高分辨率双侧向测井响应数值模拟分析

Analysis on numeric simulation of high-resolution dual laterolog (DLL) response

我国自行研制的新型的高分辨率双侧向测井仪已逐渐投入大规模的生产应用,可为解决油田薄层油气藏的勘探开发问题提供有力的支持。本文利用有限元方法对新型的高分辨率双侧向测井仪及国内目前大规模应用的常规双侧向测井仪的分层能力、探测深度、侵入影响和井眼影响等响应特征进行了数值模拟,并对其测井响应进行了对比分析。数值模拟表明:与常规双侧向测井相比,虽然高分辨率双侧向测井资料井眼的影响更复杂,但测量结果既能得到较高纵向分辨率,又具有较深的径向探测深度,基本上可以取代常规双侧向测井仪在测井中应用。文中数值模拟结果可以为测井作业人员和解释人员在资料验收及解释处理等方面提供参考和指导。

The new type of high-resolution dual laterolog tool has been gradually put into large-scale application in production, which can provide powerful support for the exploration and development issues solving the thin-layer reservoir in oil fields. The paper used finite-element algorithm to carry out numeric simulation for such response characters as layering ability, depth of investigation, influences of invasion and borehoe of new type of high-resolution dual lateralog tool and ordinary dual laterolog tool that has been used in large scale at home up-to-now. The numeric simulation showed that in comparison with common dual laterolog although the influence of borehole on high-resolution dual laterolog data is more complex, the surveying results were characteristics of both higher vertical resolution and deeper radial depth of investigation, which can basically be applied in logging to replace common dual laterolog tool. The results of numeric simulation in the paper gave reference and guide to logging workers and interpreters in data check and interpretation as well as processing.