海上同层侧钻井实施方案优选方法

Optimization Method for Offshore Same Layer Sidetracking Scheme

摘要:

为了评价同层侧钻井之裸眼水泥塞侧钻方式与套管开窗侧钻方式的经济性，优选侧钻方式，介绍了2口同层侧钻井的常规的设计及作业过程，分析弃井过程中打捞筛管工期的长短及裸眼水泥塞侧钻的经济性。通过建立应用侧钻方案决策图，筛选影响侧钻经济性的关键因素，归纳出的打捞筛管经济工期及经济临界剩余工期的计算方法，可用于在现场作业过程中出现筛管打捞困难的情况下，是否改变方案的决策，以达到节约成本之目的，具有一定的推广价值。

Abstract:

In order to evaluate the economy of openhole cementing sidetracking in the same layer and openhole sidetracking in casing to optimize the way of sidetracking, the conventional design and operation processes of 2 wells by the same layer sidetracking are introduced. The period of screen pipe fishing in well abandonment and the economy of openhole cementing sidetracking are analyzed, by establishing a decision graph of sidetracking scheme, the key factors affecting the economy of sidetracking are seeked out, and the calculation method concluded for the economic construction period of screen pipe fishing and critical surplus construction period of the economy can be used as the decision basis for whether the screen pipe fishing scheme should be adjusted or not.