Research On Technical Scheme Of Development And Adjustment Of L1 Gas Reservoir

Up to now,it has been 31 years since the LI gas reservoir was developed.And now the gas reservoir begins to decline.As for the gas reservoir,on the one hand,the utilization degree and reeovery degree of it in the east and west are low,so the whole gas reservoir has great potential to develop.On the other hand,with low production scale,single well output,wellhead pressure and incomprehension of residual reserve distribution,the later adjustment and development of it are difficult.Therefore,it is necessary to deeply understand the development trend of the gas reservoir,study and formulate the late-stage development countermeasures of it to ensure its production capacity.In this paper,the dynamic and static geological data obtained in the production process of the gas reservoir are utilized.Based on the static and dynamic data of the gas reservoir,this paper combines the geological modeling and numerical simulation technology to finally complete and obtain the following achievements:(1)The basic geological features of the LI gas reservoir are sorted out.The gas reservoir has the characteristies of medium depth,thin reservoir,normal temperature and normal pressure and the reservoir heterogeneity is strong.The volumetric method is used again to verify the geological reserves.(2)The production performance of LI gas reservoir is clarified and the gas reservoir shows an obvious hyperbolic decline trend.(3)A production capacity evaluation model is established to evaluate the reserves utilization and the effects of measures to stabilize production.(4)A three-dimensional geological model and a numerical model are constructed to study and analyze the pressure distribution features and residual gas distribution rules of the gas reservoir and obtain the development potential of the gas reservoir.(5)The development adjustment countermeasures of gas reservoir are made successfully.According to its production status and effect evaluation of measures,four adjustment countermeasures are drawn up,the development and deployment scheme of new wells are assured,and four wells are supplied and developed in the east of gas reservoir also three in the west and one in the middle.The type of the wells is horizontal well which provides the scientific basis for subsequent development and adjustment scheme.(6)The development and optimization plan is prepared and optimized.It is predicted that in the later 15 years the final cumulative gas production volume will hit L39.73×108m3 and the production rate will hit 54.45%.CoMPared with the present,the cumulative gas production volume will increase by 6.38×108m3 and the production rate by 2.48%.