摘要
(目的意义)探索复杂井网下防窜控水压裂技术,解决水平井压后高产水、低产油的难题,提高油井产能,提升注水开采效率。(方法过程)针对复杂井网中水平井桥塞分段压裂存在的裂缝起裂位置不明确、簇间改造不均衡等问题,提出了“精细划分、精准开发、科学评价”的压裂策略,通过精准地质导向,结合地质模型与水体分布,优化了压裂起裂点。采用连续油管底封拖动压裂技术,精确把控起裂位置,差异化设计改造规模,精准调控裂缝形态。(结果现象)在TB1区块成功应用四井次,与桥塞分段压裂工艺相比,纵向、横向上防窜效果有所提升,有效簇率、出油均一性指数指标有所提升,控水增油效果明显,产量提升了1.8倍,平均含水率下降了31.4%。该方法的成功应用解决了水平井因压窜而高含水的问题,显著提升了水平井产能,实现了良好的增产效果。(结论建议)水平井连续油管分段避射压裂思路为解决复杂井网注水开发后期挖潜难题提供了有效解决方案。
Explore the fracturing method of avoiding channeling and controlling water under complex well pattern,solve the problem of high water production and low oil production after horizontal well fracturing,improve oil well productivity and improve water injection efficiency.The reasons for the problems of bridge plug staged fracturing technology in horizontal wells under complex well pattern are analyzed.For example,the location of fracture initiation is not clear,and the transformation between clusters is not balanced.It is easy to break through with water injection wells and fractured wells.The fracturing idea of'fine division,precise development and scientific evaluation'is put forward.Accurate geological guidance,combined with geological model and water distribution map,optimizes the fracturing initiation point,uses coiled tubing bottom sealing to drag fracturing technology to accurately control the initiation position,differentiates the design and transformation scale,and accurately controls the fracture morphology.It has been successfully applied in four wells in TB1 block.Compared with the bridge plug staged fracturing process,the results show that the vertical and horizontal anti-channeling effect has been improved,the effective cluster rate and oil uniformity index have been improved,the water control and oil increase effect is obvious,the production has increased by 1.8 times,and the average water content has decreased by 31.4%.The successful application of this method solves the problem of high water cut in horizontal wells due to pressure channeling,significantly improves the productivity of horizontal wells,and achieves a good effect of increasing production.The idea of avoiding shooting fracturing of coiled tubing staged fracturing in horizontal wells.
作者
郭丁菲
哈长鸣
张文昌
李玉印
张伟
余训兵
王硕
GUO Dingfei;HA Changming;ZHANG Wenchang;LI Yuyin;ZHANG Wei;YU Xunbing;WANG Shuo(Oil Production Technology Research Institute,PetroChina LIAOHE Oilfield Company,Panjin,Liaoning,124010,China)
出处
《石油钻采工艺》
北大核心
2024年第6期715-727,共13页
Oil Drilling & Production Technology
基金
体积压裂提产关键技术研究(2022KJZX-04)。
关键词
压裂
水平井
连续油管
含水率
压窜
提高采收率
工程技术
现场实践
Fracture
Horizontal well
Coiled tubing
Water cut
Pressure channeling
Engineering Technology
Improve recovery rate
On-site practice
作者简介
通信作者:张文昌,电子邮箱:zwcscr@petrochina.com.cn。
