赵东平台C/D区块水平井钻井完井配套技术

赵东合作区应用固定平台钻井,受平台面积限制,为提高油藏利用率和油田整体开采效果,多采用大位移井和水平井。水平井以开发单一油层为目的,对井眼轨迹控制精度要求高,而且水平井的水平段套管下入困难,钻井难度远大于陆地常规水平井钻井。为此,赵东合作区采用批量钻井技术,提高钻井速度;利用旋转地质导向技术避免滑动钻进的风险,提高机械钻速;利用弯螺杆实现一次趟钻完成造斜段、增斜段和稳斜段的钻进;利用LWD/MWD随钻测井技术和Azitrack油藏地质导向系统控制井眼轨迹,提高油藏钻遇率和入靶精度;采用漂浮下套管技术解决长水平段摩阻大、下套管难等问题;采用优质钻井液和低密度高强度水泥浆来提高固井质量,保护油层;利用裸眼砾石充填精细防砂工艺进行先期防砂,充分发挥油井产能,并长期保持稳产。赵东合作区对以上技术进行集成,形成了适合赵东合作区的水平井钻井完井配套技术,并对赵东合作区的开发起到了推动作用。

Integrated Drilling and Completion Technology of Zhaodong Platform in C/D Blocks

The fixed platforms were used in drilling Zhaodong cooperation zone,due to the restriction of limited platform area,many horizontal wells and extended-reach wells were drilled in order cooperation zone to improve recovery.Since horizontal well is aimed at a single pay zone,the requirement of well trajectory accuracy is high,and the horizontal section casing running is difficult.The drilling challenges in horizontal wells are much higher than conventional drilling.Therefore,batch-drilling technology was used...