Method for determining water drive gas reservoir parameters under conditions of rock pore shrinkage and bound water expansion
A technology of bound water and water driving gas, which is applied in the direction of earthwork drilling, wellbore/well components, production fluid, etc. It can solve the problems of small application range, harsh application conditions, and unsuitability, and achieve the effect of fast and simple data acquisition
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[0065] The method for determining the parameters of water drive gas reservoirs under the conditions of rock pore shrinkage and irreducible water expansion includes the following steps in sequence:
[0066] S1. Transform the material balance equation of the water drive gas reservoir considering the shrinkage of rock pores and the expansion of bound water into the material balance equation after deformation;
[0067] S2. Substituting the Van Everdingen-Hurst water intrusion calculation formula into the deformed material balance equation to obtain the water intrusion material balance indicating curve equation;
[0068] S3. Obtain the cumulative gas production G of the gas reservoir to be tested from the oilfield production data p , the cumulative water production of the gas reservoir to be tested W p , the gas original volume coefficient B of the gas reservoir to be tested gi and the gas volume coefficient B of the gas reservoir to be tested g , the original pressure P of the ...
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