宽方位角地震数据在储层预测中的应用

发布时间：2018-03-02 05:02

本文关键词： 宽方位地震方位各向异性走滑断裂储层预测　出处：《成都理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：相对于窄方位角地震资料,宽方位角地震资料具有更好的识别裂缝或储层的能力和成像分辨率等。本文以研究宽方位资料特点及实际应用为核心,依托准噶尔盆地MN地区MH1井区实际宽方位角地震资料,研究了宽方位角地震资料在走滑断裂解释和储层预测中的应用方法和效果。首先论述了不同方位角观测下断裂和裂缝发育带的纵波方位各向异性属性特征。对于相干、曲率等属性,当观测方位垂直于小断层走向时,小断层能获得较为清晰的成像;而当观测方位与小断层走向斜交时,小断层无法很好成像。纵波反射振幅与测线和裂缝走向有关,测线与裂缝走向平行时振幅最强;随着测线与裂缝走向夹角的增大,振幅逐渐减弱;测线与裂缝走向垂直时,振幅最弱。基于纵波方位各向异性属性特点,开展了分方位叠加资料的相干、曲率、方向加权相干、振幅等属性提取和解释工作,以走滑断裂Sylvester简单剪切模式为指导,结合研究区构造演化背景,对MH1井区走滑断裂带进行了合理解释和对裂缝发育带进行了地震预测。利用不同横纵比资料,运用波形分类、属性分析、稀疏脉冲反演及神经网络测井参数反演等技术手段开展了储层预测研究。结果表明宽方位资料预测结果与钻井资料吻合更好,认为宽方位角资料对叠置砂体的刻画和有利储层发育带的预测效果更好。本研究解释了MH1井北走滑断裂系统,落实了7个断块圈闭,面积26.7km2;研究认为裂缝发育带为近东西向和近平行于走滑断裂伴生羽状断裂走向发育;落实了三套叠置砂体的平面展布规律;研究认为MH1-MH4井砂体和MH2井砂体南部是有利储层,为研究区的勘探部署提供了有利的支撑。
[Abstract]:Compared with narrow azimuth seismic data, wide azimuth seismic data have better ability to identify fractures or reservoirs and imaging resolution. Based on the actual wide azimuth seismic data of MH1 well area in MN area of Junggar Basin, The application method and effect of wide azimuth seismic data in the interpretation of strike-slip faults and reservoir prediction are studied. Firstly, the characteristics of azimuth anisotropy of faults and fracture development zones under different azimuth angles are discussed. Curvature and other properties, when the observed azimuth is perpendicular to the strike of the small fault, the small fault can be clearly imaged, but when the observed azimuth is oblique with the strike of the small fault, The reflection amplitude of longitudinal wave is related to the measured line and fracture strike, and the amplitude is strongest when the measuring line is parallel to the fracture strike, and the amplitude decreases gradually with the increase of the angle between the measured line and the fracture strike, and when the measured line is perpendicular to the fracture strike, Based on the characteristic of azimuth anisotropy of longitudinal wave, the extraction and interpretation of coherent, curvature, directional weighted coherence and amplitude of azimuth stacking data are carried out, which are guided by the Sylvester simple shear model of strike-slip fault. Combined with the tectonic evolution background of the study area, the reasonable interpretation of the strike-slip fault zone in the MH1 well area and the earthquake prediction of the fracture development zone are carried out. Using the data of different transverse and vertical ratios, the waveform classification and attribute analysis are used. Sparse pulse inversion and neural network logging parameter inversion are used to study reservoir prediction. The results show that the prediction results of wide azimuth data are in better agreement with drilling data. It is considered that the wide azimuth data is more effective in the characterization of superimposed sand bodies and the prediction of favorable reservoir development zones. This study explains the North strike slip fault system of MH1 well and implements 7 fault block traps. The area of the fracture is 26.7 km ~ 2. It is considered that the fracture development zone is nearly east-west and nearly parallel to the strike-slip fault associated with plume fault, and the horizontal distribution of the triple-set sand body is carried out. It is considered that the MH1-MH4 well sand body and the southern MH2 well sand body are favorable reservoirs. It provides favorable support for the exploration and deployment of the study area.
【学位授予单位】：成都理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13;P631.4

【参考文献】