冷41-平13水平井钻井技术

Application of the Horizontal Well Techniques to Exploit Ultra-viscous Oil Reservoir with Active Bottom-water

冷东油田冷41块S32油层底水能量大,隔夹层不发育,直井开发底水锥进严重,已进入高含水开发期,含水上升快,开发调整效果差,严重制约了该块开发。通过水平井优化部署及SAGD试验,利用水平井钻井技术,配合井下导向钻井技术可实现对底水活跃超稠油油藏的合理开采。以冷41-平13井为例,介绍了该井钻井实践,总结了利用水平井技术开采底水油藏的一般规律,对同类水平井的施工具有重要的指导意义。

Reservoirs in S_3~2 of Leng 41 block has been experienced by a high-watercut stage derived from the exploration of vertical well with serious bottom-water coning due to the active aquifer and undeveloped restraining barrier. The development of Leng 41 block has been restrained because of the high-increasing water cut and lower efficiency of the development prospect and adjustment well. A reasonable development to the ultra-viscous oil reservoir with active bottom-water has been realized in the light of horizontal well techniques combined with downhole navigation drilling techniques through optimizing the allocation of horizontal well and testing SAGD.A successful example has been presented by the well Leng 41-H13.The drilling process has been introduced, and the conventional law of the ultra-viscous oil reservoir with active bottom-water to be drilled by horizontal well techniques has been achieved. The result can be available for the similar well drlling.