定向井/复杂井

钻非常规水平井时，多种方案可减少非生产时间

本文重点介绍了解决非常规油藏水平井油基泥浆漏失的非传统方法。

非常规感兴趣区优化了套管设计，并在垂直/曲线/水平8英寸组合剖面中对钻遇的地层进行了说明。
非常规感兴趣区优化了套管设计，并在垂直/曲线/水平8英寸组合剖面中对钻遇的地层进行了说明。
来源：SPE 23567。

非常规目标区的水平井设计采用8英寸垂直段/曲线段/水平段组合。该段通常采用油基泥浆 (OBM) 钻进。在垂直段钻穿潜在漏失区时，可能会发生严重甚至完全漏失。通过应用本文中介绍的实践，在大多数情况下都能成功堵漏，从而能够在比常规方法更短的时间内钻至井深 (TD)。

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原文链接/JPT
Directional/complex wells

Options Reduce Nonproductive Time in Drilling Unconventional Horizontal Wells

This paper highlights nontraditional methods to cure oil-based-mud losses in horizontal wells drilled in unconventional plays.

The unconventional area of interest optimized casing design, with theillustration of the formations drilled in the combined vertical/curve/lateral 8-½-in section.
The unconventional area of interest optimized casing design, with theillustration of the formations drilled in the combined vertical/curve/lateral 8-½-in section.
Source: SPE 23567.

The horizontal wells in an unconventional area of interest are designed with combined 8½-in. vertical/curve/lateral sections. The section typically is drilled with oil-based mud (OBM). Severe to total losses might occur while drilling through potential loss zones in the vertical section. By applying the presented practices in the complete paper, the losses are cured successfully in most cases to allow drilling ahead to well total depth (TD) in less time than when using conventional approaches.

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