大庆油田水平缝重复压裂改造技术
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摘要
针对大庆油田长垣人工裂缝为水平缝的重复压裂井,以葡萄花油田为研究对象,初步界定了重复压裂选井选层工艺方法;应用试井分析和流动指数方法判断重复压裂时机;经过研究找出了重复压裂井裂缝失效的主要原因。根据裂缝失效的原因,确定了增大施工规模、酸洗裂缝以及多裂缝、开新缝压裂等项改造措施。结合理论研究在葡萄花油田现场试验,取得较好效果。
Considering the artificial fracture as the refracture upon the horizontal seam,Putaohua oilfield is taken as the target and the following tasks have be done: define well and stratum selection method for refracturing;determine the refracturing time with well test analysis and flow index method;find out the main cause of refracturing failure.Based on the cause of refracturing failure,operation scale improvement and adjusted treatments are adopted,such as acid washing fracture,multi-fracture fracturing and new fracture fracturing.Combined with the theoretical research,Putaohua oilfield pilot test is proved successful.
Considering the artificial fracture as the refracture upon the horizontal seam,Putaohua oilfield is taken as the target and the following tasks have be done: define well and stratum selection method for refracturing;determine the refracturing time with well test analysis and flow index method;find out the main cause of refracturing failure.Based on the cause of refracturing failure,operation scale improvement and adjusted treatments are adopted,such as acid washing fracture,multi-fracture fracturing and new fracture fracturing.Combined with the theoretical research,Putaohua oilfield pilot test is proved successful.
引文
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[2]范学平,李秀生,张士成.重复压裂发展与展望[J].世界石油工业,1999,6(8):38-41.
[3]王凤江,丁云宏,路勇.低渗油田重复压裂技术研究[J].石油勘探与开发,1999,26(1):71-73.
[4]陈光俊,张汉荣.水力压裂重定向的可能性和重要性[J].勘探地球物理进展,2002,25(1).
[5]陈伟,段永刚.水平裂缝压裂井试井分析[J].油气井测试,2000,9(3):47-50.
[6]张山,刘清林,赵群,等.微地震监测技术在油田开发中的应用[J].石油物探,2002,41(2).
[7]胡永全,赵金州,蒲万芬.堵老缝压新缝重复压裂技术[J].西南石油学院学报,2000,22(3).
[8]WR IGHT C A,CONNAT R A.Reorientation of propped refracturetreatm ents[R].SPE28078.
[9]ELBEL J L,MACK M G.Refracturing:Observations and Theories[R].SPE25464.
[10]M ICHAEL P CLEARY.Analysis of m echam ism s and procedures forproducing favourab le shapes of hydrau lic fractures[R].SPE9260.
[11]SIEBR ITS E,ELBEL J L,WR IGHT C A.Refracture ReorientationGas Production in Barnett Shale Tight GasW ells[R].SPE63030.
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