中国石油大学学报（自然科学版）2011，Vol.35Issue(3)：51-57,7.DOI:10.3969/j.issn.1673-5005.2011.03.010
基于时空双变网格算法的碳酸盐岩裂缝型储层正演模拟
Forward modeling of carbonate fracture reservoir based on time-space dual Variable grid algorithm
摘要
Abstract
The space variable grid method was improved by introducing local variable timestep scheme.Fractures were treated as local heterogeneous bodies, and fracture media was represented by using different size of grid samples.Wave equation was solved directly by finite difference method.Seismic forward modeling of micro-fractured reservoir of field carbonate velocity models was realized, and some detailed wave-propagation phenomena were gotten.The results show that local variable timestep scheme can realize local refinement calculation in a global timestep, which solves huge computing resource and time consuming problems caused by fine timesteps in the global models.Fracture density and fracture length have much effect on amplitude and polarity of seismic record, and a weak fracture reflection energy always follows reflection wave closely.Subsurface structure affects fracture characteristics a lot.Fracture reflection characteristics of flat strata and undulation strata are quite different.So fracture growing zones can be found according to different fracture reflection characteristics if subsurface structure is known.关键词
碳酸盐岩/裂缝储层/变时间步长/正演模拟/地震响应Key words
carbonate/ fracture reservoir/ variable timestep/ foward modeling/ seismic response分类
天文与地球科学引用本文复制引用
张慧,李振春..基于时空双变网格算法的碳酸盐岩裂缝型储层正演模拟[J].中国石油大学学报（自然科学版）,2011,35(3):51-57,7.基金项目
国家油气重大专项课题(2008ZX05014-001-008HZ) （2008ZX05014-001-008HZ）
国家自然科学基金项目(40974073) （40974073）
