Study on Water Intrusion Flow Model of the Tight Gas Reservoir

IF 0.6 4区 工程技术 Q4 ENERGY & FUELS Chemistry and Technology of Fuels and Oils Pub Date : 2024-05-18 DOI:10.1007/s10553-024-01684-z
Dong Chen, Fenglai Yang, Haiming Li, Cong Wei, Min Yang, Xiaoliang Zhao, Li Dai, Jian Li
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Abstract

Aiming at the problem that the water intrusion control factors of multi-stage fracturing horizontal wells in tight gas reservoirs in edge and bottom water are not clear, the linear supply boundary is used to characterize the water intrusion characteristics and derive the mathematical characterization formula, considering the stress sensitivity and diffusion mechanisms of tight gas, and the water intrusion flow model of multi-stage fracturing horizontal well in tight gas reservoirs in edge and bottom water is established, and the bottom pressure and its derivative curves are obtained by Laplace and perturbation transformation. Furthermore, the influence of water intrusion strength, matrix-fracture channeling capacity, storage capacity coefficient, fracture segment spacing, fracture conductivity and other factors on the degree of water intrusion and water exposure time were analyzed. By fitting the well test data of the established model, the water intrusion intensity parameters can be obtained, and the water intrusion control of gas wells can be guided according to this parameter. The data analysis of two typical wells in the western oilfield was carried out by applying the established model, and the analysis results were well matched with the actual production, which verified the reliability of the model, and according to the analysis results, the treatment measures of the two wells were proposed, and the two wells obtained good production results.

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致密气藏水侵流模型研究
针对致密气藏多级压裂水平井边底水水侵控制因素不明确的问题,考虑致密气的应力敏感性和扩散机理,采用线性供水边界表征水侵特征并推导数学表征公式,建立了致密气藏多级压裂水平井边底水水侵流动模型,通过拉普拉斯变换和扰动变换得到了井底压力及其导数曲线。此外,还分析了水侵强度、基质-裂缝通道能力、储量系数、裂缝段间距、裂缝电导率等因素对水侵程度和水暴露时间的影响。通过对所建立模型的试井数据进行拟合,可以得到水侵强度参数,并根据该参数指导气井的水侵控制。应用建立的模型对西部油田的两口典型井进行了数据分析,分析结果与实际生产情况吻合良好,验证了模型的可靠性,并根据分析结果提出了两口井的处理措施,两口井均取得了良好的生产效果。
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来源期刊
Chemistry and Technology of Fuels and Oils
Chemistry and Technology of Fuels and Oils 工程技术-工程:化工
CiteScore
0.90
自引率
16.70%
发文量
119
审稿时长
1.0 months
期刊介绍: Chemistry and Technology of Fuels and Oils publishes reports on improvements in the processing of petroleum and natural gas and cracking and refining techniques for the production of high-quality fuels, oils, greases, specialty fluids, additives and synthetics. The journal includes timely articles on the demulsification, desalting, and desulfurizing of crude oil; new flow plans for refineries; platforming, isomerization, catalytic reforming, and alkylation processes for obtaining aromatic hydrocarbons and high-octane gasoline; methods of producing ethylene, acetylene, benzene, acids, alcohols, esters, and other compounds from petroleum, as well as hydrogen from natural gas and liquid products.
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