多层疏松砂岩气藏生产动态多因素影响研究——以S气田为例
|
摘要
针对疏松砂岩气藏生产动态的影响因素和影响规律不明确的问题,采用数值模拟研究了多重因素影响下S气田双层疏松砂岩气藏的生产动态特征,探讨了各因素的影响规律及给生产动态分析带来的问题。模拟表明:多层合采气井表现出层间自动转换接替的动态特征,早期由高渗层主导产气,晚期由低渗层主导产气。研究区内,当低-高渗层厚度比、井底压力或气井配产越大时,气井稳产期越短,低渗层主导产气越早,且主导性越强;压裂能弱化渗透率级差的影响,提高早期采气速度,适合S气田的增产改造;层间初始压差加剧高、低渗层早期的产量差异,有"倒灌"发生。层间非均质性是S气田开发的主要矛盾,需要权衡具体开发井的主控因素进行生产动态分析。
In order to make clear the factors influencing the production performance of unconsolidated sandstone gas reservoir and their influencing laws,the dynamic characteristics of double-layer unconsolidated sandstone gas reservoir in S gasfield are studied by numerical simulation,and the influencing laws of the factors on the production performance and the problems caused by the factors in the analysis of production performance are discussed. The simulation result displays that: the multi-layer commingling production gas wells show the production characteristic of the interlayer automatica replacement. In the early stage of production,the gas production was dominated by the high permeability layer,while in the late stage,the gas production was dominated by the low permeability layer. In the study area,when the thickness ratio of low to high permeability layer,the bottom-hole pressure or gas well production is high,the stable production period of gas well is short,the production period dominated by the low permeability layer is long,and the dominance of the low permeability layer is strong. Fracturing can weaken the influence of permeability grade difference and improve the early gas production rate,which is suitable for the S gasfield. The initial interlayer pressure difference increased the yield difference between high and low permeability layers,which will lead to " flowing backward". Interlayer heterogeneity is the main contradiction in the development of S gas field. It is necessary to weigh the main control factors in the production performance analysis of the specific development wells.
In order to make clear the factors influencing the production performance of unconsolidated sandstone gas reservoir and their influencing laws,the dynamic characteristics of double-layer unconsolidated sandstone gas reservoir in S gasfield are studied by numerical simulation,and the influencing laws of the factors on the production performance and the problems caused by the factors in the analysis of production performance are discussed. The simulation result displays that: the multi-layer commingling production gas wells show the production characteristic of the interlayer automatica replacement. In the early stage of production,the gas production was dominated by the high permeability layer,while in the late stage,the gas production was dominated by the low permeability layer. In the study area,when the thickness ratio of low to high permeability layer,the bottom-hole pressure or gas well production is high,the stable production period of gas well is short,the production period dominated by the low permeability layer is long,and the dominance of the low permeability layer is strong. Fracturing can weaken the influence of permeability grade difference and improve the early gas production rate,which is suitable for the S gasfield. The initial interlayer pressure difference increased the yield difference between high and low permeability layers,which will lead to " flowing backward". Interlayer heterogeneity is the main contradiction in the development of S gas field. It is necessary to weigh the main control factors in the production performance analysis of the specific development wells.
引文
[1]崔思华,朱华银,钟世敏.涩北气田储层应力敏感性及其对开发产能的影响[J].天然气地球科学,2008,19(1):141-144.CUI Sihua,ZHU Huayin,ZHONG Shimin.Reservoir properties variation characteristics stress sensitivity of Sebei gas field and its influence on gas field development[J].Natural Gas Geoscience,2008,19(1):141-144.
[2]钟兵,杨雅和,夏崇双,等.砂岩多层气藏多层合采合理配产方法研究[J].天然气工业,2005,25(s A):104-106.ZHONG Bing,YANG Yahe,XIA Chongshuang,et al.Proper production-allocating method of commingling production for sand gas reservoir with multiple pays[J].Natural Gas Industry,2005,25(s A):104-106.
[3]马翔宇.多层气藏试井分析[D].北京:中国地质大学(北京),2012.MA Xiangyu.Well Test Analysis of Multi-Layered Gas Reservoir[D].Beijing:China University of Geosciences,2012.
[4]万玉金,李江涛,杨炳秀.多层疏松砂岩气田开发[M].北京:石油工业出版社,2016.WAN Yujin,LI Jiangtao,YANG Bingxiu.Development of Multi-Layer Unconsolidated Sand Gas Reservoirs[M].Beijing:Petroleum Industry Press,2016.
