松辽盆地致密砂岩气藏水平井多级压裂的现场实践〖HTF〗——以长深D平2井为例

松辽盆地南部长岭气田下白垩统登娄库组致密砂岩气藏具有储层埋藏深、温度高、物性差、地应力高的特点，采用水平井开发和常规的直井压裂开发均难以实现稳产。为最大限度地增加泄油气面积、提高储层动用程度、提高单井产量，在长深D平2井开展了水平井多级压裂开发现场实践：采用裸眼封隔器滑套10级大规模压裂，优化应用压前小型压裂测试、井下微地震和地面电位法压裂监测技术，对10级人工裂缝方位及几何形态进行实时监测。目前，长深D平2裸眼井多级压裂工艺技术的突破，创造了水平井深层气井压裂级数最多、压裂规模最大、平均砂比最高等3项中石油压裂新纪录，并取得了“生产压力高、产量高”的良好效果。该井压裂施工的成功，表明了水平井应用裸眼完井套管压裂具有明显的技术优势，为类似长岭1号气田登娄库组致密砂岩气藏水平井压裂开发提供了有力的技术保障。

Multi-stage frac treatment in horizontal wells of tight sandstone gas reservoirs in the Songliao Basin:A case history of the horizontal well Changshen D2

The tight sand gas reservoirs in the Lower Cretaceous Denglouku Formation in the Changling Gas Field,southern Songliao Basin,are characterized by great burial depth,high temperature,bad petrophysical properties,and high in-situ stress,so steady production here is difficult to achieve by either horizontal well development or conventional vertical-well fracturing treatment.Therefore,in order to expand the oil/gas drainage area,improve the producing degree of pay zones,and enhance the per-well productivity,the...