渤海油田科学探索井地层压力预测技术
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摘要
在油气钻探过程中,地层压力预测是一项十分关键的基础工作,特别是对于科学探索井,精确的地层压力预测能够为钻井液密度选择、钻井参数优化和井身结构设计提供科学依据。基于渤海某科学探索井的地震资料,以及周边区块已钻井的地质、地震、钻井、测井、测试等资料分析,得出了科学探索井地层孔隙压力、破裂压力、坍塌压力及漏失压力剖面,建立了合理的钻井液安全密度窗口。现场应用结果表明,该地层压力预测结果具有很高的预测精度,很好地指导了该科学探索井的钻完井施工,取得了良好的应用效果。
In the process of oil and gas drilling,formation pressure prediction is a very key basic work,especially for scientific exploration wells.The accurate prediction of formation pressure is of great importance to decide the drilling fluid density,optimize the drilling parameters,as well as design the most appropriate wellbore structure.According to the seismic data and the other data of geological exploration,well testing,well logging from the drilled wells in Bohai Oilfield,the formation information are obtained, including pore pressure,fracture pressure and collapse pressure.The safety window of reasonable drilling fluid is determined.The estimated formation pressure has been tested in real testing and it turns out with a high accuracy,which effectively guides the drilling and completion work with a good application effect.
In the process of oil and gas drilling,formation pressure prediction is a very key basic work,especially for scientific exploration wells.The accurate prediction of formation pressure is of great importance to decide the drilling fluid density,optimize the drilling parameters,as well as design the most appropriate wellbore structure.According to the seismic data and the other data of geological exploration,well testing,well logging from the drilled wells in Bohai Oilfield,the formation information are obtained, including pore pressure,fracture pressure and collapse pressure.The safety window of reasonable drilling fluid is determined.The estimated formation pressure has been tested in real testing and it turns out with a high accuracy,which effectively guides the drilling and completion work with a good application effect.
引文
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[5]王英民,夏广胜,雷振宇,等.基于地震速度谱的深水区地层压力预测[J].油气地球物理,2011,9(1):15-19. Wang Yingmin,Xia Guangsheng,Lei Zhenyu,et al.Formation pressure prediction in the deep-water area based on seismic velocity spectrum[J].Petroleum Geophysics,2011,9(1):15-19.
[6]禹荣,曾喜生,许庆国.地层异常压力的定量评价方法[J].断块油气田,2001,8(3):25-27. Yu Rong,Zeng Xisheng,Xu Qingguo.Quantitative evaluation of abnormal formation pressure[J].Fault-Block Oil & Gas Field, 2001,8(3):25-27.
[7]冯福平,李召兵,刘小明.基于岩石力学理论的测井地层压力预测[J].石油地质与工程,2009,23(3):101-103. Feng Fuping,Li Zhaobing,Liu Xiaoming.Prediction of logging formation pressure with rock mechanics[J].Petroleum and Engineering,2009,23(3):101-103.
[2]苏义脑.科学探索井地层压力计算[J].石油学报,2001,22(1):78-85. Su Yinao.Calculation of formation pressure of scientific exploration well[J].Acta Petrolei Sinica,2001,22(1):78-85.
[3]黄荣樽.一种新的地层破裂压力预测方法[J].石油钻采工艺,1986,3 (1):1-13. Huang Rongzun.A new method of forecast in fracture pressure[J]. Oil Drilling & Production Technology,1986,3(1):1-13.
[4]杨进,李嗣贵,胥志雄.异常高压井中地层压力监测方法应用研究[J].岩石力学与工程学报,2002,21(增刊1):2073-2075. Yang Jin,Li Sigui,Xu Zhixiong.Abnormal high pressure wells application study of formation pressure monitoring method[J].Chinese Journal of Rock Mechanics and Engineering,2002,21(Suppl.1): 2073-2075.
[5]王英民,夏广胜,雷振宇,等.基于地震速度谱的深水区地层压力预测[J].油气地球物理,2011,9(1):15-19. Wang Yingmin,Xia Guangsheng,Lei Zhenyu,et al.Formation pressure prediction in the deep-water area based on seismic velocity spectrum[J].Petroleum Geophysics,2011,9(1):15-19.
[6]禹荣,曾喜生,许庆国.地层异常压力的定量评价方法[J].断块油气田,2001,8(3):25-27. Yu Rong,Zeng Xisheng,Xu Qingguo.Quantitative evaluation of abnormal formation pressure[J].Fault-Block Oil & Gas Field, 2001,8(3):25-27.
[7]冯福平,李召兵,刘小明.基于岩石力学理论的测井地层压力预测[J].石油地质与工程,2009,23(3):101-103. Feng Fuping,Li Zhaobing,Liu Xiaoming.Prediction of logging formation pressure with rock mechanics[J].Petroleum and Engineering,2009,23(3):101-103.
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