| In the recent years, Shengping area in-depth has been discovered the massive volcanic rock gas.The exploration result indicated that the gas reserves reach 6772×108m3.It's exploring geological reserves is 57.6×108m3.Because the volcanic rock reservoir is complex and The number of producting wells are few and the knowing degree is low,the other than It has not Moulded technology and the experience in the word.The natural gas field development practice indicated that any type gas well all has a stable production time before the decline of production,Reasonable rate can make the gas well to maintain the long stable productive time .Under different producted method,Different type gas well has different rate of production,and in different production base the rate is different too. At presentthe Shengping gas field has drilled 21 in-depth wells, In which has 6 wells obtaining the industry air current, 15 wells drill in the volcanic rock, Shengshen gas well NO.2 and NO.2-1 are volcanic rock reservoir gas well.with the development of volcanic rock gas feild,it is necessary to do research about method of making reasonable production rate.To maintain the long stable productive time,Obtaining the good economic efficiency.Though analysing producing test of above two wells and actual experience, done the massive theory analysis research, this article drew following conclusion.When the rate is from 2 percent to 2.5 percent ,the stable productive time is from 9 years to 7 years,and the degree of reserve recovery is more than 15 percent. Using the value analogue method forecast, when the rate is 2.3 percent, daily production capacity is 92.3×104m3, the most advisable production is 3.05×108m3 and the stable productive time is 9 years, the cumulative gas production is 31.11×108m3, the degree of reserve recovery is 23 percent.If the production time is 20 years the cumulative gas production will be 57.45×108m3 and the degree of reserve recovery will be 42.6 percents.
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