摘要
苏里格气田是中国典型的低渗透致密气藏,针对沙漠地形地貌特征,结合区域水文特征和现有压裂技术与作业条件,立足配套技术改进和生产组织模式优化,建立了一种适合苏里格气田特点的大井组"工厂化"压裂作业方法。方法由5部分组成:①集中供水模式(单井场水源井直供+井场"人工湖"储水);②高效压裂工艺(直井套管滑套压裂和水平井裸眼封隔器压裂两种成熟高效的多层多段压裂技术);③流水线作业模式(通洗井、射孔等六大流程批量化作业);④高效作业设备;⑤返排液回收再利用。"工厂化"作业缩短了压裂准备和作业周期,并缓解了作业环保压力。现场试验11个井组,42 d内完成14口井、67层/段压裂作业,缩短井组压裂作业周期50%以上,取得了较好的提速效果。
Sulige gas field is a typical low-permeability reservoir in China. According to desert landform features along with the regional hydrologic feature and the existing fracturing technology and operational conditions, a factory-like fracturing method suitable for Sulige gas field is established to improve techniques and production organization. This method includes five key parts：（1） centralized water supply mode （water source well supply＋artificial lake storage）;（2） highly efficient fracturing process （two mature multi-stage fracturing technologies, sliding sleeve fracturing for vertical wells and open-hole packer fracturing for horizontal wells）;（3） pipeline operation mode with seven procedures, including well drift and flushing perforation etc;（4） high efficiency operation equipment;（5） recovery of fracturing flow-back fluid. This method shortens the preparation and operation period of fracturing treatment and also relieves the pressure on environment. Pilot tests were carried out in 11 well groups in total. Sixty-seven stages of fracturing in 14 wells were successfully completed within 42 days, representing a reduction of fracturing operation cycle of more than 50%, and an encouraging improvement in efficiency.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2014年第3期349-353,共5页
Petroleum Exploration and Development
基金
中国石油天然气股份有限公司科学研究与技术开发项目"油气藏储层改造技术重大现场攻关试验"(2011-14)
关键词
苏里格气田
工厂化压裂
大井组
供水
压裂工艺
流水线作业
液体回收
高效
环保
Sulige gas field
factory fracturing
big well group
water supply
fracturing process
pipeline operation
fluid recovery
high efficiency
environment friendly
