（1）生产水气比判别方法气井一般在在生产初期产水量相对小且较为稳定，生

（1）生产水气比判别方法<br>气井一般在在生产初期产水量相对小且较为稳定，生产水气比较小并且存在一个上限值，在这个阶段气井产出水来源主要为为地层中凝析水；随着气井不断的生产，气井产水量和生产水气比急剧上升，产水量上升，表明气井这时边、底水可能已经侵入到气藏当中，为了准确判定气井出水来源，还要结合其他判定方法综合分析。<br>（2）产出水的矿化度判别方法<br>储层中地层水与凝析水矿化度一般不同，边、底水氯离子含量一般远大于凝析水中氯离子含量。所以能够依据气井产出水样的检测，判定气井产出水类型以及来源，可以提前预测气井水侵的发生来源。实际矿场气藏地质条件和气井生产情况较为复杂，此方法一般需要结合其它方法和气井工作液返排率来综合判定气井出水来源。<br>（3）水性判定法<br>尖北气田地层中凝析水的矿化度、密度相对较低，由于气体当中酸性成分溶解到凝析水中，因此凝析水PH值相对偏酸性，水型主要为Na2So4型；工程液 （主要为钻井液与酸液）当中含有大量的其他添加物，矿化度、密度相对较大，钻井液PH值通常为强碱性，酸液PH值通常为强酸性；气藏中地层水矿化度与密度主要介于凝析水及工程液之间，和凝析水矿化度相比明显偏高，水型主要为CaCl2型。<br>（4）气藏生产动态判定方法<br>①气藏气井生产无水采气期较短，甚至没有无水采气期。气井开井生产立刻出水并且产水量、水气比较为稳定，表明气井生产过程中产出的水主要是地层当中的凝析水。<br>②随着气井的不断生产，地层压力逐渐下降，气井产水量逐渐开始增加，但是增量相对较小，气井产气量一直相对比较稳定，表明由于地层压力降低，气井周围形成压降漏斗，井筒附近位置束缚水逐渐开始流动，气井产出水来源主要为凝析水和束缚水。<br>③气井生产一段时间之后，气井产水量急剧上升，产气量开始出现大幅的下降，表明因为气层中压力下降，使地层中边、底水侵入到气藏当中并且己经突破到井底，造成气井产水量增加，气井的产量大幅度下降。气井产出水来源主要为边、底水。<br>（5）油压的下降速度判别方法<br>当气井发生边、底水水侵的时候，此时气井产水量较大，井筒压耗增加，严重的时候甚至形成井底积液，井口压力下降幅度较为明显，从气井生产动态上看，气井井口压力值下降幅度较大并且速度十分快。

（1）生产水气比判别方法气井一般在在生产初期产水量相对小且较为稳定，生产水气比较小并且存在一个上限值，在这个阶段气井产出水来源主要为为地层中凝析水；随着气井不断的生产，气井产水量和生产水气比急剧上升，产水量上升，表明气井这时边、底水可能已经侵入到气藏当中，为了准确判定气井出水来源，还要结合其他判定方法综合分析。（2）产出水的矿化度判别方法储层中地层水与凝析水矿化度一般不同，边、底水氯离子含量一般远大于凝析水中氯离子含量。所以能够依据气井产出水样的检测，判定气井产出水类型以及来源，可以提前预测气井水侵的发生来源。实际矿场气藏地质条件和气井生产情况较为复杂，此方法一般需要结合其它方法和气井工作液返排率来综合判定气井出水来源。（3）水性判定法尖北气田地层中凝析水的矿化度、密度相对较低，由于气体当中酸性成分溶解到凝析水中，因此凝析水PH值相对偏酸性，水型主要为Na2So4型；工程液 （主要为钻井液与酸液）当中含有大量的其他添加物，矿化度、密度相对较大，钻井液PH值通常为强碱性，酸液PH值通常为强酸性；气藏中地层水矿化度与密度主要介于凝析水及工程液之间，和凝析水矿化度相比明显偏高，水型主要为CaCl2型。（4）气藏生产动态判定方法①气藏气井生产无水采气期较短，甚至没有无水采气期。气井开井生产立刻出水并且产水量、水气比较为稳定，表明气井生产过程中产出的水主要是地层当中的凝析水。②随着气井的不断生产，地层压力逐渐下降，气井产水量逐渐开始增加，但是增量相对较小，气井产气量一直相对比较稳定，表明由于地层压力降低，气井周围形成压降漏斗，井筒附近位置束缚水逐渐开始流动，气井产出水来源主要为凝析水和束缚水。③气井生产一段时间之后，气井产水量急剧上升，产气量开始出现大幅的下降，表明因为气层中压力下降，使地层中边、底水侵入到气藏当中并且己经突破到井底，造成气井产水量增加，气井的产量大幅度下降。气井产出水来源主要为边、底水。（5）油压的下降速度判别方法当气井发生边、底水水侵的时候，此时气井产水量较大，井筒压耗增加，严重的时候甚至形成井底积液，井口压力下降幅度较为明显，从气井生产动态上看，气井井口压力值下降幅度较大并且速度十分快。<br>

