Abstract
According to the research on wellbore pressure temperature prediction of ultra-high pressure gas Wells, the influence of ultra-high pressure on wellbore fluid physical property parameters cannot be ignored, the component model is adopted to calculate wellbore fluid PVT physical property, and the multi-phase flow model is modified to accurately predict wellbore pressure temperature distribution. For the prediction of gas deviation factor of well flow and gas viscosity of well flow, the component model has a high precision. By comparing with the prediction results of 8 black oil model methods, the pressure has a great influence on the black oil model. When the pressure is equal to 100MPa, the deviation value between the predicted results of Gopal method and Dranchuk-Abu-Kassem method and the component model is greater than 0.1, which can no longer guarantee the accuracy of gas deviation factor and gas viscosity prediction. Therefore, it is recommended to use the component model to predict the deviation factor and gas viscosity of gas well flow.
Highlights
In recent years, CNPC Southwest Oil and Gas Field Company has made great breakthroughs in gas exploration of the qixia ultrahigh pressure gas reservoir in the Lower Permian, which is expected to become another important exploration and development area in Sichuan Basin
The wellbore fluid property is the bridge between the surface production of gas well and the formation inflow, and the basis of analyzing the gas well productivity and gas reservoir reserves, the research value of which is very important
The author starts from the fluid physical characteristics of ST1, a typical uHP gas well in Sichuan Basin of China, and systematically analyzes the comprehensive influence of uHP gas well uHP on gas deviation factor and gas viscosity
Summary
CNPC Southwest Oil and Gas Field Company has made great breakthroughs in gas exploration of the qixia ultrahigh pressure gas reservoir in the Lower Permian, which is expected to become another important exploration and development area in Sichuan Basin. There are few researches on the wellbore flow characteristics of uHP gas Wells at present. Where: m is density of mixture; vm is The speed of the mixture; fm is The friction of the mixture These three parameters are closely related to the physical properties of multiphase flow mixtures. For uHP gas Wells, the traditional black oil model is difficult to accurately calculate the wellbore fluid PVT physical characteristics. Based on double agent 1 well fluid composition data, as shown, the introduction of PVT component model gas well fluid physical properties, such as gas viscosity, density, in order to accurately describe the change law of ultrahigh pressure the wellbore fluid PVT, and predict wellbore pressure - the depth, temperature - deep relationship, provide the basis for the ultrahigh pressure the wellbore multiphase flow characteristics analysis Based on double agent 1 well fluid composition data, as shown in table 1, the introduction of PVT component model gas well fluid physical properties, such as gas viscosity, density, in order to accurately describe the change law of ultrahigh pressure the wellbore fluid PVT, and predict wellbore pressure - the depth, temperature - deep relationship, provide the basis for the ultrahigh pressure the wellbore multiphase flow characteristics analysis
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
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
