Abstract

An attempt had been made to develop an application software to help a wellsite geologist enabling him with more accuracy and power in his activities, evenin the absence of a Mud Logging Unit. The software had been written in Visual Basic 6.0 with graphics programming and consists of five component modules that can be used effectively to plot a masterlog, a location map, a structural correlation chart, a stratigraphic litho-correlation and a well header. The masterlog component can be used to plot the ROP, Lithology, Interpretative lithology, H/C shows and Drilling Parameters and has a much better output than that of a paper masterlog with better accuracy and lesser effort. The Mapping module gives the wellsite geologist a tool to plot nearby correlative wells in both 1:20,000 and a 1:50,000 scale with an estimate of the distance between nearby wells. Additional data can be incorporated in the maps and the wells categorized as per their status. The Structural Correlation module takes care of the structural correlation where a maximum of three wells can be correlated with the input of their formation tops only from any MSL depth, the scale being calculated by the system. Similarly the Stratigraphic Correlation module can plot the lithostratigraphy of three wells and correlate them based on inputs, the scale being calculated by the system. The Header module is used to devise a well header for all the above four modules. All these applications are developed with a very easy graphic user interface and are much faster than when done manually. The basic principle of this application involves defining an initial graphic in a picture box and then scaling of the graphic as per the input values using the Paintpicture method of Visual Basic 6.0 or Bitblt API functions. All the outputs of this application are saved in image formats for later use and can be edited using image editing tools. Additionally all these modules can be run from a single master form and from a normal PC without any need of a high end workstation