Intelligent Decision Support System

This article is about IDSS (intelligent decision support system) based on the optimizing study of the schemes of gas-conveying at high/low pressure in LuoDai gas field. The schemes of gas-conveying at high/low pressure in the LuoDai gas field are designed to resolve some problems. The LuoDai gas field penglai gas wells have different store depths, stratum pressure and exploitation time, and the pressure will progressively decrease in the exploitation periods, so the gas wells are badly influenced by the convey pipelines. In addition, the pipes in the gas field are thin, so the losses of pressure are large amounts. In order to balance the pipelines pressure to the low pressure gas wells, keep gas wells pressure steady, reduce the discarded pressure, raise the gas field gathering rate and boost the pressure in the later exploitation stage, the LuoDai gas field should convey gas separately at high/low pressure.The LuoDai gas field schemes of gas-conveying at high/low pressure intelligent decision support system combines organically the model base, knowledge base ( export system), database and man-machine interactive system, thus it can make export inference in qualitative analysis, quantitatively data calculation and database process. This system also utilizes the data warehouse and data-mine information technology. Data warehouse is a decision service data organization and storage technology which developed from the database technology. Data-mine is a series of methods and technologies to get knowledge through the data analysis of database and data warehouse. These two technologies can support the decision process. And because they have inner relations so if integrate them into one system, they can improve the decision support ability more efficiently.Through the LuoDai gas field intelligent decision support system designing, development and research, we have got some information as follows:1. The LuoDai gas field IDSS is based on the data-mine and data warehouse. This article describes the differences between the decision support system, intelligent decision support system, the form of the IDSS and the applied data-mine and data warehouse technology.2. With gathering and arranging the data of the store depth, coordinates and pithead pressure of the penglai 67 gas wells, we have defined the discarded gas wells pithead pressure, worked out the rules of the gas wells yield progressively decrease and predicted the time when to convey gas at high/low pressure separately.3. We have culled the gas storage calculation methods, worked out the gas well yieldprogressively losses program and analyzed the 67 wells conveying data separately.4. We have gathered the data of the gathering and conveying gas in the 165.834km pipelines and the data of the output of 23 gas stations.5. We have designed the models of the 165.834km pipelines, 34 gas stations and 67 gas wells used ReO Resources optimizing software and wellfllo software.6. We have designed the non-linear optimizing model of the gas conveying at high/low pressure and worked out 80 cost minimum schemes and 40 profit maximum schemes.7. Finished the study of the optimizing of the gas-conveying schemes.To sum up, LuoDai gas field IDSS is a multiple system which combined model base, knowledge base, database and man-machine interactive system, and used data-mine and data warehouse technologies. This system includes man-machine dialogue system, gas well pressure prediction system, gas well storage prediction system, output prediction system, gas conveying schemes formulated and decided system.