论文详情
多波联合反演是多波地震勘探的重要环节之一。从多波联合反演的基本原理出发,研究了该方法的特点及技术流程,并将该技术应用于SC盆地PLN地区某工区多波资料处理。首先对参与反演的子波提取方法进行了对比与选择;然后利用近、中、远3个角度域的子波进行连井线和全工区数据反演;最后利用该地区速度与孔隙度、速度与含气饱和度拟合公式得到孔隙度和含气饱和度预测结果。对多波联合反演与单一纵波反演在有效储层预测方面的实际应用效果进行了对比,结果表明,多波联合反演可以增加对反演结果的约束条件,降低单一纵波反演的多解性,提高反演精度,对储层的识别更加客观可靠,可以有效提高油气储层预测的准确性。
Multi-wave joint inversion is an important step in multi-wave seismic exploration.In this paper,the basic principle and technical process of multi-wave joint inversion are introduced,and the technique is applied to process multi-wave data from the SC basin.In the process of application,this study initially compares and selects the wavelet extraction method.Subsequently,the inversion of the well profile and the entire work area was carried out using the obtained wavelet in the near,middle,and far angles.Then,the prediction porosity and gas saturation were estimated by the velocity and porosity,and velocity and gas saturation fitting formula,respectively.Finally,the multi-wave joint inversion and the single P-wave inversion were compared with respect to the effective reservoir prediction.The results showed that multi-wave joint inversion could increase the constraints on inversion,reduce the multi-solution of the single P-wave inversion,improve the inversion accuracy,and make the reservoir identification more objective and reliable,thus effectively improving the accuracy of oil and gas reservoir prediction and development.
国家科技重大专项(2011ZX05019-008)和国家自然科学基金项目(41374111)共同资助。