鱼骨刺水平井改善高阶煤低产区开发效果研究

Study on Exploitation Effect in Herringbone Horizontal Well Improved High Ranked Coal Low Yield Area

目前高庄区块采用的开发方案主要为直井钻井、水力压裂增产开发方式及油管排液、套管采气的抽油机排采工艺,但产气效果不甚理想。面对高庄区块东部高含气量、低渗透率导致的低产井集中、自然上产能力差的现状,借鉴苏庄区块开发经验,采用逆向思维在高庄区块低产直井井区部署新型鱼骨刺水平井。这种新型水平井设计在煤层中钻探多个水平分支,提高了井区煤层的渗透率和连通性,有效解决高庄区块东部区域含气量高但渗透率低导致形成大批低产井的问题,进而整体盘活低产区。

The present exploitation scheme in the Gaozhuang block is mainly vertical well hydraulic fracturing yield increasing mode and drainage techniques of oil pipe liquid drainage,casing gas recovery,but the gas production effect is not so ideal.Faced the high gas content in the eastern part of Gaozhuang block,with concentration of low yield wells resulted in low permeability,poor natural production improving ability status quo,referenced exploitation experiences from the Suzhuang block,through counterfactual thinking to lay out new herringbone horizontal wells in Gaozhuang block low yield vertical wells area.This new typed horizontal wells have designed multiple horizontal branches,thus improved coal seam permeability and connectivity,effectively solved the issue of high gas content with low permeability caused bulk low yield wells in Gaozhuang block eastern part,and then revitalized low yield area as a whole.