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.
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
Key words
Fracture/Horizontal well/Coiled tubing/Water cut/Pressure channeling/Engineering Technology/Improve recovery rate/On-site practice
维普
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