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    • 2. 发明申请
    • METHODS OF LIMITING LEAK OFF AND DAMAGE IN HYDRAULIC FRACTURES
    • 限制液压裂缝泄漏和损伤的方法
    • WO2009150560A1
    • 2009-12-17
    • PCT/IB2009/052257
    • 2009-05-28
    • SCHLUMBERGER CANADA LIMITEDSERVICES PETROLIERS SCHLUMBERGERSCHLUMBERGER HOLDINGS LIMITEDSCHLUMBERGER TECHNOLOGY B.V.PRAD RESEARCH AND DEVELOPMENT LIMITEDHUTCHINS, Richard D.LADVA, Hemant K.WILLIAMSON, DonDANIEL, Sylvie
    • HUTCHINS, Richard D.LADVA, Hemant K.WILLIAMSON, DonDANIEL, Sylvie
    • C09K8/68C09K8/60
    • C09K8/68C09K8/685C09K8/88C09K2208/26C09K2208/30
    • Methods for treating a formation penetrated by a wellbore which improves fluid loss control during treatment. In some aspects, the treatments include preparing an aqueous fluid including one or more water inert degradable polymers and an optional viscosifier, injecting the aqueous fluid into the wellbore at a pressure equal to or greater than the formation's fracture initiation pressure, and thereafter injecting into the wellbore a proppant laden fluid at a pressure equal to or greater than the formation's fracture initiation pressure. The water inert degradable polymer may be a polymer such as an emulsion polymer or a latex polymer. Some methods of the invention use a fluid which may have a normalized leak off coefficient (C w /sqrt(K)) equal to or less than about 0.0022, 0.0014, or 0.0010. A conventional fluid loss additive may or may not be used in conjunction with the treatment fluid and/or the proppant laden fluid. The water inert degradable polymer may or may not substantially enter formation pores. In another aspect, methods for reducing matrix damage to a formation during a treatment operation include preparing an aqueous treatment fluid formed of at least one water inert degradable polymer, and injecting the fluid at a pressure equal or greater than the formation's fracture initiation pressure.
    • 用于处理由井眼穿透的地层的方法,其改善处理期间的流体损失控制。 在一些方面,处理包括制备包含一种或多种水惰性可降解聚合物和任选的增粘剂的含水流体,其在等于或大于地层断裂开始压力的压力下将水性流体注入井眼,然后注入 在等于或大于地层断裂开始压力的压力下钻井支撑剂载液。 水惰性可降解聚合物可以是聚合物,例如乳液聚合物或胶乳聚合物。 本发明的一些方法使用可具有等于或小于约0.0022,0.0014或0.0010的归一化泄漏系数(Cw / sqrt(K))的流体。 常规的流体损失添加剂可以或可以不与处理流体和/或负载载体一起使用。 水惰性可降解聚合物可能基本上不会进入地层孔隙。 在另一方面,用于在处理操作期间减少对地层的基质损伤的方法包括制备由至少一种水惰性可降解聚合物形成的水性处理流体,并且在等于或大于地层断裂开始压力的压力下注入流体。