重庆科技大学学报（自然科学版）2025，Vol.27Issue(4)：10-19,10.DOI:10.19406/j.issn.2097-4531.2025.04.002
川中地区沙溪庙组致密砂岩储层可压性评价
Evaluation of Fracability in Tight Sandstone Reservoir of the SXM Formation,Chuanzhong Area
摘要
Abstract
The evaluation of the fracability of SXM tight sandstone reservoir in the central Sichuan Basin is conduc-ted by integrating triaxial stress-strain experimental data with acoustic logging data.Firstly,the reservoir is rapidly identified through Principal Component Analysis,and triaxial stress-strain experiments are performed using the log-ging data to obtain the stress-strain curve of the rock,along with static parameters such as compressive strength and maximum load.Subsequently,by combining the longitudinal and transverse wave velocities in the array acoustic logging data,dynamic parameters are obtained to establish a rock dynamic and static parameter conversion model,and the reservoir is classified based on the compressibility index.Classification criteria for reservoirs:Class Ⅰ reser-voirs,with a compressibility index greater than 0.60,exhibit good compressibility and are prone to forming complex fracture networks,representing high-quality tight sandstone reservoirs;Class Ⅱ reservoirs,with a compressibility index ranging from 0.55 to 0.60,demonstrate moderate compressibility,necessitating the use of low viscosity frac-turing fluid or the maintenance of high net pressure within the fractures to form a good fracture network;Class Ⅲ reservoirs,with a compressibility index less than 0.55,show poor compressibility,typically failing to form an ideal fracture network,with fractures likely to close after fracturing.关键词
沙溪庙组/致密砂岩/储层可压性/脆性/测井/三轴应力Key words
SXM Formation/tight sandstone/reservoir compressibility/brittleness/logging/triaxial stress分类
天文与地球科学引用本文复制引用
苗清,齐宝权,张梦宁,赖富强,贺洪举,张树东,罗宁,幸奠琼,何仕鹏..川中地区沙溪庙组致密砂岩储层可压性评价[J].重庆科技大学学报（自然科学版）,2025,27(4):10-19,10.基金项目
国家自然科学基金青年项目"基于成像测井的页岩气储层可压裂性评价方法研究"(41402118) （41402118）
