Audie Bates & Gary Blanks, Cardinal Surveys Co.
Production logs that are available to the industry today obtain a more accurate account of production; the main reason for the accuracy is that the well is logged in the dynamic production state. Interpretation of the production log is dependent upon understanding the mechanics of the well and the function of the combinations of logs used. The following approach is important in obtaining and interpreting good production logs: 1. Properly prepare the well to be logged prior to survey. 2. Have a basic knowledge of the tools used in each log. Understand the procedure, mechanics, and calculations needed. 3. Understand how to use each log 4. Learn to combine all logs so they present one overall picture of the production pattern. In recent years, the production log has mainly been applied in shallow wells (1,000 ft. to 5,000 ft.). Due to the soaring costs of drilling, successful attempts have been made to apply this technique to deeper wells. The case histories to be discussed in this paper are about deeper wells.