D2-19大斜度井钻井技术

HIGH-ANGLE DEVIATED WELL DRILLING TECHNOLOGY IN WELL D2-19

D2 - 19井是江苏油田为开发湖底油田 ,采用常规ZJ45钻机装备施工的 1口位移与垂深比约为 1的定向大斜度井。最大井斜角 6 5° ,完钻井深 30 46m ,垂深 2 185 .49m ,井底位移 1795m。介绍了该井在井身剖面设计、井壁稳定控制、井身轨迹控制、钻井液性能的维护处理、安全钻井技术等方面所采取的技术措施。实践证明 ,所采取的工艺措施是行之有效的 ,其复杂时效仅为 1.8% ,事故时效为 0。该井的钻探成功 ,为利用常规装备和工艺技术施工位移垂深比约为 1、井底位移在 2 5 0 0m以内的定向大斜度井提供了一定的经验。

Well D2-19 is a high angle deviated directional well drilled to develop the under-lake reservoirs in Jiangsu Oilfield, and the ratio of horizontal displacement (HD) to vertical depth (VD) is about 1. The conventional drilling rig, Model ZJ45 and other common drilling equipment was used in drilling this well. Its maximum hole inclination was 65°, measured depth was 3046m, vertical depth was 2185.49 m, and horizontal displacement was 1795m. It focused on the profile design, hole stabilization control, well trajectory control, drilling fluid conditioning, and safe drilling in this paper, and these technologies were feasible and effective in field operation, as the time loss because of downhole trouble was only of 1.8%, and no serious accidents were encountered. The success of drilling this well provided some valuable experience and technology supports for drilling the high angle deviated well with ratio of HD/VD around 1, and bottom hole displacement within 2500m.