天然气工业
天然氣工業
천연기공업
NATURAL GASINDUSTRY
2009年
10期
80-82
,共3页
气层%流动速度%临界速度%气体%地层损害%实验%评价%方法
氣層%流動速度%臨界速度%氣體%地層損害%實驗%評價%方法
기층%류동속도%림계속도%기체%지층손해%실험%평개%방법
gas layer%flow velocity%critical velocity%gas%layer damage%experiment%evaluation%method
气体通过气层岩石流动的流速敏感性评价实验结果是确定气藏合理采气速度的重要依据.目前的气层岩石流速敏感性的评价方法均没有考虑气体通过岩石的滑动效应对渗透率的影响.为此根据气体通过岩石孔道中的流动特性,提出了气体通过岩石流动的流速敏感性的理论,介绍了气层岩石流速敏感性评价实验的新方法,包括气层岩石流速敏感性评价实验的步骤以及临界流速和速敏损害程度的确定.该新方法考虑了气体通过岩石的滑动效应对渗透率的影响,利用气体在不同流速下流过岩石的渗透率的变化来直接评价岩石的流速敏感性,这避免了目前的气层岩石流速敏感性的评价方法的不足.选取平湖地区某凝析气藏的岩样进行流速敏感性的评价,其实验结果表明新方法是可行的.
氣體通過氣層巖石流動的流速敏感性評價實驗結果是確定氣藏閤理採氣速度的重要依據.目前的氣層巖石流速敏感性的評價方法均沒有攷慮氣體通過巖石的滑動效應對滲透率的影響.為此根據氣體通過巖石孔道中的流動特性,提齣瞭氣體通過巖石流動的流速敏感性的理論,介紹瞭氣層巖石流速敏感性評價實驗的新方法,包括氣層巖石流速敏感性評價實驗的步驟以及臨界流速和速敏損害程度的確定.該新方法攷慮瞭氣體通過巖石的滑動效應對滲透率的影響,利用氣體在不同流速下流過巖石的滲透率的變化來直接評價巖石的流速敏感性,這避免瞭目前的氣層巖石流速敏感性的評價方法的不足.選取平湖地區某凝析氣藏的巖樣進行流速敏感性的評價,其實驗結果錶明新方法是可行的.
기체통과기층암석류동적류속민감성평개실험결과시학정기장합리채기속도적중요의거.목전적기층암석류속민감성적평개방법균몰유고필기체통과암석적활동효응대삼투솔적영향.위차근거기체통과암석공도중적류동특성,제출료기체통과암석류동적류속민감성적이론,개소료기층암석류속민감성평개실험적신방법,포괄기층암석류속민감성평개실험적보취이급림계류속화속민손해정도적학정.해신방법고필료기체통과암석적활동효응대삼투솔적영향,이용기체재불동류속하류과암석적삼투솔적변화래직접평개암석적류속민감성,저피면료목전적기층암석류속민감성적평개방법적불족.선취평호지구모응석기장적암양진행류속민감성적평개,기실험결과표명신방법시가행적.
The result of sensitivity evaluation experiment for flow velocity of gas flowing through rocks in gas layers is used for determining a reasonable gas recovering rate of a gas reservoir. The existing evaluating methods do not take into account of the sliding influence on the permeability when gas is flowing through rocks. On basis of the flowing characteristic of gas through rock channels, this paper puts forward a theory on the sensitivity of gas flow velocity through rocks in gas layers, and introduces a novel method for experimental evaluation on it, including experiment procedures and the way of determining the critical flow velocity and the degree of velocity-sensitivity damage. Upon taking into account of the influence of slide effect on the permeability while gas flows through rocks, this novel method can be used for evaluating the sensitivity of gas flow velocity directly according to the change of permeability while gas flows through different rocks, which makes up for the shortage of the existing evaluation methods. This novel method was proved to be feasible via evaluating flow velocity sensitivity on rock samples selected from a condensate gas reservoir in the Pinghu region.
