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An Integrated Approach to Improve Drilling Performance and Save Cost in North Azadegan Field

机译:一种改进钻井性能的综合方法,节省北阿齐德根田

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Although some wells from other exploration and development projects in onshore Iran have been finished before, there is a big challenge for North Azadegan field to drill 58 wells in less than 3 years, with more than 8 upgraded 2000HP rigs in the marshy area under the economic sanction surrounding according to strict requirements of Buy-Back development contract. Moreover, operation area with average 2m water depth, about 2000m directional length section accompanied with narrow mud density window, violently fluctuations in rock strength and complete losses during cementing have also contributed to increased NPT with associated high costs in N.Azadegan field. This paper will focus on main drilling problems and integrated technique, as well as the experience and lessons learned in implementing the Iran’s development project. Specific key tactics discussed include: maximum utilization of Iranian contents, cluster well pad and auto-move rig system, bit selection and modified drillable float& shoes accessories, losses and overflow prevention measures, surface back pressure performed immediately after cement placement in a few time, a clear process for capturing the best practices and lessons learned. An integrated approach was formed to decrease single well duration with less money ahead of schedule which was fixed 120d in Buy-Back contract. On the first 10 wells, average drilling performance was improved 57% and saved millions of U.S dollars with key solutions to overcome drilling challenges.
机译:虽然伊朗陆上其他勘探和开发项目的一些剧场已经完成,但北阿齐德根领域有一个很大的挑战,在不到3年的时间内钻了58个井,在经济的沼泽地区有超过8个升级的2000HP钻机根据经营开发合同的严格要求,围绕围绕制裁。此外,具有平均2M水深的操作区域,大约2000米的方向长度截面伴随着窄泥密度窗口,岩石强度剧烈波动和胶结过程中的完全损失也有助于在N.AZADEGASGASGASTGE领域的相关高成本增加了NPT。本文将专注于主要钻井问题和综合技术,以及在实施伊朗发展项目方面所吸取的经验和经验教训。讨论的具体策略包括:伊朗内容的最大利用率,集群井垫和自动移动钻机系统,比特选择和改装钻井浮动和鞋子配件,损失和溢出防治措施,表面背部压力在几个时间后立即进行,一个明确的过程,可以捕获最佳实践和经验教训。成立了一条综合方法,以减少单一井的时间,在提前的时间表之前,在回购合同中固定120d。在前10条井上,平均钻井性能提高了57%,并节省了数百万美元的美国美元,以克服钻探挑战。

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