Flow Simulation of New Well Access Based on OLGA Integrated Model
Given the serious problems of liquid accumulation and slug flow in the surface pipe network of A gas field with high water production(the water/gas ratio reaches 3 m3/104 m3 gas),a reservoir-wellbore-pipe network integration OLGA model was established based on the field data of A gas field and the changes of pressure in adjacent wells and the changes in liquid accumulation and slug flow in gathering and transportation pipelines under the conditions of new well access were studied.The results shows that the maximum error of the OLGA model established in this paper is 6.92％,which can satisfy the production simulation.When the production of the new well increases to a certain condition(such as 110 000 m3/d),the converge pressure of the adjacent well platform decreases significantly(3.75 MPa to 2.56 MPa),while the converge pressure of other well platforms do not change much(fluctuating within 0.1 MPa),mainly because the pressure drop of the confluent pipeline along the new well and the adjacent well confluent decreases significantly.The reason for the decrease in the pressure drop of the confluent pipeline is that after the new well is merged into the pipeline,the pipeline liquid accumulation,liquid holdup,and slug flow quantity are significantly reduced,which increase the transportation efficiency of the confluent pipeline,reduce the pressure drop along the pipeline,and reduce the converge pressure of the adjacent well.At the same time,it is found that the high-risk locations of fluid accumulation are mainly low-lying sections and the high-risk locations of slug flow are mainly uphill sections.
new well accessOLGAintegrated modelliquid accumulationslug flow prediction
万方数据
维普
