A two-stage step-wise framework for fast optimization of well placement in coalbed methane reservoirs
A two-stage step-wise framework for fast optimization of well placement in coalbed methane reservoirs
复制标题
煤层气藏井位快速优化的两阶段逐步框架
DOI：
10.1016/j.coal.2020.103479
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发表时间：
2020-05
影响因子：
5.6
通讯作者：
Derek Elsworth
中科院分区：
文献类型：
--
作者：
Jiyuan Zhang;Qihong Feng;Xianmin Zhang;Jia Bai;C. Özgen Karacan;Ya Wang;Derek Elsworth
煤层气（CBM）已成为全球能源结构中的清洁能源，特别是在澳大利亚，中国，印度和美国等国家。煤层气的经济和成功开发需要在油田规模开发之前进行全面的评价和优化布井。本文提出了一个两阶段，逐步优化框架，以获得最佳的威尔斯部署煤层气储层的大规模开发。第一阶段采用粒子群优化算法对井网描述参数进行优化，得到最优均匀井网;随后，每个井的位置和状态（活跃/不活跃）的扰动和优化的模式内，通过集成的广义模式搜索（GPS）算法和质量图（QM）表示的生产潜力。该框架在沁水盆地的合成无烟煤煤层气储层（具有高气体含量和低渗透性）和伊利诺伊盆地的真实的油田高挥发性沥青储层（具有低气体含量和高渗透性）中进行了测试。结果表明：（i）就不同的均匀井网而言，净现值（NPV）存在显著变化（即使在威尔斯的总数相同的情况下），其最优值可以由PSO在100次数值模拟运行内有效地确定;（ii）GPS对井扰动的优化导致合成的NPV的更显著的改善，（12.3%）比真实的场模型（4.6%）;（iii）对于最佳井距较窄的低渗透综合模型（320 m × 200 m），井扰动优化对净现值增量的贡献很大程度上取决于均匀布井方案;（iv）对于具有大的最佳井距的高渗透真实的油田模型，（1300 m × 1300 m），初始均匀布井对后续井扰动解的净现值影响很小;（v）所提出的框架在计算效率、鲁棒性和生产潜力的最佳标准集方面显著优于传统的逐井级联过程。
Coalbed methane (CBM) has emerged as a clean energy resource in the global energy mix, especially in countries such as Australia, China, India and the USA. The economical and successful development of CBM requires a thorough evaluation and optimization of well placement prior to field-scale exploitation. This paper presents a two-stage, step-wise optimization framework to obtain the optimal placement of wells for large-scale development of CBM reservoirs. In the first stage, an optimal uniform well pattern is obtained by optimizing well pattern description parameters with the particle swarm optimization (PSO) algorithm. Subsequently, the location and status (active/inactive) of each well are perturbed and optimized within the patterns through the integration of the generalized pattern search (GPS) algorithm and a quality map (QM) representing the production potential. This framework was tested in a synthetic anthracite CBM reservoir in the Qinshui basin (with high gas content and low permeability) and a real field high volatile bituminous reservoir in the Illinois basin (with low gas content and high permeability). The results show that: (i) significant variations in the net present value (NPV) exist with respect to different uniform well patterns (even for cases where the total number of wells are identical), the optima of which can be efficiently determined by the PSO within 100 numerical simulation runs; (ii) the optimization of well perturbations by the GPS results in a more noticeable improvement in NPVs for the synthetic (12.3%) than for the real field model (4.6%); (iii) for the low permeable synthetic model with narrow optimal well spacings (320 m × 200 m), the contribution of the optimization of well perturbation to the NPV increment is heavily dependent on the uniform well placement solution; (iv) for the high permeable real field model with large optimal well spacings (1300 m × 1300 m), the initial uniform well placement has a very minor effect on the subsequent well perturbation solutions in terms of NPV; (v) the proposed framework significantly outperforms the conventional well-by-well concatenation procedure in terms of computational efficiency, robustness and optimal criteria set for production potential.
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DOI：
10.1016/j.fuel.2015.01.046
发表时间：
2015-05-15
期刊：
Fuel (London, England)
影响因子：
--
作者：
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DOI：
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发表时间：
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期刊：
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影响因子：
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DOI：
10.1145/2598394.2605342
发表时间：
2014-07
期刊：
Proceedings of the Companion Publication of the 2014 Annual Conference on Genetic and Evolutionary Computation
影响因子：
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作者：
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通讯作者：
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影响因子：
2.8
作者：
A. Salmachi;C. Karacan
通讯作者：
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DOI：
10.1016/b978-0-12-409547-2.14581-0
发表时间：
2020
期刊：
Comprehensive Chemometrics
影响因子：
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作者：
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通讯作者：
Federico Marini;Beata Walczak