胜利油田致密砂岩长水平井钻井实践及认识

PRACTICES FOR LONG DISPLACEMENT HORIZONTAL WELLS DRILLING IN TIGHT SANDSTONE RESERVOIRS OF SHENGLI OILFIELD

胜利油田致密油资源量丰富,直井开发具有产能低、初期产量递减快、效益差的特征,为了实现胜利油田致密砂岩的有效动用,长水平井钻井是其高效开发关键技术之一。文章系统的分析了胜利油藏长水平段井钻井地质难点,阐述了长水平段水平井设计理念、钻井液技术、提高钻井时效、轨迹测控和水平井固井等方面的室内、矿场实践做法,分析了存在的问题和下步攻关方向,为胜利油田致密砂岩油藏的有效动用提供了借鉴。

In Shengli Oilfield,the resources of tight sandstone reservoirs are abundant,but low productivity、initial rapid decline of production、low benefit are the principal characters of vertical wells development. In order to improve the development effect of tight sandstone reservoir,the drilling technologies of long displacement horizontal well is one of the effective stimulation treatments. On the basic of drilling- geological difficulties in Shengli tight sandstone reservoir,the drilling engineering design,drilling fluid technology,trajectory control and cementing technology suited for long displacement horizontal well were analyzed. These techniques have obtained good effects in the site,but there are still some problems needing to be resolved,which are the direction of future research.