| Swift increase with the ratio in new reserves of zhongyuan oilfield ,the deep seated gas pool plays very important role in Zhongyuan oilfield gas production .From information of gas exploitation of Zhongyuan oilfield or foreign gas-pools, deep seated gas pools in general have characters such as complicated tectonics, mini block, long gas interval, low gas abundance& anisotropic reservoir and always can not be exploited separately. Because of bad geological conditions the production of deep seated gas pools and pressure can not keep stable and drops down quickly. Hence, researches were urgently and necessarily proposed to find methods & technologies to advance gas recovery and keep stable gas production.Based on extensive data of deep seated gas pool production and statistics, using numerical simulation, introducing anew concept of No-physical-unit production, this article studied the deep seated gas pool-characters, exploitation state, total reservoir and potential reservoir of Qiaokou area, Baimiao area, Hubuzhai area and block 67 of Pucheng area. Some new methods and advanced technologies were preferred to keep production and enhance recovery in deep seated gas pool. I t also optimized deep-seated-gas exploitation parameters and production ruler. Perforation technologies and fracturing technics were promoted in this article.Researches said that deep-seated-gas pools of Zhongyuan oilfield are bad in physical character ,low in gas production, quick in production-dropping ,and their production mode are multi-pay-production .To keep prolonged stable production, three- replacement method was preferred . In addition, this article also studied the opportunity of replacement between pays by using numerical simulation, found out reasonable sies of pay pipe & nipples ,studied the technics of fracturing & flowing and presented promotion technologies suitable with the characters of deep gas pools of Zhongyuan oilfield to advance production. |
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