地层电阻率是石油测井油气解释评价的重要参数，随着油气精细勘探的深入，砾岩地层等具有各向异性的储集层逐渐成为重要的勘探方向。利用COMSOL有限元软件绘制单个砾岩地层模型，在恒定电流场下根据电流连续性定理求得砾岩地层使视电阻率。通过COMSOL有限元软件数值计算得出改变砾岩球度对砾岩地层电阻率有一定的影响，确定球度的砾岩对应于不同背景地层影响程度也不同。在此研究基础上得到球度的影响机理，为实际复杂储集层的测井油气评价和解释提供理论依据。%Formation resistivity is an important parameter in evaluation of oil well logging and interpretation of oil and gas, stratum which has anisotropic reservoir such as conglomerate stratum gradually become important exploration direction, with the deepening of the fine oil and gas exploration. This paper uses the finite element software COMSOL to draw a single conglomerate stratum model, and the apparent resistivity of the conglomerate stratum is determined by the current continuity theorem under constant current field. The change of conglomerate sphericity has certain influence on the resistivity of conglomerate formation according to the calculation of COMSOL finite element software, and it is determined that conglomerate of certain sphericity has different influence on different background formation. The influence mechanism of sphericity is obtained based on this study, which provides theoretical basis for the evaluation and interpretation of oil and gas logging in complex reservoirs.
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