摘要
低渗储层孔隙结构复杂,非均质性强,不同类型低渗储层之间也常存在较大物性变化,难以采用统一的岩石物理模型表征储层参数与弹性参数之间的关系。针对上述难题,提出了低渗储层分层岩石物理建模方法:针对中低孔-中低渗储层采用基于DEM理论的流体均匀饱和模型;针对特低孔、特低渗储层采用基于KT理论的流体非均匀饱和模型。基于分层岩石物理建模预测的纵、横波速度与测井真实速度吻合较好,验证了该方法的可靠性。在建立准确岩石物理模型的基础上,进一步分析了弹性参数受泥质含量、孔隙度、孔隙形状等因素影响的变化规律,从而指导低渗储层的岩性及“甜点”预测。
Low-permeability reservoirs have complex pore structure characteristics for which conventional petro-physical modeling methods are not suitable for detection.In addition,physical properties among different layers of low-permeability reservoirs vary considerably,so it is difficult to use unified petrophysical model to characterize the relationship between reservoir parameters and elastic parameters.We proposed a new technical approach to stratified rock physics modeling of low permeability reservoirs:for medium-low porosity and medium-low per-meability reservoirs,the fluid uniform saturation model based on DEM theory was adopted;for extra-low poros-ity and extra-low permeability reservoirs,the fluid non-uniform saturation model based on KT theory was adop-ted.The predicted P-wave and S-wave velocities based on stratified rock physical modeling were in good agree-ment with the real logging data,which verified the reliability of the method.Based on the accurate petrophysical models,the laws of elastic parameters variations with shale content,porosity,and pore shape were further ana-lyzed,to guide the prediction of lithology and"sweet spot"in low permeability reservoir.
作者
李炳颖
涂齐催
刘江
娄敏
张佳佳
黄鑫
王腊梅
LI Bingying;TU Qicui;LIU Jiang;LOU Min;ZHANG Jiajia;HUANG Xin;WANG Lamei(Shanghai Branch of CNOOC(China)Ltd.,Shanghai 200335,China;School of Geosciences,China University of Petroleum(East China),Qingdao 266580,China)
出处
《海洋地质前沿》
CSCD
北大核心
2024年第2期59-67,共9页
Marine Geology Frontiers
基金
国家自然科学基金“东海深层低渗-致密气储层体系质量差异性成因机制及演化模式”(41672129、41602135)
中海石油(中国)有限公司重大科技项目“西湖凹陷在生产油气田中后期综合调整关键技术研究与实践”(CNOOC-KJ135ZDXM39SH03)。
关键词
低渗储层
孔隙结构
岩石物理建模
弹性参数
体积模量
剪切模量
low permeability reservoir
pore structure
rock physics modeling
elastic parameter
bulk modulus
shear modulus
