The Adaptability Research Of Steam Stimulation In Multizone Heavy Oil Reservoir

At present,the world oil consumption demand is increasing year by year,consumption growth in developing countries has become the main part of the growth of the world oil demand.The demand for oil compared to the 1980 s,growth was mainly developing countries.China is now facing the status of declining conventional oil reserves and increasing demand for oil.And heavy oil has a large proportion in our country oil and gas resources,steam huff and puff thermal recovery method as a mature way to exploit heavy oil,has achieved good results in the development of heavy oil reservoir.With the advantages of simple process and low cost,more and more countries have paid attention to it.However,the exploitation of this method has certain limit conditions,geological conditions and process parameters have some effect on the development effect.Therefore,it is necessary to study the influence of related factors on ultimate recovery ratio.In this paper,aiming at the A oil field,in view of the involved in the process of steam stimulation is mainly related to the influence of parameters on the development effect were studied.First,through the geological characteristics such as structural characteristics,reservoir physical properties and fluid properties,the multi-objective reservoir rod of the target oilfield is established by the CMG software star module,the model adopts the steam huff and puff development of the orthogonal grid,and analyzes the main factors affecting heavy oil exploitation.The influence of relevant parameters on the development effect,mainly considered four aspects,is permeability,steam temperature,steam quality and steam injection rate.Through the study of the development effect comparison,the regular understanding of steam huff and puff development is obtained,which has a certain reference significance to the development of the block heavy oil reservoir and the improvement of steam stimulation.