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合水长6油藏储层渗透率0.23 mD、孔隙度10.4%,是典型的致密砂岩油藏,隔夹层厚度较小,应力差仅2.8 MPa,压裂改造难度大,常规压裂改造受限,储层改造不充分,投产后单井产能低。在充分研究油井自身条件及裂缝扩展规律的前提下,提出利用定向井具有一定的井斜和方位角,在油层内与最大主应力方向成一定夹角,通过优化压裂施工参数,利用斜井多段压裂在层内形成多条独立裂缝,实现储层充分改造,扩大油井泄流体积,提高单井产量。
The reservoir permeability of Changshui 6 reservoir is 0.23 mD, with a porosity of 10.4%. It is a typical tight sandstone reservoir with a small thickness of intercalation and a stress difference of only 2.8 MPa. It is difficult to reconstruct fracturing, , Inadequate reservoir reform, single well production capacity is low. On the premise of fully studying the conditions of oil well and the rule of crack propagation, it is proposed to use the directional well to have a certain inclination and azimuth, and to form an included angle with the direction of the maximum principal stress in the oil layer. By optimizing the fracturing parameters and using the inclined well Multi-stage fracturing in the formation of multiple independent cracks, to fully transform the reservoir to expand the well discharge volume and improve single-well production.