CAJ | 학술논문

生产数据分析是近年来油藏工程的研究热点之一,它以不稳定渗流理论为基础,集常规油藏工程分析和现代试井分析之优势形成新的数学模型,既能合理预测油气井产量递减又能有效评价油气层物性.通过求解封闭地层水平井的三维不定常渗流问题,可得普通水平井的Agarwal-Gardner型产量递减曲线以及产量递减导数曲线理论图版.分析表明,Agarwal-Gardner型产量递减曲线可以分成2个阶段,前一段是不稳态递减段,其导数曲线不归一,而后一段为拟稳态递减段,其导数曲线归一,接近于Arps调和递减趋势;对于均质储集层,水平井的垂向位置对中长期产量递减规律影响很弱,可以忽略.矿场实例说明在已知生产数据的条件下利用该结果可直接评价储集层特性,并对水平井中长期产能进行有效预测.图4参14
생산수거분석시근년래유장공정적연구열점지일,타이불은정삼류이론위기출,집상규유장공정분석화현대시정분석지우세형성신적수학모형,기능합리예측유기정산량체감우능유효평개유기층물성.통과구해봉폐지층수평정적삼유불정상삼류문제,가득보통수평정적Agarwal-Gardner형산량체감곡선이급산량체감도수곡선이론도판.분석표명,Agarwal-Gardner형산량체감곡선가이분성2개계단,전일단시불은태체감단,기도수곡선불귀일,이후일단위의은태체감단,기도수곡선귀일,접근우Arps조화체감추세;대우균질저집층,수평정적수향위치대중장기산량체감규률영향흔약,가이홀략.광장실례설명재이지생산수거적조건하이용해결과가직접평개저집층특성,병대수평정중장기산능진행유효예측.도4삼14
The production data analysis is one of hot spots of reservoir engineering recently,which combines conventional reservoir engineering analysis and modern well test analysis.Based on the theory of transient porous flow,the analysis provides a mathematical model,which not only reasonably predicts the production decline of oil or gas well but also effectively evaluates the physical properties of reservoirs.Theoretical charts of Agarwal-Gardner production decline curves and derivative curves for common horizontal wells are presented by solving the transient 3D porous flow in the bounded reservoir.The Agarwal-Gardner curves can be divided into two stages:the derivatives are disperse in the early transient decline stage and drawn to Arps harmonious decline in the late pseudo-steady state.The influence of the vertical location of horizontal wells on production decline in the mid-long term is negligible in a homogenous reservoir.A field example illustrates that,given the production data,the results in this article can be directly used to evaluate the reservoir characteristics and effectively forecast the long-term productivity for horizontal wells.