碳酸盐岩储集层气水两相渗流实验与气井流入动态曲线——以高石梯——磨溪区块龙王庙组和灯影组为例

发布时间：2018-08-23 11:01

【摘要】：选取四川盆地高石梯—磨溪区块基质孔隙型、裂缝型、溶蚀孔洞型3类储集层全直径岩心,开展高温、高压条件下的气、水两相相对渗透率测试,分析气水相渗曲线特征及气井流入动态。将实验数据归一化处理后形成了3类储集层的气、水相对渗透率曲线标准图版;针对裂缝型储集层的渗流特点,提出气、水两相相对渗透率曲线校正方法并对相应图版进行校正;运用标准图版计算研究区不同类型储集层气水两相流入动态曲线(IPR),并通过实际井的动态进行验证。研究区储集层相对渗透率曲线等渗点含水饱和度高达70%以上,具有强亲水特征,气水共渗区间、气驱水效率以溶蚀孔洞型最大,基质孔隙型次之,裂缝型最小;岩心渗透率的恢复程度以裂缝型最大,溶蚀孔洞型次之,基质孔隙型最小。校正后的裂缝型碳酸盐岩储集层气、水相渗曲线能更好反映实际气藏的气水两相渗流规律,标准图版可用于各类气藏工程计算;计算的IPR曲线,其特征与实际生产井动态相符,可用于实际气井配产与生产动态分析。
[Abstract]:In order to test the relative permeability of gas and water at high temperature and high pressure, three types of reservoir with full diameter cores, including matrix pore type, fracture type and dissolution pore type, are selected in Gaosita-Moxi block, Sichuan Basin. The characteristics of gas-water phase permeability curve and gas well inflow performance are analyzed. After normalizing the experimental data, three types of gas and water relative permeability curves were formed, and gas was put forward according to the percolation characteristics of fractured reservoirs. The relative permeability curve of water two-phase is corrected and the corresponding chart is corrected. The (IPR), curve of gas-water two-phase inflow performance of different types of reservoirs in the study area is calculated by using the standard chart and verified by the performance of actual wells. In the study area, the relative permeability curve of reservoir has water saturation of more than 70%, which has strong hydrophilic characteristics. In the gas-water co-permeation zone, the water displacement efficiency is the largest in the solution pore type, the second in the matrix pore type, and the smallest in the fracture type. The recovery degree of core permeability is the largest in fracture type, followed by solution porosity type and matrix pore type. The corrected fractured carbonate reservoir gas, the water phase permeability curve can better reflect the gas-water two-phase percolation law of the actual gas reservoir, the standard chart can be used for the engineering calculation of all kinds of gas reservoirs, and the calculated IPR curve is consistent with the actual production well performance. It can be used to analyze the production and production performance of actual gas wells.
【作者单位】：中国石油勘探开发研究院;中国科学院大学渗流流体力学研究所;中国寰球工程有限公司北京分公司;中国科学院力学研究所;
【基金】：国家科技重大专项(2011ZX05004-005) 中国石油重大勘探专项(2012ZD01-03-01) 中国石油勘探开发研究院项目(RIPED-LFFY-2017-JS-118)
【分类号】：TE312

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