Pre-stack elastic parameter inversion of ray parameters

被引:2
|
作者
Liu Ling [1 ]
Liu Lihui [2 ]
Wo Yujin [1 ]
Sun Wei [1 ]
Zhang Lingling [3 ]
Lu Rong [2 ]
机构
[1] Sinopec, Petr Explorat & Prod Res Inst, Beijing 100083, Peoples R China
[2] Rockstar Petr Sci & Technol Ltd Co, Beijing 100192, Peoples R China
[3] Century Kingdo Petr Technol Ltd Co, Beijing 100029, Peoples R China
关键词
Ray parameter; P gather; Ray elastic impedance; Pre-stack elastic parameter inversion; Bayesian sparse pulse inversion; Constrained search method; AVO INVERSION; IMPEDANCE; FLUID; GAS;
D O I
10.1016/j.jappgeo.2019.01.003
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
P is a ray parameter. Seismic wave path of P gather spreads nearly along the ray path. Compared with angle gather, P gather can be obtained directly from seismic data and is independent of overlying strata velocity, which avoids the inversion error caused by inaccurate velocity models. Based on P stacked gather, ray elastic impedance of different P values and pre-stack elastic parameters have been computed using Bayesian sparse pulse inversion and constrained search method, respectively. The method has been applied to reservoir prediction of the Yuanba area in the north of Sichuan depression. Exploration results indicated that P stacked data can better delineate the geological body compared with angle stacked data. In addition, stable solutions are easier to be obtained by Bayesian sparse pulse inversion and constrained search method. The pre-stack elastic parameters of P gather showed higher precision and more authenticity than that of angle gather. This methodology has achieved excellent results in reservoir prediction of the Yuanba area and has huge potential for future application in exploration and development. (C) 2019 Elsevier B.V. All rights reserved.
引用
收藏
页码:13 / 21
页数:9
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