高温超压地层随钻声波速度预测方法研究
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摘要
受高温超压条件的限制,莺歌海盆地深层探井钻探过程中往往缺少声波测井曲线,而随钻过程中声波速度预测对于高温超压井的顺利钻探非常关键。因此,研发一套适用于莺歌海盆地高温超压地层的随钻声波速度预测方法,首先分析了莺歌海盆地高温超压区地层岩石物理特征;随后,利用体积加权模型计算地层声波速度,并通过区分不同岩性拟合得到该区不同岩性的声波速度预测关系;最后将这两种方法应用于实际随钻深度预测中。结果显示,此文方法预测的声波速度精度高,能够准确预测钻头位置及后续储层深度,解决了莺歌海盆地高温超压带声波缺失的难题,同时保障了高温超压井的安全钻探及顺利完钻。
Due to the limitation of high temperature and overpressure conditions, the sonic logging curve is often lacking in the deep exploration well drilling process in Yinggehai Basin. However, the sonic velocity is very important for the successful exploration of high temperature and overpressure well while drilling. Thus, it is necessary to develop a sonic velocity prediction method that is suitable for this district. Firstly, the rock physics of this layer was analyzed.Then the volume weighting method was used to calculate the sonic velocity, and the fitting function of sonic velocity by differentiate the sand and shale was obtained by distinguishing different lithology fittings. Finally, the two methods are applied to predict the depth while drilling.It can accurately predict the broach location and the subsequent reservoir depth, and solve the problem of lacking of sonic log while drilling process in Yinggehai Basin. The method is to ensure the safe drilling and smooth drilling of high temperature and overpressure wells.
Due to the limitation of high temperature and overpressure conditions, the sonic logging curve is often lacking in the deep exploration well drilling process in Yinggehai Basin. However, the sonic velocity is very important for the successful exploration of high temperature and overpressure well while drilling. Thus, it is necessary to develop a sonic velocity prediction method that is suitable for this district. Firstly, the rock physics of this layer was analyzed.Then the volume weighting method was used to calculate the sonic velocity, and the fitting function of sonic velocity by differentiate the sand and shale was obtained by distinguishing different lithology fittings. Finally, the two methods are applied to predict the depth while drilling.It can accurately predict the broach location and the subsequent reservoir depth, and solve the problem of lacking of sonic log while drilling process in Yinggehai Basin. The method is to ensure the safe drilling and smooth drilling of high temperature and overpressure wells.
引文
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[11]姜传金,马学辉,周恩红.拟声波曲线构建的意义及应用[J].大庆石油地质与开发, 2004, 23(1):12-14
[12]于文芹,邓葆玲,周小鹰.岩性指示曲线重构及其在储层预测中的应用[J].石油物探, 2006, 45(5):482-486.
[13]林东成,张宏,贾建亮,等.声波曲线分层重构反演在岩性预测中的应用[J].大庆石油地质与开发, 2010, 29(4):167-170.
[14]刘卫国,宋宪生,郭长林,等.利用自然伽马测井数据计算地层泥质含量[J].铀矿地质, 2017, 33(1):45-48, 54.
[15]毛志强,谭廷栋.密度测井和中子测井的相关性及其在识别天然气层中的应用[J].地球物理学报, 1996, 39(1):125-133.
[2]李芳,邓勇,刘仕友,等.欠压实低速泥岩对地震反射及AVO的影响[J].地质科技情报, 2017, 36(5):244-248.
[3]袁全社,周家雄,李勇,等.声波测井曲线重构技术在储层预测中的应用[J].中国海上油气, 2009, 21(1):23-26.
[4]陈钢花,王永刚. Faust公式在声波曲线重构中的应用[J].勘探地球物理进展, 2005, 28(2):125-128.
[5]Gardner G H F, Gardner L W, Gregory A R. Formation Velocity and Density at the Diagnostic Basics for Stratigraphic Traps[J].Geophysics, 1974, 39(6):770-780.
[6]郭永恒.随钻测井曲线预测及更新方法研究[J].石油钻探技术, 2010, 38(6):25-28.
[7]贺懿,刘怀山,毛传龙,等.多曲线声波重构技术在储层预测中的应用研究[J].石油地球物理勘探, 2008, 43(5):549-556.
[8]龙国清,邓宏文,李玉君,等.基于模型正演的测井曲线重构技术在储层表征中的应用[J].油气地质与采收率, 2008, 15(1):66-68, 76.
[9]熊冉,高亮,杨姣,等.曲线重构反演在储层横向预测中的应用[J].西南石油大学学报(自然科学版), 2012, 34(1):83-89.
[10]杨少虎,黄玉生,彭文绪,等.声波重构技术在储层反演中的应用[J].石油地球物理勘探, 2006, 41(2):171-176.
[11]姜传金,马学辉,周恩红.拟声波曲线构建的意义及应用[J].大庆石油地质与开发, 2004, 23(1):12-14
[12]于文芹,邓葆玲,周小鹰.岩性指示曲线重构及其在储层预测中的应用[J].石油物探, 2006, 45(5):482-486.
[13]林东成,张宏,贾建亮,等.声波曲线分层重构反演在岩性预测中的应用[J].大庆石油地质与开发, 2010, 29(4):167-170.
[14]刘卫国,宋宪生,郭长林,等.利用自然伽马测井数据计算地层泥质含量[J].铀矿地质, 2017, 33(1):45-48, 54.
[15]毛志强,谭廷栋.密度测井和中子测井的相关性及其在识别天然气层中的应用[J].地球物理学报, 1996, 39(1):125-133.