摘要
针对苏里格气田统33区块致密砂岩气藏的特点,开展了新型纤维素清洁压裂液体系研究。研制纤维素改性技术和特效交联剂,解决了以往纤维素压裂液体系的稠化剂溶解慢、交联冻胶耐温能力有限和破胶降解难的问题,形成了适合该区块的低成本低伤害压裂液体系。实验表明,该体系具有良好的耐温耐剪切性能、防膨性能和助排性能,破胶快速彻底、无残渣,岩心伤害率仅为13.2%。2013年在苏里格气田统33区块现场应用4口井,施工成功率达100%,破胶液返排速度快,最终返排率高,试气无阻流量均值约为低浓度压裂液井试气无阻流量均值的2.8倍,为致密气藏低伤害高效改造提供了一条有效途径。
A new cellulose fracturing fluid system has been developed,considering the features of tight sandstone gas reservoir in Block Tong- 33 of the Sulige Gas Field. By using cellulose modification techniques and development of highly effective crosslinkingagents,slow dissolution of viscosifiers,limited temperature tolerance of cross- linking agents,difficult degradation of broken gel and other difficulties related to the cellulose fracturing fluid system are eliminated effectively to generate a low- cost,low- damaging fracturing fluid system suitable for the block. Test results show that the system is characterized by satisfactory temperature and shear resistance,expansion prevention and drainage assistance. With thorough and rapid gel breaking capacity and no residues,the core damage is maintained at a level as low as 13. 2%. In 2013,the system was applied in 4 wells in the Block Tong- 33 of the Sulige Gas Field with success rate of 100%. With fast and efficient flowback of broken gel,and average absolute open flow 2. 8 times higher than that in the well treated with low- concentration fracturing fluids. The system can be used as an effective way to stimulate tight gas reservoirs with low damages.
出处
《特种油气藏》
CAS
CSCD
北大核心
2014年第6期123-125,147-148,共3页
Special Oil & Gas Reservoirs
基金
国家科技重大专项"低渗
特低渗透油气储层高效改造关键技术"(2011ZX05013)
关键词
苏里格气田
水力压裂
纤维素压裂液
储层伤害
增产效果
Sulige Gas Field
hydraulic fracturing
cellulose fracturing fluid
reservoir damage
stimulation effect
作者简介
段瑶瑶（1983-），女，工程师，2004年毕业于成都理工大学石油工程专业，2007年毕业于中国石油勘探开发研究院油气田开发专业，获硕士学位，现从事致密气储层改造工作。
