Impact of High Resolution 3D Geomechanics on Well Optimization in the Southern Gulf of Suez, Egypt

Mohamed A. Elkhawaga, Wael A. Elghaney, R. Naidu, Assef Hussen, Ramy Rafaat, K. Baker, Ahmed E. Radwan, J. Heiland
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引用次数: 2

Abstract

Optimizing the number of casing strings has a direct impact on cost of drilling a well. The objective of the case study presented in this paper is the demonstration of reducing cost through integration of data. This paper shows the impact of high-resolution 3D geomechanical modeling on well cost optimization for the GS327 Oil field. The field is located in the Sothern Gulf of Suez basin and has been developed by 20 wells The conventional casing design in the field included three sections. In this mature field, especially with the challenge of reducing production cost, it is imperative to look for opportunites to optimize cost in drilling new wells to sustain ptoduction. 3D geomechanics is crucial for such cases in order to optimize the cost per barrel at the same time help to drill new wells safely. An old wellbore stability study did not support the decision-maker to merge any hole sections. However, there was not geomechanics-related problems recorded during the drilling the drilling of different mud weights. In this study, a 3D geomechanical model was developed and the new mud weight calculations positively affected the casing design for two new wells. The cost optimization will be useful for any future wells to be drilled in this area. This study documents how a 3D geomechanical model helped in the successful delivery of objectives (guided by an understanding of pore pressure and rock properties) through revision of mud weight window calculations that helped in optimizing the casing design and eliminate the need for an intermediate casing. This study reveals that the new calculated pore pressure in the GS327 field is predominantly hydrostatic with a minor decline in the reservoir pressure. In addition, rock strength of the shale is moderately high and nearly homogeneous, which helped in achieving a new casing design for the last two drilled wells in the field.
高分辨率三维地质力学对埃及苏伊士湾南部油井优化的影响
套管柱数量的优化直接影响到钻井成本。本文提出的案例研究的目的是通过数据集成来降低成本。本文展示了高分辨率三维地质力学建模对GS327油田油井成本优化的影响。该油田位于苏伊斯湾盆地南部,已经开发了20口井,该油田的常规套管设计包括三段。在这一成熟油田,特别是在降低生产成本的挑战下,必须寻找机会优化钻井成本,以维持生产。在这种情况下,为了优化每桶成本,同时有助于安全钻探新井,三维地质力学至关重要。老的井筒稳定性研究不支持决策者合并任何井段。然而,在不同泥浆密度的钻井过程中,没有记录到与地质力学相关的问题。在这项研究中,开发了一个三维地质力学模型,新的泥浆比重计算对两口新井的套管设计产生了积极的影响。成本优化对于未来在该地区钻探的任何井都是有用的。该研究记录了3D地质力学模型如何通过修正泥浆比重窗口计算,帮助优化套管设计,消除对中间套管的需求,从而成功实现目标(在了解孔隙压力和岩石性质的指导下)。研究表明,GS327油田新计算的孔隙压力以流体静力压力为主,储层压力略有下降。此外,页岩的岩石强度中等且几乎均匀,这有助于在该油田的最后两口井中实现新的套管设计。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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