缝洞型碳酸盐岩气藏多层合采供气能力实验
发布时间：2018-09-04 10:11
【摘要】：在孔隙型、孔洞型和缝洞型岩心CT扫描、压汞资料分析储集层微观孔隙结构特征的基础上,建立多层合采物理模拟实验模型,研究了层间非均质性、生产压差、含水饱和度和水侵等因素对供气能力的影响,并采用Eclipse软件建立多层合采径向流模型对实验结果进行了验证。研究表明:缝洞型储集层渗流能力强,前期产气贡献大,孔洞型和孔隙型储集层渗流能力较弱,产气贡献主要体现在中后期;储集层渗透率的绝对大小影响自身的产能贡献率,相对大小影响多层合采总采收率;合理的生产压差下各类储集层之间可以达到"动态补给平衡"供气状态;缝洞型储集层产气能力受边底水影响较小,但会优先见水并封堵其他储集层,大幅降低合采供气能力与采收率。
[Abstract]:On the basis of pore type, pore type and fracture type core CT scanning and mercury injection data analysis of microscopic pore structure characteristics of reservoir, a physical simulation experimental model of multilayer combined production is established, and the heterogeneity between layers and the production pressure difference are studied. The effects of water saturation and water invasion on the gas supply capacity were investigated and the experimental results were verified by using Eclipse software to establish a radial flow model for multilayer combined production. The results show that the percolation capacity of fracture and cavernous reservoir is strong, the contribution of gas production is great in the early stage, the percolation ability of pore type and pore type reservoir is weak, the contribution of gas production is mainly reflected in the middle and late stage, the absolute size of reservoir permeability affects its productivity contribution rate. The relative size affects the total recovery factor of multilayer combined production, the dynamic recharge equilibrium can be achieved between various reservoirs under reasonable production pressure difference, and the gas production capacity of the fractured reservoir is less affected by the edge and bottom water. However, water will be seen first and other reservoirs will be blocked, and the combined production capacity and oil recovery will be greatly reduced.
【作者单位】： 中国石油大学(北京)油气资源与工程国家重点实验室;中国石油西南油气田公司勘探开发研究院;
【基金】：国家科技重大专项“深层碳酸盐岩气藏特殊渗流规律与储量可动性评价技术”(2016ZX05015-003) 国家重点基础研究发展计划(973)项目(2015CB250900)
【分类号】：TE37
[Abstract]:On the basis of pore type, pore type and fracture type core CT scanning and mercury injection data analysis of microscopic pore structure characteristics of reservoir, a physical simulation experimental model of multilayer combined production is established, and the heterogeneity between layers and the production pressure difference are studied. The effects of water saturation and water invasion on the gas supply capacity were investigated and the experimental results were verified by using Eclipse software to establish a radial flow model for multilayer combined production. The results show that the percolation capacity of fracture and cavernous reservoir is strong, the contribution of gas production is great in the early stage, the percolation ability of pore type and pore type reservoir is weak, the contribution of gas production is mainly reflected in the middle and late stage, the absolute size of reservoir permeability affects its productivity contribution rate. The relative size affects the total recovery factor of multilayer combined production, the dynamic recharge equilibrium can be achieved between various reservoirs under reasonable production pressure difference, and the gas production capacity of the fractured reservoir is less affected by the edge and bottom water. However, water will be seen first and other reservoirs will be blocked, and the combined production capacity and oil recovery will be greatly reduced.
【作者单位】： 中国石油大学(北京)油气资源与工程国家重点实验室;中国石油西南油气田公司勘探开发研究院;
【基金】：国家科技重大专项“深层碳酸盐岩气藏特殊渗流规律与储量可动性评价技术”(2016ZX05015-003) 国家重点基础研究发展计划(973)项目(2015CB250900)
【分类号】：TE37
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