页岩Ⅰ区块储层布井方案及优选

Pattern of Wells and Optimization in the Reservoir of ShaleⅠBlock

页岩Ⅰ区块页岩气储量丰富,勘探开发前景较好。井网部署在提高单井控制储量和全区累产量中发挥着巨大作用。为了能最大限度的开发利用资源,结合该区块的地质特征,主要采用合理采气速度法、规定单井产能法、经济极限法等,确定页岩Ⅰ区块生产井井距,同时借鉴该区块已有生产井的水平段长度,最终设计出四种井网部署方案,通过数值模拟对四套开发方案进行生产预测,最后优选出一套开发方案:井距400排距400水平段长度1500m,新布39口水平井投入开发,累计产气量达211.8*108m3,采出程度为43.6%。

Shale I block with huge shale - gas reserves, have good prospect of exploration and development. The well pattern deployment plays a significant role in improving the eontrol reserves of single well and the aecumulation of the whole region. In order to maximize the development and utilization of resources, combining the geological features of the block, mainly use reasonable gas recovery rate method, the provisions of the single well production capacity, economic limits, etc. To determine the well spacing of the production well in the shale I block, at the same time, reference the horizontal length of the production well in this section, Finally, a set of development scheme is optimized： well spacing and row spacing all set at 400 meters and horizontal section length set at 1500 meters, new 39 horizontal well invest for development, the accumulated gas output reached 211.8 ＊ 10^8m^3 and the recovery degree was 43.6%.