Abstract
To solve the problem that traditional single-probe instruments cannot accurately measure the gas and water holdup, the domestic design of the array holdup measuring instrument Array of Optical and Resistance Tool (AORT), composed of five sets of optical fiber probes and five sets of resistance probes, is carried out in both gas–water and oil–water. Simulated measurement experiments were conducted under different water cut in phase flow. Through the analysis of the experimental data, the response relationship between the optical fiber probe and the resistance probe of the AORT instrument in different fluids was obtained. Then, the data under different conditions of fluid, flowrate and water cut in the experiment were compared by drawing. Interpolation algorithm was used to perform two-maintenance holdup imaging, and finally the holdup image was compared with the pictures of the flow in the pipe recorded during the experiment. The results show that the resistance probe has a better response under low water cut conditions, and the optical fiber probe has a better response under high gas cut conditions, which is consistent with the theoretical analysis. The imaging diagram and the flow pattern in the pipe during the experiment are in good agreement. It can be seen that the accuracy of the holdup measured by the AORT instrument under the test conditions is verified, and can provide technical support for further carrying out the measurement and interpretation of the holdup in future, as well as the improvement of the instrument and on-site testing.
Highlights
During the development of oil and gas fields, horizontal wells are often used to penetrate the reservoir to increase the contact surface with the oil and gas reservoir to increase production and recovery efficiency
The effect of Resistance Array Tool (RAT) is better, which is closer to the experimental gas–water interface and water holdup; AORT leads to a change in water holdup, the effect is slightly worse
Through analysis of the calibration data of the AORT instrument, the response relationship of the instrument in pure gas, pure water and pure oil was established; through the imaging comparison and analysis of the gas–water and oil–water two-phase flow data, the AORT instrument is under the experimental conditions
Summary
During the development of oil and gas fields, horizontal wells are often used to penetrate the reservoir to increase the contact surface with the oil and gas reservoir to increase production and recovery efficiency. The common gas, liquid and solid three phases in multiphase flow have completely different properties, and they have different phase distributions and phase velocities when mixed together. As horizontal wells and vertical wells have completely different flow conditions, the existing singleprobe instruments and interpretation methods for vertical wells are no longer suitable for horizontal wells [1–5]. Production logging technology for horizontal wells outside China started early, and the current instruments and data-processing software are very complete. China’s domestic horizontal well technology started late, and there is no horizontal-well-measuring instrument and data-processing started late, and there is no horizontal-well-measuring instrument and data-pro software that can be used for field testing. Some companies have introduced S MPS array imaging instrument for research and horizontal well survey2so.f 8Due to t fidentiality of Schlumberger’s technology, testing services are currently only avai
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call