低渗油藏裸眼水平井压裂技术及应用

Barehole horizontal well fracturing technology and application for low permeable reservoir

针对大庆外围朝长地区未动用储量属于低渗透扶余油层,采用常规直井开发,单井产能低、开发效益差,为进一步提高低渗透扶余油层开发效果,通过水平井近平衡钻井、裸眼完井,减少了钻井及固井对储层污染,采用打孔管结合油膨胀封隔器工艺进行压裂改造,探索低产低渗透储层有效的开发途径。试油及投产效果表明,低渗透油藏采用近平衡钻井、裸眼完井能有效地保护储层,实施裸眼水平井储层压裂改造能够提高单井日产油,对进一步改善低渗透油藏开发效果有重要意义。

The non-producing reserves in Chaoyanggou and Changchunling blocks in outlying of Daqing Oilfield belong to low permeability Fuyu reservoir, and when apply the conventional vertical wells development technology in these areas, we get low single well productivity and poor development benefit. To further improve its development effect and explore economic exploitation methods in low permeability reservoirs, the horizontal near- balance drilling and open hole completion techniques are adopted to reduce the reservoir pollutions caused by drill- ing and well cementing. What＇ s more, we also combine drilling tures with the oil expansion packer process to carry out fracturing transform. The results of oil production test and commissioning show that near-balance drilling and open hole completion technology can protect reservoirs effectively in low permeability reservoirs. Besides, using open-hole horizontal reservoir fracturing improvement can increase daily oil production of single well, which has important significance to further improve development effect of low permeability reservoirs.