应用物质平衡法评价鸭儿峡M油藏地层压力
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摘要
鸭儿峡M油藏具有断层发育、饱和压力低、边水极弱等特征,为了准确把握该油藏最佳注水时机,必须实时准确掌握地层压力水平。基于物质平衡原理,考虑岩石和流体的高压物性随地层压力变化,利用岩石孔隙体积和油水体积的动态变化关系,得到能够实时跟踪弹性开采阶段和注水开发阶段的地层压力计算公式,在实验准确获取岩石和流体高压物性参数后,实现地层压力计算。结果表明,采用物质平衡法计算的M油藏平均地层压力为40. 5 MPa,与试井解释结果仅相差0. 5 MPa;岩石孔隙体积缩小量与流体体积缩小量误差为2. 0%,物性参数取值可靠。物质平衡法为应用生产动态资料实时准确评价封闭或弱、边底水油藏的地层压力提供了新的思路。
The M reservoir in Yaerxia oilfield has the characteristics of fault development,low saturation pressure and extremely weak edge water. For clarifying the optimal water flooding time of the reservoir,it is necessary to understand the formation pressure accurately in real time. Considering that high pressure physical properties of rock and fluids change with the formation pressure,and the dynamic changes of reservoir pore volume and oil-water volume,the calculation formula of formation pressure was obtained according to the principle of material balance,and it can calculate the formation pressure after acquiring the high-pressure physical properties of rock and fluids,so as to keep real-time track on the formation pressure in the elastic production and waterflooding stages. The results show that the average formation pressure of M reservoir obtained by using the material balance method is 40. 5 MPa,only 0. 5 MPa different from the results of well testing. In addition,the error of reservoir pore volume compressibility and fluid volume compressibility is 2%,suggesting that the value of physical parameters is reliable. The material balance method provides a new idea for the application of production performance data to evaluate the formation pressure of closed or weak edge/bottom water reservoirs in real time manner.
The M reservoir in Yaerxia oilfield has the characteristics of fault development,low saturation pressure and extremely weak edge water. For clarifying the optimal water flooding time of the reservoir,it is necessary to understand the formation pressure accurately in real time. Considering that high pressure physical properties of rock and fluids change with the formation pressure,and the dynamic changes of reservoir pore volume and oil-water volume,the calculation formula of formation pressure was obtained according to the principle of material balance,and it can calculate the formation pressure after acquiring the high-pressure physical properties of rock and fluids,so as to keep real-time track on the formation pressure in the elastic production and waterflooding stages. The results show that the average formation pressure of M reservoir obtained by using the material balance method is 40. 5 MPa,only 0. 5 MPa different from the results of well testing. In addition,the error of reservoir pore volume compressibility and fluid volume compressibility is 2%,suggesting that the value of physical parameters is reliable. The material balance method provides a new idea for the application of production performance data to evaluate the formation pressure of closed or weak edge/bottom water reservoirs in real time manner.
引文
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[8]张娟.临南洼陷现今地层压力系统解析[J].工程地球物理学报,2018,15(3):276-283.ZHANG Juan.The analysis of current formation pressure system in Linnan Sag[J].Chinese Journal of Engineering Geophysics,2018,15(3):276-283.
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[14]DARYASAFAR A,AMAREH I,FATHI N M,等.基于瞬时产量递减分析确定天然裂缝性油藏平均地层压力[J].石油勘探与开发,2015,42(2):229-232.DARYASAFAR A,AMAREH I,FATHI N M,et al.Application of the transient rate decline analysis for determining average reservoir pressure in naturally fractured reservoirs[J].Petroleum Exploration and Development,2015,42(2):229-232.
[15]吴克柳,李相方,石军太,等.水驱凝析气藏地层压力计算方法[J].石油学报,2012,33(2):278-283.WU Keliu,LI Xiangfang,SHI Juntai,et al.A computational method for reservoir of water-drive condensate gas reservoir[J].Acta Petrolei Sinica,2012,33(2):278-283.
[16]张继成,高艳,宋考平.利用产量数据计算封闭气藏地层压力的方法[J].大庆石油学院学报,2007,31(1):35-37.ZHANG Jicheng,GAO Yan,Song Kaoping.A method for predicting formation pressure using production data for confined gas reservoir[J].Journal of Daqing Petroleum Institute,2007,31(1):35-37.
[17]曲皓.裂缝性油藏线性流地层压力计算方法[J].特种油气藏,2015,22(4):104-106.QU Hao.Calculation method of formation pressure in fractured reservoir featured by linear flow[J].Special Oil and Gas Reservoirs,2015,22(4):104-106.
[18]杨永庆.基于流动物质平衡原理计算气藏平均地层压力[J].断块油气田,2015,22(6):747-751.YANG Yongqing.Calculation of average reservoir pressure by using modified flowing material balance[J].FaultBlock Oil&Gas Field,2015,22(6):747-751.
[19]王焰东,陈明强,曹宝格,等.一种求解定容封闭气藏任意时刻地层压力的实用方法[J].西安石油大学学报,2008,23(5):40-42.WANG Yandong,CHEN Mingqiang,CAO Baoge,et al.Practical method for solving the formation pressure of a closed constant-volume gas reservoir at any time[J].Journal of Xi'an Shiyou University,2008,23(5):40-42.
[20]李传亮.油藏工程原理[M].北京:石油工业出版社,2005:133-139.
[2]李发印,魏南宁,赵晓凯.衰减型油井压力恢复曲线的应用[J].新疆石油地质,2001,22(3):251-252.LI Fayin,WEI Nanning,ZHAO Xiaokai.Application of pressure-build-up curves in attenuation wells[J].Xinjiang Petroleum Geology,2001,22(3):251-252.
