川西地区钻井提速技术应用研究
发布时间：2019-05-16 02:52
【摘要】：川西气田主要施工目的层为蓬莱镇组和沙溪庙组,井型为水平井及部分定向探井。该地区地层非均质性强,具有一定研磨性,可钻性较差,存在定向造斜井段机械钻速低、部分区块提速工具实用性未知、部分区块高密度钻井液性能掌控能力不足等难题。克服这些难题对提高钻井速度及综合效益至关重要。本文结合川西地区的地质特征和地层特点,开展了针对定向段提速技术研究,通过岩石性能的测试和测井资料计算分析,优选了合适于川西地区的钻头,结合定向PDC钻头流场数值模拟分析,最后设计出8-1/2″WHMGP461-5五刀翼双排齿钻头,主切削齿为19mm复合片,刀翼螺旋角为15°,该钻头冠部轮廓为浅内锥-短外锥结构。该钻头在现场使用中平均机械钻速6.83 m/h,达到预期效果。为了实现轨迹的宏观控制,本文开展了轨迹预处理和着陆控制技术研究,对井下工具选择和现场操作提出了针对性强的八条技术措施。同时为了保证定向井段和水平井段钻井顺利,本文针对井眼润滑和井眼剖面优化设计也提出了技术对策。液力推进器可以解决井斜角过大时无法施加钻压的问题,本文通过什邡区块多口井液力推荐器使用分析,提出了液力推进器的使用条件和钻具组合。针对中江、新场等区块高密度钻井液流变性和沉降稳定性之间的矛盾,本文开展了温度和膨润土含量对水基钻井液性能影响的大量室内试验,总结出钻井液体系及配方,在新场,中江等代表性区块进行了多井次现场试验,效果良好。
[Abstract]:The main target layers of western Sichuan gas field are Penglaizhen formation and Shaximiao formation, and the well types are horizontal wells and some directional exploration wells. The formation heterogeneity in this area is strong, which has certain grinding property and poor drillability. There are some problems, such as low mechanical drilling speed in directional inclined well section, unknown practicability of speed raising tools in some blocks, and insufficient performance control ability of high density drilling fluid in some blocks. Overcoming these problems is very important to improve drilling speed and comprehensive benefit. Based on the geological and formation characteristics of western Sichuan, the speed-raising technology of directional section is studied in this paper. through the test of rock properties and the calculation and analysis of logging data, the bits suitable for western Sichuan are selected. Combined with the numerical simulation analysis of the flow field of the directional PDC bit, the 8 鈮，
本文编号：2477964
[Abstract]:The main target layers of western Sichuan gas field are Penglaizhen formation and Shaximiao formation, and the well types are horizontal wells and some directional exploration wells. The formation heterogeneity in this area is strong, which has certain grinding property and poor drillability. There are some problems, such as low mechanical drilling speed in directional inclined well section, unknown practicability of speed raising tools in some blocks, and insufficient performance control ability of high density drilling fluid in some blocks. Overcoming these problems is very important to improve drilling speed and comprehensive benefit. Based on the geological and formation characteristics of western Sichuan, the speed-raising technology of directional section is studied in this paper. through the test of rock properties and the calculation and analysis of logging data, the bits suitable for western Sichuan are selected. Combined with the numerical simulation analysis of the flow field of the directional PDC bit, the 8 鈮，
本文编号：2477964
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