基于储层潜力的水平井分段酸压设计优化与应用
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摘要
为了明确影响四川盆地震旦系碳酸盐岩储层水平井改造效果的关键因素,同时建立一套适合本区的强非均质储层水平井分段酸压方法,采用信息量和灰关联分析手段,对30口气井地震、成像和岩心等资料进行了评价,基于评价结果开展了设计优化相关研究。结果表明,地震资料反应出的缝洞发育情况对震旦系气井产量影响最大,其次为成像测井资料、岩心资料和钻录井显示资料,构造背景因素影响最低。基于上述认识,震旦系储层水平井可主要依据地震资料建立分段酸压优化方法,将地震剖面与井眼轨迹叠合,实现水平井合理分段,确定各段改造目标和选择每段工艺及参数。现场应用表明,相比于前期同类改造井,压后测试产量提高2～3倍,为同类型储层改造提供了有效的手段。
In order to identify the key factors affecting acidfracturing performance in the carbonate reservoir in Sinian formation of Sichuan Basin and to establish a suitable staged acid-fracturing method for horizontal wells in highly heterogenous reservoirs,the information amount theory and gray correlative method were used to evaluate the seismic data,images and cores of thirty gas wells. The results show that the fracture-cavity development information reflected by seismic data is the most important influence factor for gas well production in Sinian formation,then the imaging logging data,the core data,the drilling/logging data,and the structural setting. So the staged acid-fracturing optimization method can be built mainly based on seismic data. The composite of seismic profiles and borehole trajectory can help to divide horizontal section reasonably and to determine the stimulation goal of each section,also help to decide the technology and parameters. Field application shows that the gas production after acid-fracturing was 2 ～ 3 times the production of previous wells in similar formation. It provides an effective way for the stimulation of same type reservoir.
In order to identify the key factors affecting acidfracturing performance in the carbonate reservoir in Sinian formation of Sichuan Basin and to establish a suitable staged acid-fracturing method for horizontal wells in highly heterogenous reservoirs,the information amount theory and gray correlative method were used to evaluate the seismic data,images and cores of thirty gas wells. The results show that the fracture-cavity development information reflected by seismic data is the most important influence factor for gas well production in Sinian formation,then the imaging logging data,the core data,the drilling/logging data,and the structural setting. So the staged acid-fracturing optimization method can be built mainly based on seismic data. The composite of seismic profiles and borehole trajectory can help to divide horizontal section reasonably and to determine the stimulation goal of each section,also help to decide the technology and parameters. Field application shows that the gas production after acid-fracturing was 2 ～ 3 times the production of previous wells in similar formation. It provides an effective way for the stimulation of same type reservoir.
引文
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[16]王琨,詹立,苟波.高温致密碳酸盐岩与胶凝酸酸岩反应速率测试方法研究[J].钻采工艺,2018,41(3):41-44.
[17]侯帆,许艳艳,张艾,等.超深高温碳酸盐岩自生酸深穿透酸压工艺研究与应用[J].钻采工艺,2018,41(1):35-37.
[2]杨威,魏国齐,赵蓉蓉,等.四川盆地震旦系灯影组岩溶储层特征及展布[J].天然气工业,2014,34(3):55-60.
[3]蔡承政,李根生,沈忠厚,等.水平井分段酸化酸压技术现状及展望[J].钻采工艺,2013,36(2):48-51.
[4]何春明,胡峰,刘哲.深层海相碳酸盐岩储层水平井分段酸压技术研究[J].油气井测试,2013,22(5):5-9.
[5]Che M G,Zhang F X,Wang Y H.Openhole multistage acid-fracturing increases hydrocarbon production in deep naturally fractured carbonate horizontal wells in Ta-zhong gasfield of Tarim Basin,West China[J].SPE 176334,2015.
[6]肖晖,郭建春.缝洞型碳酸盐岩储层水平井分段酸压技术研究[J].断块油气田,2011,18(1):119-122.
[7]叶颉枭,赵立强,刘平礼.基于层次分析和折衷模糊决策的压裂酸化井层优选法[J].重庆科技学院学报(自然科学版),2013,15(4):81-84.
[8]王佩珊.碳酸盐岩储层水平井基质酸化模式优化研究[D].西南石油大学硕士论文,2014.
[9]梁涛,常毓文.巴肯致密油藏单井产能参数影响程度排序[J].石油勘探与开发,2013,40(3):357-362.
[10]邹东璃.T油田碳酸盐岩储层水平井分段酸压效果评价[D].西南石油大学硕士论文,2014.
[11]温杰文.川西地区高温超高压超深井安全试油井下作业技术研究[J].钻采工艺,2018,41(6):57-60.
[12]张佳,杨辉,刘练,等.穿长泥岩段侧钻井酸压完井工艺优化[J].钻采工艺,2018,41(3):55-57.
[13]杜勇.碳酸盐岩油藏定点射流深度均衡酸压工艺研究及应用[J].钻采工艺,2018,41(3):48-51.
[14]田东江,罗志锋,牛新年,等.复杂碳酸盐岩储层酸压沟通模式识别新方法与应用[J].钻采工艺,2017,40(3):62-64.
[15]王洋,袁清芸,周臖.不同类型酸液指进可视化研究及应用[J].钻采工艺,2017,40(4):50-52.
[16]王琨,詹立,苟波.高温致密碳酸盐岩与胶凝酸酸岩反应速率测试方法研究[J].钻采工艺,2018,41(3):41-44.
[17]侯帆,许艳艳,张艾,等.超深高温碳酸盐岩自生酸深穿透酸压工艺研究与应用[J].钻采工艺,2018,41(1):35-37.