[5]万玉金,孙贺东,黄伟岗,等.涩北气田多层气藏储量动用程度分析[J].天然气工业,2009,29(7):58-60.WAN Yujin,SUN Hedong,HUANG Weigang,et al.Reserves producing level analysis of multilayer gas reservoir in the Sebei gas filed[J].Natural Gas Industry,2009,29(7):58-60.
[6]孙贺东,钟世敏,万玉金,等.涩北气田多层合采优化配产及动态预测[J].天然气工业,2008,28(12):86-88.SUN Hedong,ZHONG Shimin,WAN Yujin,et al.Optimizing proration production and dynamic prediction for commingling production in the Sebei gasfield[J].Natural Gas Industry,2008,28(12):86-88.
[7]胡勇,李熙喆,万玉金,等.高低压双气层合采产气特征[J].天然气工业,2009,29(2):89-91.HU Yong,LI Xizhe,WAN Yujin,et al.Gas producing property of commingled production for high-low pressure double gas reservoir[J].Natural Gas Industry,2009,29(2):89-91.
[8]刘启国,王辉,王瑞成,等.多层气藏井分层产量贡献计算方法及影响因素[J].西南石油大学学报(自然科学版),2010,32(1):80-84.LIU Qiguo,WANG Hui,WANG Ruicheng,et al.A computing method for layered production contribution and affecting factors analyzing in commingled gas reservoirs[J].Journal of Southwest Petroleum University(Science&Technology Edition),2010,32(1):80-84.
[9]王晓冬,刘慈群.分层合采油井产能分析[J].石油钻采工艺,1999,21(2):56-61.WANG Xiaodong,LIU Ciqun.Productivity analysis on commingled production wells[J].Oil Drilling&Production Technology,1999,21(2):56-61.
[10]熊钰,张烈辉,阳仿勇,等.多层气藏一井多层开采技术界限研究[J].天然气工业,2005,25(7):81-83.XIONG Yu,ZHANG Liehui,YANG Fangyong,et al.Study on technical policy and threshold value of multiple-zone production with one well for multi-layered gas reservoir[J].Natural Gas Industry,2005,25(7):81-83.
[11]胡勇,朱华银,陈建军,等.高、低渗“串联”气层供气机理物理模拟研究[J].天然气地球科学,2007,18(3):469-472.HU Yong,ZHU Huayin,CHEN Jianjun,et al.Physical simulated study on the gas-supplying mechanism of highlow permeable serial-connection-formations[J].Natural Gas Geoscience,2007,18(3):469-472.
[12]朱华银,胡勇,李江涛,等.柴达木盆地涩北多层气藏合采物理模拟[J].石油学报,2013,34(s):136-142.ZHU Huayin,HU Yong,LI Jiangtao,et al.Physical simulation of commingled production for multilayer gas reservoir in Sebei gas field,Qaidam Basin[J].Acta Petrolei Sinica,2013,34(s):136-142.
[13]张望明,韩大匡,连淇祥,等.多层油藏试井分析[J].石油勘探与开发,2001,28(3):63-66.ZHANG Wangming,HAN Dakuang,LIAN Qixiang,et al.Well test in multi-layer reservoir[J].Petroleum Exploration and Development,2001,28(3):63-66.
[14]LOLON E P,BLASINGAME T A.New semi-analytical solutions for multilayer reservoirs[C].SPE 114946,2008.
[15]BOURDET D.Pressure behavior of layered reservoirs with crossflow[C].SPE 13628,1985.
[16]邓祺.涩北气田砂岩气藏试井分析应用研究[D].成都:西南石油大学,2014.DENG Qi.Application Research on the Well Test Analysis of Sebei Sand Gas Reservoir[D].Chengdu:Southwest Petroleum University,2014.
[17]吴宜禄.多层气藏压力动态特征及试井分析理论研究[D].成都:西南石油大学,2004.WU Yilu.Study on Pressure Behavior and Well Testing Analysis Theory of Stratified Gas Reservoir[D].Chengdu:Southwest Petroleum University,2004.
[2]钟兵,杨雅和,夏崇双,等.砂岩多层气藏多层合采合理配产方法研究[J].天然气工业,2005,25(s A):104-106.ZHONG Bing,YANG Yahe,XIA Chongshuang,et al.Proper production-allocating method of commingling production for sand gas reservoir with multiple pays[J].Natural Gas Industry,2005,25(s A):104-106.
