宽带暂堵转向多缝压裂技术在苏里格气田的应用  

Application of Diversion through Broadband Temporary Plugging Multi-Fracture Fracturing Technology in Sulige Gas Field

作　　者：韩福勇[1] 倪攀[1] 孟海龙 HAN Fuyong;NI Pan;MENG Hailong(Tianjin Petroleum Institute of Technology,Tianjin 301603;Third Gas Recovery Plant of Changqing Oilfield Company,Ordos,Inner Mongolia 017300)

机构地区：[1]天津石油职业技术学院,天津301603 [2]长庆油田公司第三采气厂,内蒙古鄂尔多斯017300

出　　处：《钻井液与完井液》2020年第2期257-263,共7页Drilling Fluid & Completion Fluid

摘　　要：为了提高水平井裸眼滑套-封隔器完井、套管固井完井、桥塞分段多簇压裂等施工过程中分级压裂多缝封隔的可靠性,在实验室条件下对暂堵材料进行了分散性测试、降解性分析以及抗压破碎能力评价,并将宽带暂堵转向多缝压裂技术在苏里格气田进行现场应用,取得了较好的转向效果。应用结果表明,采用宽带暂堵转向多缝压裂技术,减少了桥塞、封隔器相关的操作,减少了电缆入井次数,降低了施工风险,提高了施工效率;同时,利用压裂产生的多条裂缝或裂缝网络与气藏富含区域连通,增加了裂缝的长期导流能力,对比同区块水平段长度及钻遇条件相当的水平井,试气无阻流量提高21.1%,投产1年,平均单井累产气量增加3.24×10^6 m^3。暂堵剂与纤维在气田储层温度在90~120℃范围内可实现10 d以内完全降解,完全符合安全环保生产要求。To improve the reliability of insulating multi fractures for staged fracturing job in horizontal well completion operation such as open-hole sliding sleeve-packer completion and casing cementing well completion as well as bridge plug segmented multi-cluster fracturing,temporary plugging agents were evaluated in laboratory experiment for their dispersibility,degradability and compression resistance.The diversion through broadband temporary plugging multi-fracture fracturing technology was used in Sulige gas field with good diverting effect.Field application showed that,using diversion through broadband temporary plugging multi-fracture fracturing technology,operation of bridge plug and packer was simplified,number of cable running reduced,operational risk mitigated and operation efficiency improved.Meanwhile,the long-term flow conductivity of fractures can be increased by the connection of multi fractures or fracture network produced by the fracturing operation to gas-rich zones.Compared with offset horizontal wells with similar horizontal lengths and downhole conditions,the open flow rate of gas during well test was increased by 21.1%.After one year of production,the average cumulative gas production of a single well was increased by 3.24×10^6 m^3.The temporary plugging agents and fibers used can be completely degraded in 10 days at reservoir temperature of 90-120℃in Sulige gas field,fully meeting the requirements of safe and environmentally friendly production.

关 键 词：多缝压裂 宽带暂堵转向 降解 评价 产能 

分 类 号：TE357[石油与天然气工程—油气田开发工程]