CAJ | 학술논문

为了研究地下异常体几何及物性参数变化对井地电位法地表响应的影响规律,对垂直线源激励下的变物性参数地下异常体,采用三维有限单元法进行了正演模拟.经模拟结果表明,在浅部时异常形态清晰,随深度的增加,异常响应的形态变得模糊;地表异常响应对厚度反应不灵敏;对水平规模大小变化反应非常灵敏.这些规律将对油气田剩余油分布和注水推进前沿的确定,以及井地电位仪器分辨率的设计提供指导作用,并为井地电位法反演成像奠定相关基础.
위료연구지하이상체궤하급물성삼수변화대정지전위법지표향응적영향규률,대수직선원격려하적변물성삼수지하이상체,채용삼유유한단원법진행료정연모의.경모의결과표명,재천부시이상형태청석,수심도적증가,이상향응적형태변득모호;지표이상향응대후도반응불령민;대수평규모대소변화반응비상령민.저사규률장대유기전잉여유분포화주수추진전연적학정,이급정지전위의기분변솔적설계제공지도작용,병위정지전위법반연성상전정상관기출.
To study the influence rules of the surface abnormal response on the variable physical parameters by borehole-ground DC method,we model the abnormal response with the finite element method.The results showed the distribution of the anomalies is clear when the anomalous body lies in the shallow position,and the distribution of the anomalies became unclear with the depth increasing.The surface abnormal response is insensitive to thickness of the anomalous body,but the response is very sensitive to the lateral dimension.All these rules will give some reference and guide to determine the distribution of the residual oil and the position of the water-injection front and the design of instrumental resolution. At the same time, the results laid the foundations for inversion and imaging of borehole-ground DC method.