塔里木盆地山前复杂带钻井地层压力预测
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摘要
地层压力的准确预测是钻井井身结构、泥浆性能和钻井参数设计的直接依据,其对优质高效安全钻井,减少井下复杂情况,保护油气层、固井、完井等意义重大。由于地质、地震资料及认识的局限性,难以对塔里木盆地山前探井准确预测钻前地层压力,从而影响钻井工程顺利实施。首先在地震资料钻前压力预测的基础上,及时利用中途测井资料,修正压力预测模型,调整模型参数,然后重新标定过井地震资料,建立地震与测井信息之间的非线性映射关系,预测未钻地层岩石物理信息,进而预测得到地层孔隙压力、坍塌压力、破裂压力等,为下步钻进参数优化调整提供参考依据。
The correct prediction of formation pressure as dirrect basis of drilling well bore structure,mud quality and drilling parameter design is of great significance to high quality,efficient and safety drilling,reducing downhole complex problem,preserving oil-gas zones,well cementation and completion.The piedmont of Tarim basin was of limitations of geology,seismic data and related knowledges,so the correct prediction of pre-drilling formation pressure was difficult,and the proper drilling engineering implementation was affected.This paper presents the method for proper prediction of strata pore pressure,collapse pressure and fracture pressure by using the pre-drilling formation pressure,drillstem test,corrected pressure prediction model,model parameter modulation,re-calibrating well-corrosing seismic data,establishing non-linear mapping relation and undrilled strata petrophysical information prediction,etc.in order to provide support bases for parameter's optimization and regulation of next drilling process.
The correct prediction of formation pressure as dirrect basis of drilling well bore structure,mud quality and drilling parameter design is of great significance to high quality,efficient and safety drilling,reducing downhole complex problem,preserving oil-gas zones,well cementation and completion.The piedmont of Tarim basin was of limitations of geology,seismic data and related knowledges,so the correct prediction of pre-drilling formation pressure was difficult,and the proper drilling engineering implementation was affected.This paper presents the method for proper prediction of strata pore pressure,collapse pressure and fracture pressure by using the pre-drilling formation pressure,drillstem test,corrected pressure prediction model,model parameter modulation,re-calibrating well-corrosing seismic data,establishing non-linear mapping relation and undrilled strata petrophysical information prediction,etc.in order to provide support bases for parameter's optimization and regulation of next drilling process.
引文
[1]周新源,罗金海,王清华.塔里木盆地南缘冲断带构造特征及其油气地质特征[J].中国科学(D辑),2004,34(S1):56-62.
[2]孙龙德.塔里木盆地库车坳陷与塔西南坳陷早白垩世沉积相与油气勘探[J].古地理学报,2004,6(5):252-260.
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[4]张明振,印兴耀,谭明友,等.对测井约束地震波阻抗反演的理解与应用[J].石油地球物理勘探,2007,42(6):699-702.
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[6]慈建发,何世明,李荣,等.钻前井壁力学稳定性研究[J].天然气工业,2006,26(6):68-71.
[7]吴超,陈勉,金衍.利用地震反演技术钻前预测井壁稳定性[J].石油钻采工艺,2006,28(2):18-20.
[8]刘向君,罗平亚.石油测井与井壁稳定性[M].北京:石油工业出版社,1999.
[9]樊洪海,张传进.复杂地层地层孔隙压力求取新技术[J].石油钻探技术,2005,33(5):40-43.
[10]郭桂生,蔺敬旗,张仲华,等.利用测井资料预测孔隙压力、破裂压力和坝塌压力[J].新疆石油地质,2011,32(2):187-189.
[2]孙龙德.塔里木盆地库车坳陷与塔西南坳陷早白垩世沉积相与油气勘探[J].古地理学报,2004,6(5):252-260.
[3]杨进,高德利.地层压力随钻监测和预测技术研究[J].石油大学学报,1999,23(1):35-37.
[4]张明振,印兴耀,谭明友,等.对测井约束地震波阻抗反演的理解与应用[J].石油地球物理勘探,2007,42(6):699-702.
[5]金衍,陈勉.利用地震记录钻前预测井壁稳定性研究[J].石油学报,2004,25(1):89-92.
[6]慈建发,何世明,李荣,等.钻前井壁力学稳定性研究[J].天然气工业,2006,26(6):68-71.
[7]吴超,陈勉,金衍.利用地震反演技术钻前预测井壁稳定性[J].石油钻采工艺,2006,28(2):18-20.
[8]刘向君,罗平亚.石油测井与井壁稳定性[M].北京:石油工业出版社,1999.
[9]樊洪海,张传进.复杂地层地层孔隙压力求取新技术[J].石油钻探技术,2005,33(5):40-43.
[10]郭桂生,蔺敬旗,张仲华,等.利用测井资料预测孔隙压力、破裂压力和坝塌压力[J].新疆石油地质,2011,32(2):187-189.
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