[3]马翔宇.多层气藏试井分析[D].北京:中国地质大学(北京),2012.MA Xiangyu.Well Test Analysis of Multi-Layered Gas Reservoir[D].Beijing:China University of Geosciences,2012.
[4]万玉金,李江涛,杨炳秀.多层疏松砂岩气田开发[M].北京:石油工业出版社,2016.WAN Yujin,LI Jiangtao,YANG Bingxiu.Development of Multi-Layer Unconsolidated Sand Gas Reservoirs[M].Beijing:Petroleum Industry Press,2016.
[5]万玉金,孙贺东,黄伟岗,等.涩北气田多层气藏储量动用程度分析[J].天然气工业,2009,29(7):58-60.WAN Yujin,SUN Hedong,HUANG Weigang,et al.Reserves producing level analysis of multilayer gas reservoir in the Sebei gas filed[J].Natural Gas Industry,2009,29(7):58-60.
[6]孙贺东,钟世敏,万玉金,等.涩北气田多层合采优化配产及动态预测[J].天然气工业,2008,28(12):86-88.SUN Hedong,ZHONG Shimin,WAN Yujin,et al.Optimizing proration production and dynamic prediction for commingling production in the Sebei gasfield[J].Natural Gas Industry,2008,28(12):86-88.
[7]胡勇,李熙喆,万玉金,等.高低压双气层合采产气特征[J].天然气工业,2009,29(2):89-91.HU Yong,LI Xizhe,WAN Yujin,et al.Gas producing property of commingled production for high-low pressure double gas reservoir[J].Natural Gas Industry,2009,29(2):89-91.
[8]刘启国,王辉,王瑞成,等.多层气藏井分层产量贡献计算方法及影响因素[J].西南石油大学学报(自然科学版),2010,32(1):80-84.LIU Qiguo,WANG Hui,WANG Ruicheng,et al.A computing method for layered production contribution and affecting factors analyzing in commingled gas reservoirs[J].Journal of Southwest Petroleum University(Science&Technology Edition),2010,32(1):80-84.
[9]王晓冬,刘慈群.分层合采油井产能分析[J].石油钻采工艺,1999,21(2):56-61.WANG Xiaodong,LIU Ciqun.Productivity analysis on commingled production wells[J].Oil Drilling&Production Technology,1999,21(2):56-61.
[10]熊钰,张烈辉,阳仿勇,等.多层气藏一井多层开采技术界限研究[J].天然气工业,2005,25(7):81-83.XIONG Yu,ZHANG Liehui,YANG Fangyong,et al.Study on technical policy and threshold value of multiple-zone production with one well for multi-layered gas reservoir[J].Natural Gas Industry,2005,25(7):81-83.
[11]胡勇,朱华银,陈建军,等.高、低渗“串联”气层供气机理物理模拟研究[J].天然气地球科学,2007,18(3):469-472.HU Yong,ZHU Huayin,CHEN Jianjun,et al.Physical simulated study on the gas-supplying mechanism of highlow permeable serial-connection-formations[J].Natural Gas Geoscience,2007,18(3):469-472.
[12]朱华银,胡勇,李江涛,等.柴达木盆地涩北多层气藏合采物理模拟[J].石油学报,2013,34(s):136-142.ZHU Huayin,HU Yong,LI Jiangtao,et al.Physical simulation of commingled production for multilayer gas reservoir in Sebei gas field,Qaidam Basin[J].Acta Petrolei Sinica,2013,34(s):136-142.
[13]张望明,韩大匡,连淇祥,等.多层油藏试井分析[J].石油勘探与开发,2001,28(3):63-66.ZHANG Wangming,HAN Dakuang,LIAN Qixiang,et al.Well test in multi-layer reservoir[J].Petroleum Exploration and Development,2001,28(3):63-66.
[14]LOLON E P,BLASINGAME T A.New semi-analytical solutions for multilayer reservoirs[C].SPE 114946,2008.
[15]BOURDET D.Pressure behavior of layered reservoirs with crossflow[C].SPE 13628,1985.
[16]邓祺.涩北气田砂岩气藏试井分析应用研究[D].成都:西南石油大学,2014.DENG Qi.Application Research on the Well Test Analysis of Sebei Sand Gas Reservoir[D].Chengdu:Southwest Petroleum University,2014.
[17]吴宜禄.多层气藏压力动态特征及试井分析理论研究[D].成都:西南石油大学,2004.WU Yilu.Study on Pressure Behavior and Well Testing Analysis Theory of Stratified Gas Reservoir[D].Chengdu:Southwest Petroleum University,2004.