中国石油大学学报（自然科学版）2016，Vol.40Issue(2)：52-58,7.DOI:10.3969/j.issn.1673-5005.2016.02.006
一致密储层各向异性地震岩石物理建模及应用
Anisotropic rock physics modeling of tight sandstone and applications
摘要
Abstract
One distinguishing feature of low-porosity and low-permeability sandstones is the departure of their elastic proper-ties from general porous and permeable sands. This paper developed a rock physics model focusing on the developed cracks in tight sandstones and their effects on tight sand. Pores with fluids were added to the rock matrix by using effective media theory, and cracks with fluids were added by using anisotropic fluid substitution equations which were derived by combining Hudson model and anisotropic Gassmann's equations. The elastic modulus in tight sandstones were then calculated with dif-ferent crack properties, such as crack density, crack shape, fluid content, and so on. The accuracy of the parameters esti-mation method was discussed based on rock physics model considering micro cracks. P-wave and S-wave velocities were esti-mated with the proposed modeling method. The accuracy and advantage of the model are verified by comparing with the real logging data. Thomsen parameters of fracture reservoir are extracted and can be used to indicate the cracks in reservoirs.关键词
致密储层/岩石物理/各向异性/裂缝密度Key words
tight reservoir/rock physics/anisotropy/fracture density分类
天文与地球科学引用本文复制引用
印兴耀,刘倩..一致密储层各向异性地震岩石物理建模及应用[J].中国石油大学学报（自然科学版）,2016,40(2):52-58,7.基金项目
国家“973”计划项目(2013CB228604) （2013CB228604）
