The Study On Countermeasure Research Of Huanglong Field Changing Formation Gas Reservoir

Huanglong field changing formation gas reservoir is a typical carbonate lithologic trap gas reservoir,has buried deep,strong heterogeneity,etc.The development of gas reservoir was put into operation in April 2003,facing a dramatic decrease of production and the water invasion serious problems,lead to understanding of remaining reserves of gas reservoir distribution is not clear,the late development adjustment difficulties.Therefore,in order to rationally develop the gas reservoir,improve the recovery degree of gas reservoir,for gas reservoir development adjustment countermeasures is very important.In this paper,based on the static and dynamic data of Huanglong field changxing formation gas reservoir,By adopting the combination of theoretical research and numerical simulation research train of thought,Integrated application of percolation mechanics,reservoir engineering,modern mathematics,numerical simulation technology and other multi-disciplinary theory and technology.First of all to establish gas reservoir capacity evaluation model,analysis of the law of diminishing gas reservoir and gas well producing reserves,the dynamic development characteristics of gas reservoir,gas reservoir development effect evaluation;Second,through the study of gas reservoir gas reservoir engineering and numerical simulation of water influx,water body size,water activity,and the main factors influencing the gas reservoir water invasion,reveals the gas reservoir water invasion law;Again,through the establishment of the numerical simulation model to study gas reservoir distribution characteristics of the residual gas,for gas reservoir development potential;Thus making reasonable development adjustment countermeasures for gas reservoir;Through the study of main innovative points and results obtained as follows:(1)Setting up suitable for the water and the gas reservoir water production gas well productivity calculation model,Find out the influence law of the moisture ratio on gas well open-flow capacity,Get open-flow capacity gas reservoir and water ratio relation function.(2)Setting up the mechanism of edge water gas reservoir gas well see water law model,Simulation with edge water gas well performance,Know the edge water movement rule and the main factors influencing the edge water gas reservoir water invasion,find out the laws of the edge water movement.(3)Understanding the huanglong field changxing formation gas reservoir water invasion characteristics,Overall performance for the south and north wing structure of lower position huanglong 001-X1 well and huanglong 004-X3 well has obvious water invasion,South water more active than north.(4)Clarify the huanglong filed changxing formation of remaining gas distribution law of gas reservoir,mainly distributed in middle and high gas reservoir,the remaining reserves of 36.63×10~8m~3.(5)To establish the integrated optimizing proration and drainage gas recovery in gas reservoir development adjustment countermeasure,predict 15 years and predict the final tired gas production 59.98×10~8m~3/d,recovery degree 74.49%,exhausted gas production from current production situation improved 1.92×10~8m~3/d,recovery degree increased by 2.10%.Edge water front advance to HL001-X1 well production layer,there is no further forward,reduce the harm to other production Wells,gas reservoir development effect has been improved to a certain.