测井地震联合建模方法在地质导向前导模型中的应用
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摘要
在地质导向钻前建模过程时,通常利用水平井附近的多口邻井确定钻遇地层的深度及方位,该层的井间横向构造起伏可以利用解释层位来控制趋势;当井眼处测井解释的深度与解释的地震层位深度有差异时,建立的前导模型将有很大的误差。此文采用测井地震联合建模的方法来控制误差范围。该方法首先利用测井解释结果对大套的地震解释层位进行校正,根据每口井解释的小层厚度,利用滑动平均算法构造小层等厚体数据,然后利用校正后的地震解释层位横向约束控制地层起伏,建立每一地质小层的构造图,以此提高地质导向水平井着陆精度。实际资料验证,该方法会大大减小误差,能把模型误差控制在2m的范围内。
In the process of pre-drilling geo-steering modeling,the wells near the horizontal well are used to determine the depth and azimuth of layers to be penetrated.The horizontal structural relief among wells is controlled by the seismic interpretation layer. If there are difference between the depth of seismic interpretation layer and the depth of log interpretation in the well location,predrilling geo-steering model will has great inaccuracy.In order to control the error range,the log and seismic combined ways were used in this paper.Firstly,calibrate the seismic interpretation horizons with log interpretation results.Then according to the subzone depth interpretated in the well,calculate the isopachous body data of subzone using moving average algorithm.Finally,control the horizontal structural relief with the calibrated seismic horizons,and compile the structural map for every geologic subzone to guide the work of geo-steering and improve the accuracy of the horizontal well.This method can control the inaccuracy rang within 2 m by verification with actual data.
In the process of pre-drilling geo-steering modeling,the wells near the horizontal well are used to determine the depth and azimuth of layers to be penetrated.The horizontal structural relief among wells is controlled by the seismic interpretation layer. If there are difference between the depth of seismic interpretation layer and the depth of log interpretation in the well location,predrilling geo-steering model will has great inaccuracy.In order to control the error range,the log and seismic combined ways were used in this paper.Firstly,calibrate the seismic interpretation horizons with log interpretation results.Then according to the subzone depth interpretated in the well,calculate the isopachous body data of subzone using moving average algorithm.Finally,control the horizontal structural relief with the calibrated seismic horizons,and compile the structural map for every geologic subzone to guide the work of geo-steering and improve the accuracy of the horizontal well.This method can control the inaccuracy rang within 2 m by verification with actual data.
引文
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[12]伊向艺.石油钻采工程[M].成都:西南交通大学出版社, 2006
[2]荣延善.水平井地质导向技术的应用[J].江汉石油职工大学学报,2003,16(3):50-51.
[3]王彦祺.地质导向钻井技术在腰英台油田的应用[J].石油钻探技术,2009,37(1):39-41.
[4]裴素安.地质导向技术在冀东油田的应用[J].天然气勘探与开发,2006,29(4):57-60.
[5]时鹏程,许磊,许章延.面向地质导向应用的前导地质建模研究[J].河南石油,2003,1 7(1):20-23
[6]时鹏程,许磊,许章延.面向地质导向应用的前导模拟技术研究[J].测井技术,2000,24(6):415-419.
[7]姚姚,奚先.随机介质模型正演模拟及其地震波场分析[J].石油物探,2002,41(1):31-36.
[8]魏嘉,岳承祺,刘永宁,等.油藏综合解释软件系统的研发及应用[J].石油物探,2005,44(5):479-485.
[9]王云专,付检刚,曲忠勇,等.变差函数在储层地质建模中的应用[J].科学技术与工程,2010,10(29):7147-7150.
[10]申颍浩,刘德华,何顺利,等.子洲气田榆30井区精细地质建模与潜力分析[J].海洋地质动态,201 0.26(12):19-22.
[11]郭艳,韩志林,王亮亮.区域地震速度模型分析与应用系统的实现[J].计算机工程与应用,2009,45(31):69-72.
[12]伊向艺.石油钻采工程[M].成都:西南交通大学出版社, 2006
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