一期井OPW:通过消除地面套管,高效经济地解锁浅层油藏

I. Hanif, B. Sayogyo, R. Riko, Praja Hadistira, Karina Sari
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摘要

Tunu是一个成熟的大型天然气和凝析气田,位于印度尼西亚东加里曼丹的Mahakam三角洲。该油田已经开发了近30年,目前已经被认为是一个成熟的油田,在这个领域下一口经济井的难度越来越大。图努较深层已不再被认为是有利可图的,目前的重点是在图努较浅层广泛存在的浅层气袋。一期井是没有9-5/8”地面套管的井。OPW是使用转喷器模式从地面到TD的一段钻井,不使用防喷器。OPW的历史始于2018年,当时使用两阶段的转喷器模式钻井储层。2018年也成功完成了地面射孔套管作业。由于在使用暂堵剂和射孔地面套管的钻井作业中取得了成功,2019年进行了OPW钻井试验。到目前为止,OPW体系结构已成为钻井作业中常用的优化体系结构之一。截至2020年12月,PHM已经完成了15口以上的OPW井。OPW和SLA井的总体比较是建井成本约为20万至30万美元。OPW井的缺点是,当使用9-1/2”井眼时,泥浆和水泥段的成本更高,但就持续时间而言,OPW井的钻井时间更有效,可达2-3天。如果从OPW井的完整性来看,在已经完成的15口OPW井中,只有2口存在SCP。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
One Phase Well OPW : Unlock Shallow Reservoir Efficient and Economically by Eliminating Surface Casing
Tunu is a mature giant gas and condensate field locate in Mahakam Delta, East Kalimantan, Indonesia. The field has been in development for almost 30 years and currently has been considered as a mature field where to put a state of an economic well has become more challenging nowadays. The deeper zone of Tunu has no longer been considered as profitable to be produced and the current focus is more on the widespread shallow gas pocket located in the much shallower zone of Tunu. One phase well is architecture without 9-5/8" surface casing. OPW is one-section drilling using a diverter mode from surface to TD without using BOP. Historical for OPW is began from 2018, where drilling reservoir section using diverter mode in two-phase. In 2018 also succeeded in performing perforated surface casing. Due successfully in drilling operation using diverter and perforated surface casing, in 2019 drilling trials for OPW were carried out. Until now, the OPW architecture has become one of the common architecture used in drilling operations as an optimization effort. Until December 2020 PHM has completed 15+ OPW wells. A general comparison of OPW and SLA well is at the cost of constructing a well of approximately 200,000 - 300,000 US$. The disadvantages of OPW wells are more expensive in the mud and cement section when using a 9-1/2" hole, but in terms of the duration, OPW drilling time is more efficient up to 2-3 days. If viewed from the integrity of the OPW wells, from 15 OPW wells that have been completed, only 2 of them have SCP.
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