【作者】 邱树立；

【导师】 施尚明；

【作者基本信息】 大庆石油学院 ， 矿产普查与勘探， 2008， 硕士

【摘要】 随着深层火山岩气藏的深入开发,急需开展深层气藏气井递减规律的研究,对递减规律的研究多数是利用实际生产数据确定递减参数的方法,其中以对双曲线递减的研究最多。利用油气藏实际生产数据确定递减参数,前人已提出了许多方法,主要可分为H.C.Slider等提出的曲线位移法,C.U.IKOKU等提出的试差法、J.M.Campbell等提出的典型曲线拟合法、二元回归法、插值法、迭代法、非线性拟合法、双重试凑法、级数展开法、直线分析法、统计分析筛选法等。本文主要利用J.J.Arps提出的递减规律的研究方法,通过深层砂砾岩、火山岩气藏的开发现状及开发特征;产量随时间的变化关系,累积产量随时间的变化关系,瞬时产量和累积产量的变化关系;确定气井递减类型与初始递减率,进而确定气田递减规律;根据递减规律,进行气田动态分析和产量预测。通过计算最终得出所研究区块中的井,其产量趋势可以分为四类,衰竭递减,指数递减,双曲线递减,还有一种Wengcycle模型。其中属于Wengcycle模型的气井产气量是处于上升趋势或稳产期。具体结果为15口气井中有三口井如果按原来的生产方式继续生产还将处于稳定期或刚要开始进入递减期,此三口井只能用Wengcycle模型进行计算。而其余12口井在现有生产方式下已经处于递减期,有一口井是双曲线递减,五口井是衰竭递减,六口井指数递减。在用递减模型进行计算过程中,发现每一口井的生产时间、产量与累计产量的关系不是固定的,是随着生产的进行而动态变化的。更多还原

【Abstract】 With the additional development of deep volcanic gas reservoir ,it’s urgently to take the study of gas well(production,pressure) decline rule of deep gas resercoir . The normal study method of decline rule is utilizing the actual productive data to define the decline parameters , which is log-log graph decline rule mostly. Predecessors have submitted many methods to define the decline parameters through utilizing the actual productive data, including mainly the H.C.Slider’s curve offsetting method ,C.U.IKOKU’s try and error method , J.M.Campbell’s type curve matching method ,bivariateregression analysis , interpolation method , iteration method , nonproportionality matching method , duplex cut-and-try method , series expansion method , straight-line analysis method , filter after statistics and analysis method etc.The major study method of decline rule used in this article is presented by J.J.Arps , which define the (production,pressure) decline type and initial decline rate of gas well and then define the gas field’s decline rule by means of the development state and character of deep pebbly sandstone and volcanic rock , the alternation relation between production and time , cumulative production and time , instantaneous production and time. By means of the decline rules , take the gas field’s dynamic analysis and production prediction .The final computational solution divide the production tendency of wells in research zone into four types , they are depletion decline , exponential decline , hyperbolic decline and a kind of model of Wengcycle of which gas well production is in the rising stage or stabilized production stage . The concrete result is 3 wells of 15 wells will be in the stabilized production stage or go into the decline stage if they continue to product with the old productive pattern , the 3 wells can only calculate with Wengcycle model . And the other 12 wells which producted with the current productive pattern have be in the decline stage , the one is hyperbolic decline , the 5 is depletion decline and the 6 is exponential decline .In the process of caculating with decline model , the relations of every well among production time,production and cumulative production are not permanent , but they are dynamic alternation with the production process .更多还原