浅薄层稠油油藏水平井蒸汽吞吐注汽参数分析

随着稠油开采技术的发展,水平井在浅层稠油开采上的应用规模逐渐扩大。为高效开发浅薄层稠油油藏,应用数值模拟方法及灰度关联分析方法研究了浅薄层稠油油藏蒸汽吞吐注汽参数的敏感性。研究结果表明,水平井蒸汽吞吐注汽参数敏感性排序为:注汽强度>蒸汽干度>焖井时间>注汽速度。并在此基础上,优化了某浅薄层油藏的注汽参数,优化结果为注汽强度14 t/m,蒸汽干度大于等于0.5,焖井时间为2～4 d,注汽速度300 t/d时,每周期注汽量较上一周期递增10%左右。该研究成果对此类油藏的高效开发具有重要的意义。

The Study on Injection Parameters About Steam Huff and Puff of Horizontal Well in Shallow and Thin Heavy Oil Reservoir

With the development of heavy oil recovery technology, the scale of horizontal well application in shallow heavy oil exploitation gradually expanded. For the efficient development of shallow thin heavy oil reservoir, numerical simulation and gray association analysis were used to study the sensitivity of injection parameters about steam huff and puff of horizontal well in shallow and thin heavy oil reservoir. Research results show that the sensitivity descending order of injection parameters about steam huff and puff of horizontal well is as follows: steam injection intensity, dryness fraction of steam, soak time, steam injection rate. And on this basis, optimizing the steam injection parameters, optimization results are as follows: Steam injection intensity is 14t/m, steam dryness is greater than or equal to 0.5, soak time is 2 to 4 days, steam injection rate is 300t/d, each cycle steam injection volume increases 10% compared with the previous cycle. The research has important significance on the efficient development of such reservoirs.