Study And Design On Detection And Analysis System Of The Hydrocarbon Migration In Complex Fault Zone Based On Tectonic Distortion

Physical simulation experiment of hydrocarbon migration in complex fault zone thatbased on Tectonic Distortion can reproduce the hydrocarbon accumulation, and has importantguiding significance for studying the formation mechanism of geological structure and thedirection of hydrocarbon exploration. Based on the thorough analysis of the current conditionof simulation experiment, this thesis systematically conducts research on it, the keytechnology of integration experiment, including tectonic deformation and hydrocarbon filling.And a detection and analysis system for hydrocarbon filling has been designed and developed,which can effectively realize real-time detection and storage management of variousparameters throughout the hydrocarbon migration process.According to the results of numerous pilot experiment, a optimization design ofintegration experiment flow has been made, which includes structural deformation,hydrocarbon filling and parameter detection. The design has a strong focus on some difficultproblems, such as model transport, model sealing, hydrocarbon tinting and visible experiment.As the requests of constant velocity or constant pressure during hydrocarbon filling, aconstant speed and pressure duplex pump, that its mechanical structure consists of wormgears and ball screw drive, and servo drive control system taking PLC as the core, is proposed.The constant speed is realized by the speed closed-loop feedback of the servo system. In orderto achieve constant pressure control, PLC is used to collect pressure signals, and then thefilling pressure is maintained at a constant state by the combination of PID algorithm andvelocity mode. The real-time results of signal acquisition and display are showed on thetouch-screen and human-machine interface. A new type of automatic oil water separation metering installation is designed based onthe density difference between oil and water, so that the real-time separation and automaticmetering of oil-water mixture out from the model are done continuously. A opto-electronicsignal will be triggered when the dyed oil floats up to a set position and blocks the light, thenoil is discharged by a peristaltic pump. Silver needle electrodes will be closed when the waterfloats up to the electrode bottom position, then starts the drain valve. The whole operationprocess is controlled by a single chip microcomputer system, it can be set up to startautomatically or manually. Oil and water that Separated from the mixture can be measuredrespectively by two precision electronic balances, and the measuring accuracy can becontrolled within±0.1ml. A thermostat is designed based on the intelligent temperaturecontroller, and the Control precision is±1℃. The whole metering installation can beconnected to the PC, then parameter configuration and data display can be realized.In order to achieve real-time detection of the internal pressure and oil-water saturationduring hydrocarbon filling, a contact detection system is designed. The system mainlyconsists of21measuring probes, which can achieve accurate measurements for21points.According to the experimental requirements, each Probe can be placed in different positionand depth. The pressure inspection equipment is composed of pressure sensor and intelligentitinerant detector. The saturation detecting equipment is designed on the principle ofelectrical resistivity measuring technique. The impedance of the measuring point is measuredby using LCR digital electric bridge, and oil-water saturation values are calculated based onthe famous Archie equation. In order to realize multi-electrode selection, the control system isdesigned by single-chip technologyThe detection devices designed and realized in the research has been taking lengthymeasures in the actual hydrocarbon filling experiments. The results show that the system canrealize real-time detection of various parameters, such as filling pressure and flow rate,internal pressure, oil and water saturation, oil and water quality, etc. The experimental dataare within the range of the admissible error, every working index has reached the designrequirements.