油气藏评价与开发
油氣藏評價與開髮
유기장평개여개발
2012年
6期
24-27
,共4页
陈丽群%孙雷%张立强%周登洪
陳麗群%孫雷%張立彊%週登洪
진려군%손뢰%장립강%주등홍
干气气藏%超高压%气体偏差因子%动态分析
榦氣氣藏%超高壓%氣體偏差因子%動態分析
간기기장%초고압%기체편차인자%동태분석
dry gas reservoir%overpressure%gas Z-factor%dynamic analysis
地层条件下气体的偏差因子是用来计算气藏储量、进行动态分析的关键数据,通常使用实验法、图版法、经验公式法、状态方程法进行确定。但许多超高温高压实验研究表明,图版法及一些经验公式计算方法得到的结果与实验值相差很大,有的误差甚至超过了20%。针对超高压干气气藏气体偏差因子算法问题,根据调研共选择了六种方法(PR、SRK、SW、DAK、DPR、HY)分别进行计算,计算结果与实验值进行对比,结果发现SRK模型、DAK模型、DPR模型能很好地适应高温高压条件,可以作为超高压干气气藏气体偏差因子的算法。
地層條件下氣體的偏差因子是用來計算氣藏儲量、進行動態分析的關鍵數據,通常使用實驗法、圖版法、經驗公式法、狀態方程法進行確定。但許多超高溫高壓實驗研究錶明,圖版法及一些經驗公式計算方法得到的結果與實驗值相差很大,有的誤差甚至超過瞭20%。針對超高壓榦氣氣藏氣體偏差因子算法問題,根據調研共選擇瞭六種方法(PR、SRK、SW、DAK、DPR、HY)分彆進行計算,計算結果與實驗值進行對比,結果髮現SRK模型、DAK模型、DPR模型能很好地適應高溫高壓條件,可以作為超高壓榦氣氣藏氣體偏差因子的算法。
지층조건하기체적편차인자시용래계산기장저량、진행동태분석적관건수거,통상사용실험법、도판법、경험공식법、상태방정법진행학정。단허다초고온고압실험연구표명,도판법급일사경험공식계산방법득도적결과여실험치상차흔대,유적오차심지초과료20%。침대초고압간기기장기체편차인자산법문제,근거조연공선택료륙충방법(PR、SRK、SW、DAK、DPR、HY)분별진행계산,계산결과여실험치진행대비,결과발현SRK모형、DAK모형、DPR모형능흔호지괄응고온고압조건,가이작위초고압간기기장기체편차인자적산법。
Gaseous Z-factor is the key data that is used to estimate the gas reserve and carry out dynamic analysis under the stratigraphic condition. And it is always gained by experiments, Z-factor charts, empirical formula and state equations. However, many ultrahigh temperature and overpressure experiments show that the estimated results of Z-factor charts and some empirical formula vary widely from the experimental ones. Some errors are even more than 20 %. Aiming at the algorithm of Z-factor of overpressure dry gas reservoir and based on the research results, this paper selected six methods in total, including PR, SRK, SW, DAK, DPR and HY. The estimated results of these six methods were compared with those of experiments. The results showed that model SRK, DAK and DPR could adapt well to the conditions of ultrahigh temperature and overpressure. They could be used to estimate the Z-factor of overpressure dry gas reservoir.