(1) Discrimination method of production water-gas ratioGenerally, the water yield of gas wells is relatively small and stable at the initial stage of production, and the produced water vapor is relatively small and has an upper limit value. At this stage, the water produced by gas wells mainly comes from condensate water in the formation; With the continuous production of gas wells, the water production rate and water-gas ratio of gas wells increase sharply, and the water production rate increases, which indicates that the edge and bottom water of gas wells may have invaded into the gas reservoir at this time. In order to accurately determine the water source of gas wells, comprehensive analysis should be combined with other determination methods.(2) Discrimination method of salinity of produced waterThe salinity of formation water and condensate water in reservoir is generally different, and the chloride ion content in edge and bottom water is generally much higher than that in condensate water. Therefore, the type and source of water produced by gas wells can be determined according to the detection of water samples produced by gas wells, and the source of water invasion in gas wells can be predicted in advance. The actual geological conditions of field gas reservoir and gas well production are complex, so this method generally needs to combine other methods and gas well working fluid backflow rate to comprehensively determine the gas well water source.(3) Water-based judgment methodThe salinity and density of condensate water in the formation of Jianbei gas field are relatively low. Because the acidic components in the gas dissolve into the condensate water, the PH value of the condensate water is relatively acidic, and the water type is mainly Na2So4. Engineering fluids (mainly drilling fluids and acid fluids) contain a large amount of other additives, with relatively high salinity and density. The PH value of drilling fluids is usually strongly alkaline, while that of acid fluids is usually strongly acidic. The salinity and density of formation water in gas reservoir are mainly between condensate water and engineering fluid, which is obviously higher than that of condensate water, and the water type is mainly CaCl2 type.(4) Method for judging production performance of gas reservoir① The waterless gas production period of gas wells in gas reservoirs is short, and there is even no waterless gas production period. The water produced in gas well production immediately and the water yield and water-gas ratio are stable, which indicates that the water produced in gas well production is mainly condensate water in the formation.② With the continuous production of gas wells, the formation pressure gradually decreases, and the water production of gas wells gradually begins to increase, but the increment is relatively small, and the gas production has been relatively stable, indicating that due to the decrease of formation pressure, a pressure drop funnel is formed around the gas wells, and bound water near the wellbore gradually begins to flow, and the water produced by gas wells mainly comes from condensate water and bound water.③ After a period of gas well production, the water yield of gas well rises sharply, and the gas production begins to drop sharply, which indicates that the edge and bottom water in the formation intrudes into the gas reservoir and has broken through to the bottom of the well because of the pressure drop in the gas reservoir, resulting in an increase in water yield and a significant decline in gas well production. The main sources of produced water in gas wells are edge and bottom water.(5) Method for judging the falling speed of oil pressureWhen edge and bottom water invasion occurs in a gas well, the water yield of the gas well is large, the wellbore pressure loss increases, and even the bottom hole effusion is formed in severe cases, and the wellhead pressure decreases obviously. From the production performance of the gas well, the wellhead pressure decreases greatly and rapidly.