深度域地层模型在储层预测中的应用

Application of formation model of depth domain in reservoir prediction

随着勘探、开发难度的加深,钻井作业对钻前储层预测精度的要求也不断增加,其中储层深度、储层厚度和空间展布的预测精度对钻井效率、成功率,特别是对水平生产井的产能起着决定性的意义。W油田的构造是一个非常低幅度的隐蔽圈闭,加之浅层气的影响,目的层资料品质较差,造成深层水平生产井的钻前预测难度很大。通过浅层气校正、建立精确的速度模型、时间域地震数据体转换为深度域和地震反演属性体等一系列技术,得到了油田储层空间分布预测结果,用来进行钻前优化和随钻研究,使水平段钻井顺利实施,提高了钻井效率,水平生产井的产能也有明显提高。

The deeper the difficulty in exploration and development is,the more the demand of drilling operation for reservoir prediction accuracy before drilling is.The depth of reservoir,the thickness of reservoir and prediction accuracy of space distribution play decisive role for drilling efficiency and successful rate,especially for horizontal well productivity.The structure of W oilfield is a subtle trap with very low amplitude.Moreover,poor data quality of target layer influenced by shallow layer gas leads to big difficulty in prediction before drilling of deep horizontal production well.By a series of techniques such as correction of shallow layer gas,establishment of accurate speed model and conversion of depth domain and earthquake retrieval property body from time domain earthquake data body,and so on,the prediction result of space distribution in oilfield reservoir is obtained.Optimization before drilling and researches during drilling is done on that basis.Therefore,drilling in horizontal section is implemented successfully,and both drilling efficiency and productivity of horizontal production well are improved obviously.