特种油气藏2025，Vol.32Issue(6)：69-77,9.DOI:10.3969/j.issn.1006-6535.2025.06.008
低渗砂岩储层脆性特征评价方法及影响因素分析
Evaluation method and influencing factors of brittleness characteristics in low-permeability sandstone reservoirs
摘要
Abstract
To address the problem that the unclear brittleness characteristics and influencing factors of low-permea-bility sandstone reservoirs restrict fracturing optimization design,the study takes cores from the Wenchang Forma-tion in the Pearl River Mouth Basin and the third member of the Shahejie Formation in the Bohai Bay Basin as re-search objects.Using the principle of post-peak energy conservation,the brittleness characteristics and main con-trolling factors of reservoir rocks were analyzed,and a comprehensive evaluation method was constructed.The study shows that the brittleness of rocks varies significantly across different layers;quartz and calcite promote brittleness,while clay minerals and porosity reduce brittleness;when porosity is greater than 10%,porosity is the main control-ling factor(brittleness is generally low)and mineral composition is a secondary factor;when porosity is not greater than 10%,mineral composition is the main controlling factor and porosity has little influence.This study can pro-vide an important basis for fracturing optimization design in low-permeability reservoirs.关键词
低渗储层/脆性/矿物组分/孔隙度/成岩作用/综合评价Key words
low-permeability reservoir/brittleness/mineral composition/porosity/diagenesis/comprehensive e-valuation分类
能源科技引用本文复制引用
范廷恩,付晓飞,杨仁锋,杨二龙,王升,逄淑伊..低渗砂岩储层脆性特征评价方法及影响因素分析[J].特种油气藏,2025,32(6):69-77,9.基金项目
中国海洋石油集团有限公司"十四五"重大科技专项"海上低渗及潜山油气田有效开发技术"(KJGG2022-0700) （KJGG2022-0700）
