Study On The Measurement Method Of Tantalum Capacitance Sensor For Reservoir Physical Model Saturation

The natural parameter of reservoir rock and the fluid is important foundation data in oil-field development and reservoir engineering research. To obtain those natural parameter mainly depend on reservoir physical model experiment. However, in the reservoir physical model experiment, the dynamic measurement of saturation not only is a very important but also extremely complex difficult problem. Because the reservoir form is very multiplicity in the model, it's difficult to achieve an ideal precision. This paper aims at this difficult problem, researched and designed one kind of measurement method.Firstly, this article has carried on the brief introduction to reservoir physical model saturation measurement technology background as well as the domestic and foreign development condition,elaborated the aims of the paper and the technology path. Finally, has given the main research content of the paper.Secondly, after introduced this topic main frame, introduced three aspect contents to this topic in detail: capacitance probe sensor design, two-dimensional reservoir physical model experiment equipment hardware design and software design. In the sensor design, discussed the basic theory and characteristic of the capacitance sensor, has with emphasis studied the capacitance sensor mathematical model. According to the reservoir physical model experiment equipment characteristic, has analyzed the method of measurement oil saturation with capacitance sensor, designed the capacitance sensor and its circuit. In the experiment equipment hardware design, mainly introduced reservoir physical mode theory, given the system overall design and key technology, elaborated with emphasis the data acquisition and control board card characteristic, introduced the data acquisition unit in detail, analyzed the system work process, finally given its hardware circuit design; In the software design, with emphasis narrated the system software design and its realization, including data acquisition program, control program, balance communication program and database connection program. Then, test the software function and the result indicated the software conformed to experimental demand.Finally, through increase and decrease temperature, saturated oil, saturated water and water-oil displacement experiment, carried on the test of capacitance sensor and the experiment equipment, obtained the satisfactory experimental result.