Formation Evaluation

Formation evaluation is an important process for oil exploration and production. Its main principle is to use special downhole equipment to measure the resistivity, acoustic speeds, etc. of various geological formation layers. An openhole well log will be generated and geologist can interpret the recorded log data to observe many useful parameters such as porosity, saturation, etc. which are key factors to evaluate the oil & gas reservoir. There are three major well logging methods for formation evaluation, electrical, nuclear and acoustics.



Wavenology EL is a fully validated commercial software, the comparison between Wavenology EL simulated results and analytical calculated results are presented in figure 1, where (a) shows the monopole excited wave signal in an openhole. And the (b) shows the wave signals in a homogeneous lossy medium.



Fig. 1.