CAJ | 학술논문

酸化是油气藏增产改造的重要措施之一。为了真实模拟砂岩基质酸化条件下类蚓孔溶蚀结构特征，开展了地层尺度下的酸化模拟研究，并推导了径向砂岩油藏酸化精细化数学模型。采用SGeMS地质建模软件构建了符合正态分布的孔隙度模型，并结合Matlab软件进行了编程求解。计算结果表明，在均质孔隙型介质中，该模型与常规模型计算结果相同；在非均质孔隙型介质中，标准偏差系数越大，类蚓孔结构越明显；表皮因数下降值越大，注液时间对标准偏差系数越敏感。虽然标准偏差系数对酸化后的孔隙度分布影响程度有限，但是确定适当的标准偏差系数对指导施工优化有重要意义。
산화시유기장증산개조적중요조시지일。위료진실모의사암기질산화조건하류인공용식결구특정，개전료지층척도하적산화모의연구，병추도료경향사암유장산화정세화수학모형。채용SGeMS지질건모연건구건료부합정태분포적공극도모형，병결합Matlab연건진행료편정구해。계산결과표명，재균질공극형개질중，해모형여상규모형계산결과상동；재비균질공극형개질중，표준편차계수월대，류인공결구월명현；표피인수하강치월대，주액시간대표준편차계수월민감。수연표준편차계수대산화후적공극도분포영향정도유한，단시학정괄당적표준편차계수대지도시공우화유중요의의。
Acidiifcation serves as one of the important measures for yield-increasing transformation for oil and gas reservoirs. To simulate characteristics of real wormhole-like corrosion structure of sandstone substrate in acidiifcation conditions, acidiifcation simulation research is developed in stratum level, and a reifned mathematical model for acidiifcation of radial sandstone oil reservoir is inferred. SGeMS geological software is adopted to build a porosity model in normal distribution, and programming and solution are also conducted in combination with Matlab software. The calculation results show that, calculation results of the model and conventional models are the same in homogeneous porous medium. In heterogeneous porous medium, the higher standard deviation factor is, the more explicit wormhole-like structure will be. Lowered skin factor is in direction proportion to sensitivity of liquid injection time to standard deviation factor. Though standard deviation factor imposes limited inlfuence on porosity distribution upon acidiifcation, determination of a proper standard deviation factor is of important signiifcance to guidance for construction optimization.