摘要
多形态拓展孔隙、裂隙并存理论描述了介质中孔隙与多形态裂隙体之间的相互作用,现已被用于岩石的孔隙结构反演.利用实验室加压条件下干燥和流体饱和岩石的纵、横波速测量数据,联合反演了潜山储层岩石的孔隙纵横比谱.反演结果表明:随着有效压力的增加,裂隙元素的纵横比减小,小纵横比裂隙的闭合降低了裂隙密度,导致低压段的弹性波速度显著增大.同时,在双对数刻度下,孔隙度与孔隙纵横比之间存在幂函数关系,孔隙结构指数随总孔隙度单调增加,此关系可用于判别潜山储层的有效性.本文的研究不仅为潜山储层岩石孔隙结构分析方法提供了实验验证,而且给出了一种潜山储层有效性的辅助判别方法.
The theory of multi-shape pore-crack model describes the wave propagation characteristics due to the interaction between the pore and multi-shape cracks in the medium,which has been widely used to invert the micro-pore structure.Using laboratory data of P-and S-wave velocities for dry and saturated rocks,the crack density and crack aspect ratio of buried hill reservoir rocks under different pressures are inverted.The inversion results show that the crack aspect ratio increases and the crack density decreases with increasing pressure.Meanwhile,the pore aspect ratio spectrum is inverted according to the wave velocity variation of different crack densities under zero pressure.On a double logarithmic scale,there is a power exponential relationship between the micro-pore aspect ratio and rock porosity,while the power of micro-pore aspect ratio increases monotonically with the rock porosity.This research not only provides experimental verification for micro-pore structure inversion in buried hill reservoirs,but also provides an auxiliary discriminant method.
作者
崔云江
王培春
李盛清
王文浩
熊镭
王鹤鸣
苏远大
CUI YunJiang;WANG PeiChun;LI ShengQing;WANG WenHao;XIONG Lei;WANG HeMing;SU YuanDa(CNOOC China Limited,Tianjin Branch,Tianjin 300459,China;School of Geosciences,China University of petroleum,Qingdao 266580,China;China Laboratory for Marine Mineral Resources,Qingdao National Laboratory for Marine Science and Technology,Qingdao 266071,China)
出处
《地球物理学进展》
CSCD
北大核心
2023年第4期1757-1764,共8页
Progress in Geophysics
基金
国家自然科学基金(42174145,42074137)
国家重点研发计划(2019YFC0605504)
山东省自然科学基金(ZR2019BD039,ZR201911120382)
中海油科技项目(CNOOC-KJ135ZDXM36TJ03TJ-GD2020-01)
中央高校基本科研业务费专项资金资助(20CX06077A)联合资助。
关键词
岩石物理
裂隙密度
裂隙纵横比
孔隙分布谱
实验室测量
Rock physics
Crack density
Crack aspect ratio
Pore structure spectrum
Laboratory measurement
