古龙超低渗透页岩储层增产改造新思路探讨  

Exploration of New Approaches to Stimulation of Ultra-Low Permeability Shale Reservoirs in Gulong

作　　者：范克明 邓大伟 侯堡怀 李伟[1,2,3] 于望达 Fan Keming;Deng Dawei;Hou Baohuai;Li Wei;Yu Wangda(Production Technology Institute of Daqing Oilfield Limited Company;Heilongjiang Provincial Key Laboratory of Oil and Gas Reservoir Stimulation;State Key Laboratory of Continental Shale Oil)

机构地区：[1]大庆油田有限责任公司采油工艺研究院 [2]黑龙江省油气藏增产增注重点实验室 [3]多资源协同陆相页岩油绿色开采全国重点实验室

出　　处：《采油工程》2024年第3期11-17,90,共8页Oil Production Engineering

摘　　要：随着美国页岩革命轰轰烈烈地开展,页岩油气开发在世界各油田遍地开花。页岩油超低孔超低渗,常规直井难以形成工业产能,多采用超长水平井大规模体积压裂改造技术。由于古龙页岩储层黏土矿物含量高、渗透率极低,因此在储层改造参数方面与常规储层存在较大差异。针对页岩油纳米孔喉条件,评价了页岩油压裂液与岩石配伍性、储层滤失特性及压后返排情况,分析了压裂液在裂缝内的赋存状态、支撑剂沉降规律及放喷时裂缝内流体流动形态,提出了压裂液优选方向和支撑剂加注程序,为页岩油人工裂缝设计提供新的思路。As the shale revolution in the United States rapidly progresses,the development of shale oil and gas has flourished in oilfields worldwide.Due to the ultra-low porosity and ultra-low permeability characteristics of shale reservoirs,conventional vertical wells struggle to achieve industrial production capacity.Consequently,the prevalent approach involves the use of ultra-long horizontal wells with large-scale volume fracturing stimulation technology.Given the high clay mineral content and extremely low permeability of the Gulong shale reservoir,there are significant differences in reservoir stimulation parameters compared to that of conventional reservoirs.Focusing on the condition of nano-pore of shale oil reservoirs,this study evaluates the compatibility between fracturing fluids and reservoir rocks,reservoir fluid filtration loss characteristics,and post-fracturing flowback performance in shale oil reservoirs.It also analyzes the retention of fracturing fluids within fractures,the sedimentation rules of proppants,and the fluid flow patterns within fractures during well blowout operation.Based on these analyses,the study proposes the optimal direction of fracturing fluid selection and proppant injection procedures,offering new insights for the design of artificial fractures in shale oil reservoirs.

关 键 词：纳米孔喉 压裂液滤失 分散率 砂比 支撑剂粒径 驱替压力 

分 类 号：TE357[石油与天然气工程—油气田开发工程]