In the process of stratigraphic evaluation, gamma-ray (GR) logging is a commonly used method for quickly identifying rock types and determining changes in shale content. However, when interpreting the logging curves, it should not be simply assumed that “high GR values indicate shale and low GR values indicate sandstone”. More importantly, what geological features do the…
Oil and gas wells are engineered structures that provide a controlled connection between underground hydrocarbon reservoirs and surface facilities. The process of drilling and producing a well involves several stages, including exploration, well planning, drilling, casing, cementing, completion, production, and later workover or intervention. Operators rely on modern drilling rigs, simulation technologies, and monitoring systems to…
As the reservoir pressure drops, the natural energy of the production wells may not be sufficient to lift the fluids to the surface at the required rate. At this point, artificial lift technologies can provide additional energy to maintain or increase production. The commonly used artificial lift methods in oil and gas production include gas lift, electric submersible…
When it is necessary to assess the oil reservoir conditions in a well with a pre-installed casing, pulsed neutron logging (PNL) can provide an effective evaluation method. Unlike conventional open-hole well logging, PNL can assess the formation through the casing without the need to reopen the wellbore and can obtain information such as fluid saturation…
Selecting the right wireline is critical for safe and dependable well intervention operations. Wireline is commonly used in activities like well logging, perforating, setting and retrieving downhole tools, production monitoring, and mechanical intervention. Since each well can differ in depth, pressure, temperature, angle, and fluids, you should match the wireline to what the job actually…
The snubbing operation of forcibly lowering or raising the pipe string is usually employed for pressure-bearing wells where pressure relief cannot be achieved in advance. During the process of lowering or raising the tubing into or out of the well, the position of the pipe string, the well condition, and hydraulic changes can quickly lead…
Well intervention is the set of jobs done on an oil or gas well after it is already built. The goal is to bring back output, keep it steady, raise performance, or extend the time the well can produce, which is different from drilling a brand new well. With well intervention, workers reach into an existing…
The well control incident may deteriorate rapidly. The driller is usually the first to notice abnormal changes in flow rate, pressure or the volume of the mud pit. Subsequently, the Company Man needs to understand the situation, assess the risks and coordinate the response. Technical procedures may have been established, but the challenge on the…
Students majoring in petroleum engineering may have theoretical knowledge of formation pressure, static water pressure and well control procedures. However, when facing constantly changing well conditions, merely mastering formulas and operation procedures is not sufficient. The drilling simulator connects classroom theory with on-site operations, allowing students to experience different well conditions in a controlled environment, practice…
Building an oil well control training center is not simply about purchasing simulators and installing them in classrooms. A practical training center should be combined with training objectives, simulation equipment, instructors, actual operation scenarios and evaluation systems. For oil and gas companies, professional training institutions and petroleum engineering universities, a well-equipped training center can provide a…