Study on underground gas storage rebuilt from Bannan condensate gas reservoir.pdf

1、Accompany with the rapid development of the economy in our country, theproportion of energy consumption of natural gas is becoming lager and lager.But contrary to this optimistical phenomenon, the question which is theco

2、ntradiction between supply and demand is becoming aculeate increasingly.Now the effective way to resolve this question is to build a gas storage near theterminal consumer. Bannan gas storage is a solution to the natural

3、gascontradiction in Beijing and Tianjin. In order to analyze the feasibility of Bannangas storage, describe the running indexes quantitative, some aspects havedone detail study which is based on the theoretical basis of

4、dynamic and staticcombination, such as the stratigraphic sequence, microfacies, reservoirproperty, 3D geological model, running mechanism and program designingand so on. This research affords a practicable program to the

5、 rebuilding ofBannan gas storage.
　　 1) This study carries out the high resolution sequence stratigraphyresearch, divides BinⅣ oil formation int0 6 layers, carries on the stratigraphiccorrelation to the short-term cy

6、cle, and establishes high resolution sequencestratum of the research area.
　　 2) Based on the Observation and description of B884 cores, it isdetermined that the sedimentary system in the study area is beach-bar, and

7、base on the analysis's foundation of body type and the facies model, thedistribution of plane and vertical distribution is studied in detail,
　　 3) The reservoir heterogeneity of plane, interlayer and intraformationa

8、l isstudied, and establishes research division standard, analyze identification signof intercalation contributing factors in the objective interval, and study thedistribution characteristic; Combines with the flow charac

9、teristic, this researchdivides this reservoir into four kinds of flow units, studies interior distributedrule, and synthesizes the reservoir various aspects characteristic research toselect the appropriate body position

10、for the gas storage construction.
　　 4)Combined with the detailed geological research achievement, this studyestablishes three dimensional fine geological model of Bannan gasstorage(structure model, microfacies model

11、, porosity model, permeabilitymodel), fits the reserves, and calculates effective porosity volume of water andgas sand body in the initial condition.
　　 5) The composition experiment is simulated, such as the CCE and

12、 theCVD and so on, and the composition data is restored to initial state. Combiningdevelopment dynamic model, has carried on the fitting to the production historyof gas reservoir, in this basis, analyzes the saturation d

13、istribution characteristic,calculates residual gas volume, the gas leakage volume and the water bodyinvasion volume.
　　 6) In the foundation of production history fitting, this article does a detailedstudy on the mov

14、ement mechanism, analyzes the influence water body size,the capacity of injection and production, the recovery ratio of condensate oil,etc. on gas storage storehouse movement, establishes operational factorfoundation of

15、the gas storage; Finally, analysis the supply and demandrelationship of natural gas, designs three program, according to the forecastingresults, the appropriate scheme is selected and can provide the theory and thetechni