-water condensate gas reservoirs is analyzed. With the theory of material balance and seepage, the predictive formula of water breakthrough time in bottom water condensate gas reservoirs is established. Comparing with an example, the accuracy of the formula is verified. And the effects of gas reservoir thickness, gas production rate and water invasion rate on water breakthrough time are studied by single factor analysis. The results show that water breakthrough time increases with the gas reservoir thickness. With the increase of gas reservoir thickness, the effect of dynamic gas-water interface on water breakthrough time is great. The water breakthrough time decreases with the increase of gas production rate. With the increase of gas production rate, the effect of dynamic gas-water interface on water breakthrough time is smaller. The water breakthrough time decreases with the increase of water invasion rate. It is concluded that the influence of dynamic gas-water interface on the water breakthrough time in the bottom water gas-condensate reservoir should be taken into account. And the formula can accurately predict water breakthrough time in the bottom water condensate gas reservoir.
引文
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[16]方飞飞,李熙喆,高树生,等.边、底水气藏水侵规律可视化实验研究[J].天然气地球科学,2016,27(12):2246-2252.
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[18]李元生,杨志兴,藤赛男,等.考虑储层倾角和水侵的边水气藏见水时间预测研究[J].石油钻探技术,2017,41(1):91-96.
[19]赵晓亮,廖新维,赵伦,等.一种新的计算油气界面移动距离的方法[J].天然气工业,2010,30(1):59-60.
[2]ERIC M A,IGBOKOYI A O.Breakthrough time correlations for coning in bottom water supported reservoirs[R].SPE 167511,2013.
[3]LI L F,YUE X A,ZHAO H L,et al.A novel method for predicting breakthrough time of horizontal wells in bottom water reservoirs[J].Journal of Central South University,2013,20(12):3612-3619.
[4]张庆辉,屈信忠,柳金城,等.低渗透底水气藏压裂气井见水时间预测[J].新疆石油地质,2014,35(1):77-81.
[5]张庆辉,李相方,张磊,等.考虑启动压力梯度的低渗底水气藏见水时间预测[J].石油钻探技术,2012,40(5):96-99.
[6]王会强,李晓平,吴锋,等.边水气藏气井见水时间预测方法[J].特种油气藏,2008,15(4):73-74.
[7]朱维耀,黄小荷,岳明.底水气藏水平井见水时间研究[J].科技导报,2014,32(8):27-31.
[8]黄全华,陆云,陈冲.带隔板底水气藏见水时间预测方法[J].岩性油气藏,2016,28(4):82-87.
[9]刘华勋,任东,高树生,等.边、底水气藏水侵机理与开发对策[J].天然气工业,2015,35(2):47-53.
[10]王会强,李晓平,杨琪,等.底水气藏见水时间预测方法[J].新疆石油地质,2007,28(1):92-93.
[11]张烈辉,严谨,李允,等.考虑凝析油析出时的底水凝析气藏见水时间预测新方法[J].天然气工业,2004,24(7):74-75.
[12]IANNIE V R,KIRK B.Predicting water breakthrough using pressure transient analysis in a gas condensate reservoir in the Columbus Basin,Trinidad[R].SPE 158496,2012.
[13]WU K,LI X.A new method to predict wate r breakthrou gh time in an edge water condensate gas reservoir considering retrograde condensation[J].Petroleum Science and Technology,2013,17(11):1738-1743.
[14]吴克柳,李相方,张公涛,等.考虑反凝析的边水凝析气藏见水时间预测新方法[J].科学技术与工程,2011,11(19):4574-4577.
[15]LI Z J,LI J Q,YAN W D.Numerical simulation study on the key influencing factors of water-invasion performance for the gas wells with bottom-water[J].Advanced Materials Research,2017,884(14):104-107.
[16]方飞飞,李熙喆,高树生,等.边、底水气藏水侵规律可视化实验研究[J].天然气地球科学,2016,27(12):2246-2252.
[17]李涛.普光气田开发过程水侵特征分析[J].天然气工业,2014,34(6):65-71.
[18]李元生,杨志兴,藤赛男,等.考虑储层倾角和水侵的边水气藏见水时间预测研究[J].石油钻探技术,2017,41(1):91-96.
[19]赵晓亮,廖新维,赵伦,等.一种新的计算油气界面移动距离的方法[J].天然气工业,2010,30(1):59-60.