The Study of Non-Metallic Screen Application In Coal Bed Methane (CBM) Well

This study is about cost saving initiative (CSI) in reducing the high completion cost of the steel slotted screen pipes in coal bed methane wells and also to provide a theoretical study of low intensity non-metal completion pipes, then to perform lower cost screen completion. The main problem is the high completion cost of steel-slotted tubing in completion and improper selection of slot density and slot width. This paper adopts survey to measure the collapse resistance of non-metallic pipe using Universal Testing System (UTS) and make analysis about the relationship between the slot density and slot width with the collapse resistance and at the end, to provide comparative analysis between the cost of non-metallic and metallic screen pipe. The polyvinyl chloride (PVC) Schedule 80 pipes are used as the non-metallic in the study due to its strength and low weight. The study shows that, the collapse pressure is affected by the slot density and slot width as the pipe collapse pressure is inversely proportional for both of them. Apart from that, this research also study about the suitability of the non-metallic screen pipe to be installed in coal bed methane, by comparing the collapse resistance and reservoir pressure of three different case studies. In theoretically, non-metallic screen pipe can be installed in the coal bed methane and the cost of the non-metallic screen completion is lower than the cost of the metallic screen completion.