| Popis: |
Planning, conducting and interpreting production logging data of operating horizontal wells is a complicated problem. It is accounted for by special aspects of thermo-hydrodynamic processes taking place under the conditions of a complex wellbore trajectory with uprise, horizontal and topdown sections that affect the distribution of phasal velocities and position of interphase boundary. There are favourable conditions for countercurrent flow to be formed in the uprise sections which distorts the readings of a flowmeter and forms atypical distribution of temperature field in the flow. It is impossible to take into account complex influence of these factors using only deduction and gained experience. Thus, it is essential to apply mathematical modeling when interpreting thermal hydrodynamic data of operating horizontal wells. Mathematical models for calculating holdups, velocities, temperature distribution of cocurrent and countercurrent oil-water flow are considered in present paper. The results of calculation and their analysis are presented in the work, the results of well surveys are being discussed. |
