Design Of In-situ Measurement Device For Stratum Information And Study On Its Motion Characteristics

"Well-wall coring and in-situ measurement" as a new type of formation information survey method that satisfies the conditions of borehole coring,core measurement and fluid measurement has been gradually adopted and studied by major energy service companies at home and abroad.The purpose of this paper is to use three-dimensional design software to design and model the application equipment "stratum information in-situ measurement device" of the above-mentioned method.Use computer software to study the motion characteristics of the in-situ measurement device and carry out in-depth analysis and systematic discussion of the simulation results.,In order to understand and improve the shortcomings of the overall structure design of the formation information in-situ measurement device,to lay a foundation for improving the operating efficiency and the accuracy of formation information measurement of the current formation information survey equipment at home and abroad.This paper firstly analyzes the research status and development trend of the application method of "well wall coring and in-situ measurement" at home and abroad through investigation and analysis,and forms the research thinking and working framework.In view of the current problems of stuck drilling and long measurement period in the exploration and development of oil and gas fields in wellbore core equipment at home and abroad,a design plan for in-situ formation information measurement device is proposed,which solves the problem of open hole exploration.The downhole coring equipment has single operation function and inaccurate measurement data.Secondly,this paper uses the complex vector method to model the kinematics of the coring mechanism and the pushing mechanism of the formation information in-situ measurement device,and analyze its spatial motion state;the kinematics simulation is carried out through the coring and pushing mathematical model established based on MATLAB.The theoretical change curve of the model's motion characteristics is obtained.Thirdly,this paper designs a hydraulic circuit as the power source of the in-situ measurement device,analyzes and calculates the hydraulic system accumulator for the integration of the hydraulic system,and designs the detailed structure of the proposed in-situ measurement device for formation information Build with prototype model.Finally,based on ADAMS,this paper carried out a kinematics simulation on the prototype model of the formation in-situ measurement device,obtained the actual change curve of the movement characteristics of the coring mechanism and the pushing mechanism,and analyzed the difference with the theoretical change curve.The structure of each module is designed and optimized.The kinematic simulation results show that the actuator of the in-situ measurement device runs smoothly,and the coring and measurement efficiency are improved.It verifies the rationality and reliability of the structure of the in-situ measurement device designed for formation information.The application research of the "in-situ measurement" method provides a new approach and plan.