摘要
松辽盆地北部发育典型非常规致密砂岩油,基于"甜点"储层地震预测实际需求,采用面向储层预测的测井数据评价、岩石物理扰动模拟和地震数据刻度技术,分析该地区致密砂岩储层地震岩石物理规律.结果表明:研究区致密孔隙介质的弹性特征变化主要受岩性和物性控制,岩性控制作用更大,孔隙流体影响小;利用纵波阻抗和纵横波速度比(或泊松比)双元弹性参数交会可识别"甜点"储层;基于岩石物理刻度的叠前AVO反演是实现"甜点"储层地震预测的有效途径.研究区水平井钻探实例证明,地震岩石物理分析在基础资料认识、优化,以及"甜点"储层地震预测中具有重要作用.
To realize the delineation of ' sweet spot' reservoirs of unconventional tight sand oil in the north of Songliao basin,three key technologies associated with rock physics analysis were introduced and investigated,including well log conditioning used to reservoir characterization,rock physics modeling,and seismic data calibration,respectively.Through the detailed study,rock physics characteristics for the interval of interest was recognized.The elastic properties of tight porous materials in the zone of study are mostly controlled by lithology and porosity,and the former has relatively strong effect compared with the latter.The variation of fluids in pores play a slight role in changing elastic characterization of tight sandstones. ' Sweet spot' reservoirs can be distinguished from other lithogies in the crossplot of P-wave impedance and Vp/Vs(or Poisson ratio).Further it was pointed out that the combination of prestack inversion with seismic amplitude data and rock physics is an effective way to predict the distribution of 'sweet spot' reservoirs.A horizontal well example given in present paper demonstrated that rock physics analysis is of very importance not only in optimizing fundamental data but also in predicting the space distribution of 'sweet spot' reservoirs.
出处
《东北石油大学学报》
CAS
北大核心
2015年第5期63-70,8,共8页
Journal of Northeast Petroleum University
基金
中国石油天然气股份公司重大科技专项(2012E-2603-04)
关键词
地震岩石物理分析
致密砂岩
“甜点”储层地震预测
水平井钻探
松辽盆地
seismic rock physics analysis
tight sandstone
seismic predicting of the 'sweet spot' reservoirs
horizontal well exploration
Songliao basin
