西南石油大学学报（自然科学版）2025，Vol.47Issue(5)：85-98,14.DOI:10.11885/j.issn.1674-5086.2023.12.26.31
川西气田长水平井定点分流酸压工艺及应用
Fixed-point Diversion Acid Fracturing Technology and Its Application in Long Horizontal Wells in Western Sichuan Gas Field
摘要
Abstract
The Leikoupo Formation gas reservoir in the western Sichuan gas field is mainly developed with the"ultra-long open-hole+liner completion+fixed-point diversion acid fracturing"method.The correct of the acid fracturing control range within the high-quality reservoir in the planar direction and the effective control of sweet spot reservoirs are key factors in enhancing the stimulation effectiveness of the ultra-long open-hole sections.To address these issues,the study optimizes the fracture control range for different reservoir types through production simulations and identifies the impact of reservoir heterogeneity on the fracture control range.A numerical simulation model is established,which couples acid fluid flow-reaction,pressure changes,wormhole growth,and hydraulic fracture propagation.This model is used to optimize the acid injection location,injection parameters,and timing of temporary plugging.The research findings indicate that the optimal fracture spacing within the high-quality reservoir should be ≤180 m,and a thickness of the tight band＞40 m affects the fracture control range.The maximum effective stimulation range within the wellbore is determined to be 264.6 m,and temporary plugging methods need to be employed to regulate acid absorption profiles during sweet spot dispersion.The study recommends using half of the acid volume for the initial stage of temporary plugging,and for the subsequent stage,it suggests post-plugging after the first stage or temporary plugging within the segment when injecting 50～100 m3 of acid.Based on these research results,a long horizontal well fixed-point diversion acid fracturing technique is developed and applied to five long horizontal wells,resulting in an average unobstructed flow rate of 235×104 m3/d,which represents a 63.2％increase compared to the previous period.关键词
川西雷口坡组/长水平井/定点分流酸压/吸酸剖面/暂堵时机Key words
Leikoupo Formation of western Sichuan/long horizontal well/fixed-point diversion acid fracturing/acid placement profile/temporary plugging timing分类
能源科技引用本文复制引用
王峻峰,王兴文,任冀川,何颂根,管晨呈..川西气田长水平井定点分流酸压工艺及应用[J].西南石油大学学报（自然科学版）,2025,47(5):85-98,14.基金项目
国家自然科学基金青年基金(52304047) （52304047）
