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瑞丰成功完成南海最长的水平井防砂充填作业
11 30,2016

Overview

DF1-1 gas field is one of the major fields in South China Sea operated by CNOOC, due to its reservoir characteristics, horizontal/directional well with open hole section is adopted as the main development method. Multiple horizontal wells have been drilled to develop target YG2 (Yingge 2) layer, and the target well has the record setting horizontal section, with 1080m of open hole to be completed.

Challenges & Solutions

Long horizontal section usually brings excessive friction pressure, fluid loss and uncertainties in wellbore geometry, which often lead to high risks of wellbore collapse, early sand bridging, causing failures in gravel packing. To solve the challenges brought by long horizontal section, the pumping process, especially the real time down hole pressure and return rate must be carefully monitored, and an emergency plan needs to be followed once abnormalities are observed during pumping.

Ruifeng Petrotech provided the OHGP tool string, the pumping design and field engineers for the job, with elaborate planning,

75,500lbs of proppant was successfully as per design placed on Nov. 28th of 2016, achieving 100% packing efficiency.



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