石油钻采工艺2026，Vol.48Issue(2)：177-186,216,11.DOI:10.13639/j.odpt.202507013
深层碳酸盐岩储层能量演化与裂缝网络复杂度特征
Energy evolution and fracture network complexity in deep carbonate reservoirs
摘要
Abstract
Deep carbonate reservoirs are commonly characterized by low porosity,low permeability,and strong heterogeneity,resulting in complex fracture propagation behaviors and great challenges for reservoir stimulation.Based on a 10,000-ton-capacity ultra-large true triaxial hydraulic fracturing physical simulation platform,large-scale carbonate specimens with dimensions of 2 m×2 m×1 m were used to conduct hydraulic fracturing experiments under three typical completion schemes:cased perforation in vertical wells,open-hole vertical wells,and open-hole horizontal wells.By integrating high-frequency pressure monitoring with multi-channel microseismic monitoring,fracture initiation,propagation,and spatial distribution characteristics were systematically characterized.The results indicate that open-hole horizontal wells(energy utilization efficiency 0.70,fractal dimension 1.78)are most effective in activating natural fractures and dissolution cavities,forming highly complex three-dimensional fracture networks,with the stimulated reservoir volume(SRV)approximately 2.3 times that of perforated completions.Cased perforation completions exhibit well-controlled fracture orientations but the lowest fracture complexity,whereas open-hole vertical wells show lower fracture initiation pressure and relatively stable fracture geometries.Energy analysis reveals a significant positive correlation between energy utilization efficiency and fracture complexity,with an increase of approximately 0.1 in the fractal dimension for every 0.05 increase in energy u tilization.A quantitative relationship among energy utilization,fracture complexity,and SRV is established,providing a basis for fracturing parameter design and completion selection in deep carbonate reservoirs.关键词
碳酸盐岩/水力压裂/裂缝扩展/超大型物理模拟实验/储层改造Key words
carbonate rock/hydraulic fracturing/fracture propagation/ultra-large scale physical simulation experiment/reservoir stimulation分类
能源科技引用本文复制引用
郭晓东,张士诚,张景臣,贺甲元,邱士鑫,袭祥瑞..深层碳酸盐岩储层能量演化与裂缝网络复杂度特征[J].石油钻采工艺,2026,48(2):177-186,216,11.基金项目
丝绸之路经济带创新驱动发展试验区、乌昌石国家自主创新示范区科技发展计划项目"石油工程中试创新实验平台研发与应用"(编号:2024LQ03023). （编号:2024LQ03023）
