石油勘探与开发Issue(2)：194-200,7.DOI:10.11698/PED.2013.02.08
异常高压碳酸盐岩油藏应力敏感实验评价--以滨里海盆地肯基亚克裂缝-孔隙型低渗透碳酸盐岩油藏为例
Stress sensitive experiments for abnormal overpressure carbonate reservoirs:A case from the Kenkiyak low-permeability fractured-porous oilfield in the littoral Caspian Basin
摘要
Abstract
According to the characteristics of overpressure carbonate reservoirs of Kenkiyak pre-salt oil field in the littoral Caspian Basin, cores were made artificially and the stress sensibility of matrix cores and cores with non-packed, semi-packed and fully packed fractures were analyzed. The method of gas measurement was used in the experiment. The confining pressure of the sample cores was first increased and then decreased. When the confining pressure became stable, porosity and permeability data from each pressure point were obtained to analyze stress sensibility of cores. The results showed that the stress sensibility of these four types of cores with a descending order is cores with non-packed fractures, cores with semi-packed fractures, cores with packed fractures, and matrix cores. With the decrease in packing degree of core fractures, the stress sensitivity of core permeability increased and the recovery degree of permeability decreased;the recovery degree of porosity and permeability of the matrix cores and cores with fully packed fractures was high with the recovery of pressure and these two types of cores showed elastic-plastic features. By contrast, the recovery degree of porosity and permeability of cores with partly packed and unpacked fractures was lower and these two types of cores showed plastic features. With the increase of confining pressure, the variation of porosity and permeability showed relatively regular exponential variations.关键词
碳酸盐岩/异常高压/应力敏感/裂缝充填/渗透率变化Key words
carbonates/abnormally high pressure/stress sensitivity/fracture packing/permeability variation分类
能源科技引用本文复制引用
赵伦,陈烨菲,宁正福,范子菲,吴学林,刘丽芳,陈希..异常高压碳酸盐岩油藏应力敏感实验评价--以滨里海盆地肯基亚克裂缝-孔隙型低渗透碳酸盐岩油藏为例[J].石油勘探与开发,2013,(2):194-200,7.基金项目
中国石油天然气集团公司科学研究与技术开发项目(2008B-4405) （2008B-4405）
