Research On Optimal Distribution Production Of Gas Well & Reserves And Software System Design

Based on the dynamic analyze of gas well and the theory of function simulation (including NN simulation and differential simulation) ,this paper finds an optimum method of production distribution( building up optimumin model) in different objects and develops a suit of according software. The main solution is following:1. Study the dynamic analysis and optimal distribute production of gas well based on the principle of gas engineeringStart from the physical and stratum parameter of gas reservoir (including dry gas and condensate gas) and production stat data, firstly dynamic analyze the pressure in different nodes of gas well and dynamic simulation the production course of the gas well. Sequentially on this basis process dynamic analysis and forecasting pressure and production of gas well and form according forecast models. At last set up different models structure with different goals, including the maximum production, the longest time of stated production and the maximum accumulate production. Make use of these models we can realize distribution production from gas well to gas field.2. Study the dynamic analysis and optimal distribute production of gas field based on the principle of function simulationStart from the statistic data of gas output, realize the same function by fitting history data. On the basis of establishment of the correlative relationship of the development index of gas field by use of the function simulation theory set up gas field system forecasting models, production distribution model, production constitute model and measure production constitute model. Make use of these models we can realize distribution production from gas field to gas well.3. Study the dynamic forecasting and the models of optiamal distribution production of gas well and gas field, study the algorithm of these modelsAs far as gas well is concerned, analyze the object, curb conditions and decision variable of distribution production in detail in the dirction of optimal on the basis of the dynamic simulation of gas well pressure. The objects including the maximum daily output of gas, the longest production time of gas well which stated production and the maximum accumulate production of gas well. The decision variables mainly including the size of gas mouth which can controlled and selected by worker, the size of well pipe, and so on.. The curb conditions mainly including the condition of accumulate liquid of gas well, the rot of well pipe in produce, wall sloughing, open flow capacity a, planning production, and so on. What's more, according to the different optimal distribution production models which object is different.we Study and design different algorithmsAccording to gas field, the decision variables are the all subentry gas productions, the curb conditions maily including the correlative relationship of the gas production and its influencing factors, the potential production of each subentry gas field, the potential production of each subentry step production, the capacity of step, and so on. The object functions mainly including maximum production, the minimum cost and the maximum profit. On the above basis we set up the models of optimal distribution production and optimal contrl production, and design the algorithm to these models.4. Study the multi-optimum and choosing through public appraisal of the oilfield development programming schemes.On the basis of mastery of similar coefficient method and fuzzy colligation,make the optimal schemes of gas well and gas-field is choosed and ordered according to the three index of output, gas extract speed and degree of reserve recovery. What'more, set up muti-object optimum models of gas wall production and gas-field development, sequentially the resolve methods were gave out.5. Development the software system of dynamic forecasting and optimal distribution production of gas well and gas fieldBased on the optimal method of distribute production of gas well and gas field we design the structure and function modules of this software, then, write program code and debug program ,at last create executable program. The software including modules by following: module of system safety module of pretreatment data module of dynamic analysis pressure gas well module of forecasting of development index module of optimal distribution of gas well production module of optimal distribution of gas field production6. Instance analysiswe application this sofeware system which is developmet in step4 to two factual gas field and the result demonstrate it is effective, continue application it to other gas field and get good profit.