0.2 m高分辨率双侧向测井仪器仿真设计

为满足油田薄层及薄互层开发的需求,采用数值模拟与电路仿真联合的交互式仪器仿真设计方法,开发了高分辨率数字聚焦双侧向测井仪器。通过仪器仿真,形成了纵向分辨率为0.2 m、深浅侧向探测深度分别为1.09 m、0.38 m的双侧向测井电极系,并得到了不同地层条件下测量信号的幅度以及视电阻率测量误差。现场应用效果表明,所设计的双侧向测井仪器的纵向分辨率与探测深度达到了理论指标,曲线重复性满足质量要求。仪器仿真方法有效地沟通了理论设计与仪器实现,不仅有助于0.2 m高分辨率双侧向测井仪器开发,同样也适用于电极型测井仪器设计。

Eimulation design of dual laterolog equipment with 0.2m high resolution

In order to meet the needs of the development of thin beds and thin interbeds in oilfields,a high-resolution digital focusing dual laterolog equipment is developed using the interactive equipment emulation design method.This method is based on a combination of numerical simulation and circuit emulation.Through equipment emulation,a dual laterolog electrode system with a vertical resolution of 0.2m is formed.The corresponding investigation depths for deep and shallow resistivities are of 1.09 and 0.38 m,respectively.The signal amplitude and the apparent resistivity measurement error under different formation conditions are also obtained.Field tests show that the vertical resolution and investigation depths of the designed dual laterolog tool are consistent with the theoretical results.The curve repeatability meets the quality requirements.The equipment emulation method effectively links theoretical design with equipment development.This method is not only useful for developing the dual laterolog tool with 0.2m high resolution dual,but also suitable for the design of electrode-type logging tools.