致密火山岩储层难压原因分析及对策——以X气田为例  

Analysis and Countermeasures of Difficult Fracturing in Tight Volcanic Rock Reservoirs——A Case Study of X Gas Field

作　　者：王一群[1] 郎爽[2] 孙翰文 郭光辉[1] 贾国超[1] Wang YiQun;Lang Shuang;Sun Hanwen;Guo Guanghui;Jia Guochao(Gas Production Branch of Daqing Oilfield Limited Company;No.3 Oil Production Plant of Daqing Oilfield Limited Company)

机构地区：[1]大庆油田有限责任公司采气分公司 [2]大庆油田有限责任公司第三采油厂

出　　处：《采油工程》2024年第3期18-23,90-91,共8页Oil Production Engineering

摘　　要：针对X气田致密储层改造困难问题,通过建立数学模型,计算并分析了储层在压裂改造过程中的起裂压力及裂缝宽度。研究发现,储层岩石起裂压力受射孔参数与井眼轨迹影响较大,极差可达36.34MPa;而储层裂缝宽度则受排量、液量、岩石性质等影响较大,多种因素的共同作用导致了储层改造困难。根据分析结果,采用优化射孔位置及井眼轨迹、增加承压能力、提高前置液比例等技术对策,提升压裂设计符合率、提高压裂施工压力、增加人工裂缝长度和宽度,使X气田致密储层平均压裂成功率提升了11个百分点,有效指导了目标气田的高效开发。In response to the difficulty of fracturing stimulation in the tight reservoir of the X gas field,a mathematical model was established to calculate and analyze the initial pressure and fracture width of the reservoir during the fracturing process.It was found that the initial pressure of the reservoir rock is greatly influenced by the perforation parameters and wellbore trajectory,with a maximum difference of up to 36.34 MPa.The fracture width of the reservoir is significantly affected by factors such as displacement,fluid volume,and rock properties.The combined effects of various factors contribute to the difficulties in reservoir stimulation.Based on the analysis results,technical strategies such as optimizing perforation locations and wellbore trajectories,increasing pressure-bearing capacity,and increasing the proportion of pre-fluid were adopted to improve the fracturing design compliance rate,increase the fracturing operation pressure,and extend the length and width of artificial fractures,resulting in an eleven percent increase in the average fracturing success rate for the tight reservoirs of X gas field.This effectively guided the efficient development of the target gas field.

关 键 词：气井 压裂 裂缝宽度 起裂压力 火山岩 

分 类 号：TE37[石油与天然气工程—油气田开发工程]