On the basis of Clustering theory,Q cluster is applied to predict source *** coefficient and similarity coefficient is calculated,and the shortest distance method is used to analyse the oil shale samples, Then,a predi...
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On the basis of Clustering theory,Q cluster is applied to predict source *** coefficient and similarity coefficient is calculated,and the shortest distance method is used to analyse the oil shale samples, Then,a prediction map of the oil sources distribution is drawns with Q point-group *** by the analy sis of organic geochemistry distribution in YB area,the location of source rock is judged.
Cyclic waterflooding is a kind of waterflood technique,which can improve the waterflood efficiency in low-permeability and fracture-porosity reservoir by changing periodically injected water volume,this article gives ...
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Cyclic waterflooding is a kind of waterflood technique,which can improve the waterflood efficiency in low-permeability and fracture-porosity reservoir by changing periodically injected water volume,this article gives the principle and the applied conditions of cyclic waterflooding,and analyses the factors that affect the effect of cyclic waterflooding detailedly,analyzes in detail factors affecting cyclic water-flooding *** folluwing conclusions,are drawn:the earlier the cyclic waterflooding process,the better the effectiveness,but the optimal time should be determined by numerical simulations;the longer the cy-clc of the *** less the permeability;the shorter the cycle。the less the formation elasticity;the betterthe effects, the less the pay zone uniformity;the effectiveness will be the best at proper capillary *** the ratio of vertical permeability to horizontal one is 0.5,the process effects will be the best;Carrying out nonsym-metrical injection-production process and oil production in turn will get the best cyclic waterflooding effects.
Compared with conventional gas reservoir, the complexity and particularity of geologic characteristic and exploitation feature in high sulfur gas reservoir leads to its development technique difficult, strict required...
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Compared with conventional gas reservoir, the complexity and particularity of geologic characteristic and exploitation feature in high sulfur gas reservoir leads to its development technique difficult, strict required of safety condition and high cost of *** is some problem in the procedure of exploitation,such as the phenomenon of sulfur deposition in layer and wellbore,the phenomenon of fracture closure,the hyper toxicity of hydrogen sulfur, strong corrosiveness,the formation of hydrate in wellbore,the phenomenon that the component concentration of hydrogen sulfur in produced gas is move upward as well as the abnormality of wellhead pressure after the gas well is shut ***'s more,these problems have great effect on regular production of high sulfur fractured gas reservoir.
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