汶川地震对普光气田开发影响分析
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摘要
汶川地震前后,普光气田出现套管非正常变形,而常规理论无法解释这一现象。通过地震活动性和地震载荷分析得出,汶川地震是普光气田套管变形的一个重要因素,地震载荷引起静态应力变化和动态载荷,造成断层滑动、层间变形不协调和盐膏层蠕变加剧,从而套管变形。该研究还得到几点启示,不但应力大小会影响套管变形,应力的变化同样具有重要影响。在地震活动区钻井,须重视构造应力变化的影响。
Well casings of Puguang Gas Field took place abnormal deformation before and after Wenchuan Earthquake,but the conventional theory was unable to explain it.By seismicity and seismic load analysis,it was concluded that Wenchuan Earthquake was an important factor to the deformation.Seismic load caused static stress change,dynamic load,fault slip,inconsistent deformation between stratums,salt/gypsum creep speedup and casing deformation.The analysis showed that not only the stress size affected the deformation,but also the stress change imposed important influence.Drilling in seismic area should pay attention to the effect of structural stress change.
Well casings of Puguang Gas Field took place abnormal deformation before and after Wenchuan Earthquake,but the conventional theory was unable to explain it.By seismicity and seismic load analysis,it was concluded that Wenchuan Earthquake was an important factor to the deformation.Seismic load caused static stress change,dynamic load,fault slip,inconsistent deformation between stratums,salt/gypsum creep speedup and casing deformation.The analysis showed that not only the stress size affected the deformation,but also the stress change imposed important influence.Drilling in seismic area should pay attention to the effect of structural stress change.
引文
[1]刘子晋.地震与油田工程的探讨[J].东北地震研究,1989,5(2):16-20
[2]宋胜利,王海涛,马海涛,等.中原油田盐膏蠕变规律研究及套管损坏预防措施[J].石油学报,2005,26(2):119-121
[3]Kunihiko Shimazaki,Takashi Nakata.Time-predictable recur-rence model for large earthquakes[J].Geophysical Research Let-ters,1980,7(4):279-282
[4]Hill D P.Dynamic stresses,coulomb failure,and remote trigge-ring[J].Bulletin of the Seismological Society of America,2008,98:66-92
[5]Rogers G,Dragert H.Episodic tremor and slip on the Cascadiasubduction zone:the chatter of silent slip[J].Science,2003,300:1942-1943
[6]刘子晋.天然地震与油田套管损坏关系的探讨[A].油田开发工程与地震减灾[C].北京:石油工业出版社,1991.264-267
[7]郑文涛,陈波.地震活动与煤矿灾害事故关系的思考[J].地学前缘,2003,10(02):366-366
[8]谢小建,张军强.地震活动与煤矿灾害事故关系研究[J].山西科技,2003,(4):13-16
[9]陈波,郑文涛,梁汉东,等.地震活动与煤矿瓦斯溢出事故之间的影响关系[J].煤炭学报,2005,30(4):447-450
[10]Maury V.Rock failure mechanisms identification:a key for well-bore stability and reservoir behavior problem[A].SPE/ISRM28049[C].1994
[2]宋胜利,王海涛,马海涛,等.中原油田盐膏蠕变规律研究及套管损坏预防措施[J].石油学报,2005,26(2):119-121
[3]Kunihiko Shimazaki,Takashi Nakata.Time-predictable recur-rence model for large earthquakes[J].Geophysical Research Let-ters,1980,7(4):279-282
[4]Hill D P.Dynamic stresses,coulomb failure,and remote trigge-ring[J].Bulletin of the Seismological Society of America,2008,98:66-92
[5]Rogers G,Dragert H.Episodic tremor and slip on the Cascadiasubduction zone:the chatter of silent slip[J].Science,2003,300:1942-1943
[6]刘子晋.天然地震与油田套管损坏关系的探讨[A].油田开发工程与地震减灾[C].北京:石油工业出版社,1991.264-267
[7]郑文涛,陈波.地震活动与煤矿灾害事故关系的思考[J].地学前缘,2003,10(02):366-366
[8]谢小建,张军强.地震活动与煤矿灾害事故关系研究[J].山西科技,2003,(4):13-16
[9]陈波,郑文涛,梁汉东,等.地震活动与煤矿瓦斯溢出事故之间的影响关系[J].煤炭学报,2005,30(4):447-450
[10]Maury V.Rock failure mechanisms identification:a key for well-bore stability and reservoir behavior problem[A].SPE/ISRM28049[C].1994
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