延安气田Y井区稳产时间研究
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摘要
延安气田Y井区属于典型的低渗气藏,目前处于稳产阶段,准确预测气井和气藏的稳产时间对Y井区具有重要意义。根据Y井区的实际情况,采用产量不稳定分析法预测了气井的稳产时间,结果显示Y井区85.33%的气井稳产时间分布在3～7年,单井的稳产时间平均为5.6年。在三维地质建模的基础上,利用数值模拟方法预测不同采气速度下的气田稳产时间,结合实际采气速度,预测Y井区的稳产时间为5.5年;与周边地质条件相似气田的稳产时间对比,结果显示采用数值模拟预测得到的Y井区稳产时间结果可靠,为延安气田中后期的稳定开发和措施调整提供了理论支撑。
Y wellblock belongs to a typical low permeability gas reservoir.Now Y wellblock is going into stable development stage.Accurate prediction of gas well and gas reservoir production stable time on Y wellblock would be significant.The results by yield instability analysis showed that 85.33%of the gas wells in Y wellblock have a stable production time of 3～7 years.The average stable production period of single wells is 5.6 years.On the basis of three-dimensional geological modeling,a numerical simulation method was used to predict the stable production time of gas fields under different gas producting rates.The stable production time of Y wellblock is estimated to be5.5 years with actual gas producting rate.Compared with the stable production time of surrounding gas fields in the similar geological conditions,the results showed that the stable yield time of Y well region obtained by numerical simulation prediction is reliable.It provides theoretical support for the stable development and adjustment in the middle and late stage of Yan'an gas field.
Y wellblock belongs to a typical low permeability gas reservoir.Now Y wellblock is going into stable development stage.Accurate prediction of gas well and gas reservoir production stable time on Y wellblock would be significant.The results by yield instability analysis showed that 85.33%of the gas wells in Y wellblock have a stable production time of 3～7 years.The average stable production period of single wells is 5.6 years.On the basis of three-dimensional geological modeling,a numerical simulation method was used to predict the stable production time of gas fields under different gas producting rates.The stable production time of Y wellblock is estimated to be5.5 years with actual gas producting rate.Compared with the stable production time of surrounding gas fields in the similar geological conditions,the results showed that the stable yield time of Y well region obtained by numerical simulation prediction is reliable.It provides theoretical support for the stable development and adjustment in the middle and late stage of Yan'an gas field.
引文
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[3]陈雅晖,屈红军,魏新善,等.鄂尔多斯盆地东部山2段成岩相发育规律及其对物性的影响[J].非常规油气,2014,1(3):18-24.
[4]银晓,曹跃,高胜利,等.鄂尔多斯盆地东南部上古生界过剩压力与气藏关系研究[J].非常规油气,2017,4(4):34-40.
[5]任婷,漆万珍,曹红霞,等.鄂尔多斯盆地延长东区上古生界储层“四性”关系研究[J].非常规油气,2015,2(6):22-30.
[6]陈江萌,文开丰,王德龙,等.低渗气藏中后期稳产能力分析[J].石油化工应用,2013,32(9):52-55.
[7]孙建峰,乔向阳,马强.鄂尔多斯盆地延145井区储层孔喉结构及影响因素[J].四川地质学报,2017,37(1):87-90,95.
[8]SCHILTHUIS R J.“Active Oil and Reservoir Energy”Trans[J].RIME,1936,118:33.
[9]黄全华,王富平,尹琅,等.低渗气藏气井产能与动态储量计算方法[M].北京:石油工业出版社,2012:177-122.
[10]孙贺东.油气井现代产量递减分析方法及应用[M].北京:石油工业出版社,2013:21-90.
[11]冉新权,李安琪.苏里格气田开发论[M].北京:石油工业出版社,2013:101-135.
[12]王凤娇,刘义坤,于苏浩.苏里格气田东区致密砂岩储层特征[J].油气地质与采收率,2017,24(6):43-47,53.
[13]胡鑫,丁晓琪,朱颖.苏里格西盒8段致密砂岩储层孔隙结构特征[J].西安石油大学学报(自然科学版),2017,32(5):29-35.
[14]周通,刘森,张春雨,等.苏里格气田苏西区块上古生界天然气储层特征[J].地下水,2016,38(6):155-156.
[15]郑军.大牛地老区低渗致密多层叠合砂岩气藏稳产技术对策研究[D].成都:成都理工大学,2011:9-23.
[16]王代国.致密岩性气藏储量评价和计算方法问题与对策:以鄂尔多斯盆地大牛地气田上古生界气藏为例[J].石油实验地质,2012,34(5):495-498,505.
[17]侯瑞云,刘忠群.鄂尔多斯盆地大牛地气田致密低渗储层评价与开发对策[J].石油与天然气地质,2012,33(1):118-128.