CAJ | 학술논문

针对低渗透油藏水平井分段压裂破裂压力高、压裂液窜层及改造成本高等难点,提出了水平井水力喷射与小直径封隔器联作压裂技术,研制了与?139.7 mm(内径为124.3 mm)套管相配套的 K344-108型小直径封隔器,并设计出了压裂钻具组合.该工艺在控制成本的基础上,能防止压裂液窜层,提高分段压裂有效率.在水平井 QP-13井的现场应用表明,该工艺具有施工效率高、增产效果显著的特点,对长庆油田低渗透及超低渗透致密油藏的开发具有重大意义.
침대저삼투유장수평정분단압렬파렬압력고、압렬액찬층급개조성본고등난점,제출료수평정수력분사여소직경봉격기련작압렬기술,연제료여?139.7 mm(내경위124.3 mm)투관상배투적 K344-108형소직경봉격기,병설계출료압렬찬구조합.해공예재공제성본적기출상,능방지압렬액찬층,제고분단압렬유효솔.재수평정 QP-13정적현장응용표명,해공예구유시공효솔고、증산효과현저적특점,대장경유전저삼투급초저삼투치밀유장적개발구유중대의의.
To overcome the difficulties of staged fracturing in horizontal wells in low-permeability reservoirs, such as high break-down pressure, fracture fluid channeling and high reconstruction cost, the fracturing technique combining hydraulic jet with small-diam-eter packer is brought forward. The small-diameter K344-108 type packer is developed to match ?139.7 mm casing (internal diameter is 124.3 mm) and the fracturing-drilling tool assembly is designed. Studies have shown that on the basis of cost control, the technique can prevent fracture fluid from channeling and improve the efficiency of staged fracturing. According to the treatment to the horizontal well QP-13, the technique is significant for developing low-permeability and ultralow-permeability tight oil reservoirs in Changqing oilfield with its high operating efficiency and observable stimulating ability.