管外封隔器在高压低渗油藏完井中的应用

胜利油田有许多断块的沙三、沙四段属高压低渗透油藏。在这些油藏钻的井,采用不同的完井方式,产油效果不同。在坨71断块完井8口,其中5口井采用双凝水泥固井,结果日产量低,生产周期短;采用管外封隔器完井,日产量高,生产周期长;采用降失水水泥浆体系固井,日产量适中。文中详细介绍了管外封割器的特点,以及在坨71井的应用情况。

APPLICATION OF EXTERNAL CASING PACKER IN COMPLETION OF HIGH PRESSURE,LOW PERMEABILITY RESERVOIR

Many Sha 3 and Sha 4 intervals in some faulted blocks of Shengli oil field can be cataloged as high pressure and low permeability reservoir. Various completion programs for wells in these reservoir have resulted in different production effects. In 8 wells completed in block Tuo 71, five wells were cemented using double setting cement, resulting in low daily production and short period of production. Completion with external casing packer features high dally production and long period of production while cementing with filtrate reducing cement slurry system results in medium daily production. The feature of external casing packer and its application in well Tuo 71 is discussed in detail in this paper.