Research on Visual Logging Technology with Crawler in Horizontal Well

Horizontal wells have been widely used in various oil fields because of their advantages of greatly increasing the contact area between the well and the oil layer. In view of the problems of low oil and gas output and high water content in the middle and late development of horizontal wells, the CVL (Crawler VideoLog) horizontal well Crawler visualization logging technology is proposed. The paper introduces the working principle and related performance parameters of the crawler and VideoLog visual logging tool. Starting from the difficulties of horizontal well logging technology, the process principle and logging technology composition of the CVL system are introduced in detail. By analyzing the practical application of the crawler in the 4 horizontal wells to be tested, the actual well conditions of the horizontal wells are understood, which provides a new idea for the horizontal well logging technology. The practical results show that the combination of the CVL system realizes climbing and viewing, which makes it possible to observe the actual situation of the inner wall of the horizontal well, and provides a basis for operators to analyze the dynamic proportion of oil and gas.