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首页> 外文期刊>Petroleum exploration and development >Experiment on gas-water two-phase seepage and inflow performance curves of gas wells in carbonate reservoirs: A case study of Longwangmiao Formation and Dengying Formation in Gaoshiti-Moxi block, Sichuan Basin, SW China
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Experiment on gas-water two-phase seepage and inflow performance curves of gas wells in carbonate reservoirs: A case study of Longwangmiao Formation and Dengying Formation in Gaoshiti-Moxi block, Sichuan Basin, SW China

机译：碳酸盐岩气藏气水两相渗流与渗流曲线试验-以四川盆地高石梯—磨溪区块龙王庙组，灯影组为例

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Gas-water relative permeability was tested in the full diameter cores of three types of reservoirs (matrix pore, fracture and solution pore) in Gaoshiti-Moxi block under high pressure and temperature to analyze features of their gas-water relative permeability curves and gas well inflow dynamics. The standard plates of gas-water two-phase relative permeability curves of these types reservoirs were formed after normalization of experimental data. Based on the seepage characteristics of fractured reservoirs, the calibration methods of gas-water two-phase relative permeability curves were proposed and the corresponding plates were corrected. The gas-water two-phase IPR (inflow performance relationship) curves in different type reservoirs were calculated using the standard plates and validated by the actual performances of gas wells respectively. The results show that: water saturations at gas-water relative permeability equal points of studied reservoirs are over 70%, indicating strong hydrophilic; the dissolved cave type has the biggest gas-water infiltration interval and efficiency of water displacement by gas, followed by the matrix pore type and then fractured type; and the fractured type has the highest the permeability recovery degree, followed by the dissolved cave type and then matrix pore type. The calibrated gas-water two-phase relative permeability curves of fractured carbonate reservoirs can better reflect the gas-water two-phase seepage law of actual gas reservoirs and the standard plates can be used in the engineering calculation of various gas reservoirs. The characteristics of calculated IPR curves are consistent with the performance of actual producing wells, and are adaptable to guide production proration and performance analysis of gas wells.
机译：在高压高温条件下，对高石梯—磨溪区块三种储层（基质孔隙，裂缝和溶液孔隙）全直径岩心进行了气水相对渗透率分析，分析了其气水相对渗透率曲线和气井特征。流入动态。实验数据归一化后，形成了这些类型储层的气水两相相对渗透率曲线的标准板。根据裂缝性储层的渗流特征，提出了气水两相相对渗透率曲线的标定方法，并对相应的板块进行了校正。使用标准板计算了不同类型油藏的气水两相IPR（流入性能关系）曲线，并分别通过气井的实际性能进行了验证。结果表明：所研究储层气水相对渗透率等点处的水饱和度超过70％，表明具有很强的亲水性。溶洞型具有最大的气水渗透间隔和气态水驱替效率，其次是基质孔隙型，然后是裂缝型。裂缝型渗透率恢复程度最高，其次是溶洞型，然后是基质孔隙型。裂缝性碳酸盐岩气藏的标定气水两相相对渗透率曲线可以较好地反映实际气藏的气水两相渗流规律，标准板可用于各种气藏的工程计算。计算出的IPR曲线的特征与实际生产井的性能相符，并且可以指导生产比例和气井性能分析。

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