INTRODUCTION RULES OF MUD LOGGING ENGINEERING AND PRODUCTION WELL TESTING ANALYSIS

This course was divided in two sections. At first section, the lecture was presented by Mr. Sugeng and second section the lecture was presented by Mr. Made. But before first section was started, Mr. Made was given an introduction of that course. According to himself, drilling must be saver, faster, and cheaper. To be an expert geophysicist in oil industry, we must have a high qualities to comunication, making good relation with other people, and must know how we sell ourself (our abilility).

At first section, Mr. Sugeng gave the lecture about Basic Mud-logging Engineering and its Role in the Oil Industry. He explained that mud-logging work when the drilling is in progress and monitored 24 hours in a day. Mudlogging crew officiate to operate mud-logging unit, monitoring drilling, collecting and evaluating data. The contribution of mudlogging is make drilling saver, faster, and cheaper. There are more 20 sensors which be installed in mudlogging tool.

Mr. Sugeng also explained that drilling is the activity to make a hole. It is the only one way to proof interpretation from seismic method and the other data included mudlogging about existence of oil and gas in subsurface. There is no instrument available which indicate the presence of oil and gas in subsurface. But by well log data about cutting samples and its oil content and gas reading, electric log data, and the contents of fluids such as gas, oil, or water will be recovered. In drilling process there are three main system, hoisting system, rotating system, and circulating system. The drilling process is done step by step and there are about seven casing design.

There  are some problems can happen when the drilling in process. The problem can be caused by the hole, mecanics, or non-technical factors. In this section we were explained about blowout in Panji well Porong, Sidoarjo which caused eruption of mud vulcano. As we know, the eruption of mud has continue until now. According to Mr. Sugeng’s, that incident was caused by human error. There was mistake when drilling in progress. This mistake was in mudlogging data reading and cementing.

In second section, Mr. Made shared his experience about Wireline Formation Testing (SFT). He explained that there are some test in wireline formation testing and sampling. They are RFT (Repeat Formation Tester), MDT (Modular Dynamic Formation Tester), RCI (Reservoir Characterization Instrument), FMT (Formation Multi Tester) and SFT (Sequential Formation Tester). From the test we will know some information such as type, location, and prospect of fluids, condition of the zone, and type of rock in the well. The answer of logging will provide water saturation, hydrocarbon mobility, hydrocarbon type, permeability, lithology, structure, images, and rock/ fluid samples (PVT) underground.