[3]李发印.油井地层压力与驱动半径计算新方法[J].石油勘探与开发,1992,19(6):90-93.LI Fayin.A new method of estimating reservoir pressure around a producer and the drainage radius[J].Petroleum Exploration and Development,1992,19(6):90-93.
[4]刘志军,许黎明,黄有根,等.低渗透气井短期关井计算地层压力[J].科学技术与工程,2015,15(6):159-169.LIU Zhijun,XU Liming,HUANG Yougen,et al.Calculating formation pressure of low permeability gas well in short time shut-in[J].Science Technology and Engineering,2015,15(6):159-169.
[5]蒋益宛,顾宝江,严玉华,等.利用短期关井压力数据确定地层压力[J].石油钻采工艺,2002,24(2):55-56.JIANG Yiwan,GU Baojiang,YAN Yuhua,et al.Defining formation pressure in short-term closed-in pressure parameter[J].Oil Drilling&Production Technology,2002,24(2):55-56.
[6]陈进娥,何顺利,门成全,等.靖边气田地层压力评价方法适用性研究[J].油气藏评价与开发,2013,3(1):27-30.CHEN Jine,HE Shunli,MEN Chengquan,et al.Applicability research of formation pressure evaluation method in Jingbian gas field[J].Reservoir Evaluation and Development,2013,3(1):27-30.
[7]杨玲,文彩霞,董悦.低渗透气藏气井平均地层压力简便计算方法[J].西安石油大学学报,2013,28(5):80-88.YANG Ling,WEN Caixia,DONG Yue.A simplified calculation method for average formation pressure of gas well in low-permeability gas reservoir[J].Journal of Xi'an Shiyou University,2013,28(5):80-88.
[8]张娟.临南洼陷现今地层压力系统解析[J].工程地球物理学报,2018,15(3):276-283.ZHANG Juan.The analysis of current formation pressure system in Linnan Sag[J].Chinese Journal of Engineering Geophysics,2018,15(3):276-283.
[9]孟令强,黄炳光,孟琦,等.利用生产数据确定低渗气藏单井合理产量[J].断块油气田,2014,21(4):467-471.MENG Lingqiang,HUANG Bingguang,MENG Qi,et al.Using production data to determine reasonable production rate of single well in low permeability gas reservoir[J].Fault-Block Oil&Gas Field,2014,21(4):467-471.
[10]张智峰,张洪,郑宏吉,等.运用IPR曲线求解地层压力方法研究[J].油气井测试,2004,13(3):5-6.ZHANG Zhifeng,ZHANG Hong,ZHENG Hongji,et al.A study for calculating formation pressure using IPRcurves[J].Well Testing,2004,13(3):5-6.
[11]李斌,郭长源.运用IPR曲线求解地层压力[J].石油学报,1994,15(2):89-98.LI Bin,GUO Changyuan.Estimation of reservoir pressure by using IPR curve[J].Acta Petrolei Sinica,1994,15(2):89-98.
[12]张广东,刘建仪,宋阳,等.油井采油指数及地层压力计算新方法[J].油气井测试,2006,15(3):9-14.ZHANG Guangdong,LIU Jianyi,SONG Yang,et al.Amethod of determining productive index and reservoir pressure of oil well[J].Well Testing,2006,15(3):9-14.
[13]王爽.葡萄花油田压力系统评价方法研究---以葡北地区为例[J].石油化工高等学校学报,2018,31(4):94-100.WANG Shuang.Evaluation method of pressure system in Putaohua Oilfield:A case study in the north of Pubei area[J].Journal of Petrochemical Universities,2018,31(4):94-100.
[14]DARYASAFAR A,AMAREH I,FATHI N M,等.基于瞬时产量递减分析确定天然裂缝性油藏平均地层压力[J].石油勘探与开发,2015,42(2):229-232.DARYASAFAR A,AMAREH I,FATHI N M,et al.Application of the transient rate decline analysis for determining average reservoir pressure in naturally fractured reservoirs[J].Petroleum Exploration and Development,2015,42(2):229-232.
[15]吴克柳,李相方,石军太,等.水驱凝析气藏地层压力计算方法[J].石油学报,2012,33(2):278-283.WU Keliu,LI Xiangfang,SHI Juntai,et al.A computational method for reservoir of water-drive condensate gas reservoir[J].Acta Petrolei Sinica,2012,33(2):278-283.
[16]张继成,高艳,宋考平.利用产量数据计算封闭气藏地层压力的方法[J].大庆石油学院学报,2007,31(1):35-37.ZHANG Jicheng,GAO Yan,Song Kaoping.A method for predicting formation pressure using production data for confined gas reservoir[J].Journal of Daqing Petroleum Institute,2007,31(1):35-37.
[17]曲皓.裂缝性油藏线性流地层压力计算方法[J].特种油气藏,2015,22(4):104-106.QU Hao.Calculation method of formation pressure in fractured reservoir featured by linear flow[J].Special Oil and Gas Reservoirs,2015,22(4):104-106.
[18]杨永庆.基于流动物质平衡原理计算气藏平均地层压力[J].断块油气田,2015,22(6):747-751.YANG Yongqing.Calculation of average reservoir pressure by using modified flowing material balance[J].FaultBlock Oil&Gas Field,2015,22(6):747-751.
[19]王焰东,陈明强,曹宝格,等.一种求解定容封闭气藏任意时刻地层压力的实用方法[J].西安石油大学学报,2008,23(5):40-42.WANG Yandong,CHEN Mingqiang,CAO Baoge,et al.Practical method for solving the formation pressure of a closed constant-volume gas reservoir at any time[J].Journal of Xi'an Shiyou University,2008,23(5):40-42.
[20]李传亮.油藏工程原理[M].北京:石油工业出版社,2005:133-139.
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