复杂构造页岩气井压裂影响因素及工艺优化研究
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摘要
在川东南地区页岩气储层压裂实践中发现,处于复杂构造环境的气井压裂施工难度大、改造效果不理想。为了分析认识复杂构造环境中影响压裂施工的原因,提高施工成功率和改造效果,利用压裂曲线、参数、产气剖面测试数据、微地震监测结果等资料,对影响压裂改造的因素和影响机理进行深入研究,并对工艺参数优化提出了针对性措施。现场应用取得较好效果,裂缝延伸均匀性明显增强,压后产量大幅提升。为同类型页岩气储层改造效果的提升做出了积极的尝试。
In the fracturing practice of shale gas reservoir in southeastern Sichuan, it is found that the fracturing operation of gas wells in complex tectonic zone is very difficult and the reconstruction effect is not ideal. In order to analyze and recognize the causes that affect fracturing operation in complex tectonic zone, and improve the success rate of construction and the effect of fracturing reconstruction, we use the data of fracturing curve, parameters, gas production profile test data and microseismic monitoring results to study the factors and influencing mechanism of affecting facturing reconstruction in depth, and put forward some pertinent measures for optimizing technological parameters. Good results have been achieved in field application, because the uniformity of fracture extension has been enhanced obviously, and the output has been greatly increased after pressing. It has made a positive attempt to improve the effect of shale gas reservoir reconstruction of the same type.
In the fracturing practice of shale gas reservoir in southeastern Sichuan, it is found that the fracturing operation of gas wells in complex tectonic zone is very difficult and the reconstruction effect is not ideal. In order to analyze and recognize the causes that affect fracturing operation in complex tectonic zone, and improve the success rate of construction and the effect of fracturing reconstruction, we use the data of fracturing curve, parameters, gas production profile test data and microseismic monitoring results to study the factors and influencing mechanism of affecting facturing reconstruction in depth, and put forward some pertinent measures for optimizing technological parameters. Good results have been achieved in field application, because the uniformity of fracture extension has been enhanced obviously, and the output has been greatly increased after pressing. It has made a positive attempt to improve the effect of shale gas reservoir reconstruction of the same type.
引文
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[8]程万,金衍,陈勉,等.三维空间中水力裂缝穿透天然裂缝的判别准则[J].石油勘探与开发, 2014,41(3):336-340.
[9]曾义金,陈作,卞晓冰.川东南深层页岩气分段压裂技术的突破与认识[J].天然气工业, 2016,36(1):61-67.
[10]张骞,黄冬梅,李正健,唐慧敏,唐宇.压裂缝参数对页岩气藏水平井累产影响分析[J].海洋石油, 2017(02):42-44.
[2]周德华,焦方正,贾长贵,等.JY1HF页岩气水平井大型分段压裂技术[J].石油钻探技术, 2014, 42(1):75-80.
[3]王志刚.涪陵焦石坝地区页岩气水平井压裂改造实践与认识[J].石油与天然气地质, 2014,35(3):425-430.
[4]苟波,郭建春.基于精细地质模型的大型压裂裂缝参数优化[J].石油与天然气地质, 2013, 34(6):809-815.
[5]赵金洲,任岚,胡永全.页岩储层压裂缝成网延伸的受控因素分析[J].西南石油大学学报(自然科学版),2013,35(1):1-9.
[6]陈勉.页岩气储层水力裂缝转向扩展机制[J].中国石油大学学报(自然科学版),2013, 37(5):88-94.
[7]郭建春,尹建,赵志红.裂缝干扰下页岩储层压裂形成复杂裂缝可行性[J].岩石力学与工程学报, 2014,33(8):1589-1596.
[8]程万,金衍,陈勉,等.三维空间中水力裂缝穿透天然裂缝的判别准则[J].石油勘探与开发, 2014,41(3):336-340.
[9]曾义金,陈作,卞晓冰.川东南深层页岩气分段压裂技术的突破与认识[J].天然气工业, 2016,36(1):61-67.
[10]张骞,黄冬梅,李正健,唐慧敏,唐宇.压裂缝参数对页岩气藏水平井累产影响分析[J].海洋石油, 2017(02):42-44.