Research On Experiment Of Sulfur Deposition And Solubility Of PX Gas Reservoir

With the development of the high sulfur gas reservoir,the energy in the reservoir will decrease soon.lt will change the solubility of sulfur in the reservoir,the sulfur will dissolve out as liquid or solid,which will chang the permeability and porosity of the reservoir.The damage which casued by the deposition of sulfur and solubility of sulfur in the sour gas are the two key questions in the development of the production of gas field.Therefor,some conclusion are deduced as follows:(1)Based on the experiment of the stress-sensitivity of matrix rock and fracture rock,the stress-sensitivity of matrix is medium,while the fracture rock is strong.With the effective stress increases,the permeability los of fracture rock is less than that of matrix rock.(2)By making use of the experiment data of stress-sensitivity test,take the relation of permeability and effective stress,the predicction equation of permeability of the matrix and fracture rock in Puguang gas reservoir is estabilished.By using the experiment data of different sulfur saturation and different effective stress,the prection equation of permeability is formed.(3)Based on the experiment of sulfur deposition in the gas reservoir,the change of permeability and weigh under the condition of different gas velocity.After the sulfur deposition in the matrix rock and fracture rock,the permeability of fracture rock decreases very quickly at first,while the permeability of matrix rock decrease very slow.When it comes to the aspect of porosity,the sulfur deposition influence the big hole of fracture rock deeply,while the small hole of matrix rock is changed much more.(4)By the experiment of solubility of sulfur in H2S、CO2、CH4,the solubility of H2S is maximum,followed by CO2,and the smallest is N2.Compare the prediction method of solubility of sulfur,BP neural network and support vector machine,it indicates that the support vector machine will predict the solubility more precise.