Development Well and Execution Planning in a Complex Subsurface Environment- The Impact of Large and Small Scale Modelling on Well Deliverability

机译：发展良好和执行规划在复杂的地下环境 - 大规模型号对井交付性的影响

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The Thylacine Gas Field is in the Otway Basin (Offshore SE Australia). The interplay of intra-field faulting and the layered geology mean that there is the potential for a high degree of compartmentalisation. A significant proportion of the reserves are thought to reside in the reservoirs of the Thylacine Sandstone Member, which are poor quality marine sands interbedded with successions of thinly bedded sand-shale and shale. Key to designing wells to achieve satisfactory deliverability was an understanding the distribution of net reservoir in the background of non-reservoir. The Thylacine development required a low cost, highly efficient development concept to tap these reservoirs. The Thylacine Alpha platform provided a base for drilling of these horizontal wells. The horizontal wells required careful positioning and design to best exploit the resource, due to a mix of the complex structure within the field and significant reservoir quality and distribution uncertainty. To better place the wells, and enhance the outcome predictability for the wells, deterministic and probabilistic amplitude -versus-offset (AVO) inversions were carried out. Simple acoustic impedance models showed improved resolution over the PSDM data, and provided insight into reservoir architecture and geometry and hence confidence in our ability to predict reservoir occurrence for drilling across the field. In parallel, a review of the available core and log data from the exploration/appraisal wells supported construction of a geological model with built-in predictability. The combination of predictive geological model, aimed at improving sub-seismic resolution, and seismic inversion to identify trends in seismic scale reservoir geometry, proved invaluable in both the well planning and execution phases of the project. This paper outlines the planning phase of the wells and influence of the geological model on resultant well designs and the preliminary outcomes of the execution phase.

机译：TheLAcine Gas Field是在Otway盆地（海上SE澳大利亚）。内部故障的相互作用和分层地质的相互作用意味着存在高度的舱室的潜力。据认为，储备的大量比例居住在夹层砂岩成员的储层中，这些砂岩构件的储层是粘着薄薄的船体砂岩较差的较薄的砂岩和页岩。设计井以实现令人满意的可交付性的关键是了解净水库在非水库背景中的分布。 Thylacine开发需要一种低成本，高效的发展概念来挖掘这些水库。 Thylacine alpha平台为钻孔提供了这些水平孔。横向井需要仔细定位和设计，以最佳利用资源，因为该领域内的复杂结构和显着的水库质量和分布不确定性。为了更好地放置井，并增强井的结果可预测性，确定有关概率和概率振幅 - 进行偏移（AVO）逆。简单的声阻抗模型显示出对PSDM数据的改进分辨率，并为水库建筑和几何体提供了深入的洞察力，因此对我们预测钻井跨越钻井的水库的能力的信心。同时，从勘探/评估井中的可用核心和日志数据的审查支持构建了内置可预测性的地质模型。预测地质模型的组合，旨在提高次地震分辨率和地震反演，以确定地震规模储层几何趋势，在项目的井规划和执行阶段证明了宝贵。本文概述了地质模型对所得井设计的井和影响的规划阶段及执行阶段的初步结果。

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《Society of Petroleum Engineers Asia Pacific Oil Gas Conference and Exhibition》|2006年||共10页
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G. Philip; S.K. Twartz; J. DePledge;
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中图分类石油、天然气加工工业;
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4. Development Well and Execution Planning in a Complex Subsurface Environment- The Impact of Large and Small Scale Modelling on Well Deliverability [C] . G. Philip, S.K. Twartz, J. DePledge Society of Petroleum Engineers Asia Pacific Oil Gas Conference and Exhibition . 2006

机译：发展良好和执行规划在复杂的地下环境 - 大规模型号对井交付性的影响
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Development Well and Execution Planning in a Complex Subsurface Environment- The Impact of Large and Small Scale Modelling on Well Deliverability

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