申请人:PHILLIPS PETROLEUM COMPANY
公开号:EP0728826A1
公开(公告)日:1996-08-28
A composition is provided which comprises an acrylamide-containing polymer comprising repeat units derived from at least two monomers, a polypropylene glycol, and optionally, a polysaccharide. Also provided is a water-based composition which can be used as drilling fluid wherein the composition comprises calcium chloride, an acrylamide-containing polymer which has repeat units derived from at least two monomers, a polypropylene glycol, and optionally, a polysaccharide. Additionally, a process for using a water-based fluid which has the characteristics of an oil-based fluid as to use in drilling a gumbo shale or highly hydratable formation is provided wherein the process comprises contacting the shale or formation with a composition comprising calcium chloride, an acrylamide-containing polymer, a polypropylene glycol, and optionally, a polysaccharide wherein the acrylamide-containing polymer, polypropylene glycol, and polysaccharide are each present in a sufficient amount to effect the control of fluid loss of a water-based composition.
本发明提供了一种组合物,它包括一种含丙烯酰胺的聚合物(其重复单元至少来自两种单体)、一种聚丙二醇和一种多糖。还提供了一种可用作钻井液的水基组合物,其中该组合物包括氯化钙、含丙烯酰胺的聚合物(其重复单元至少来自两种单体)、聚丙二醇和多糖。此外,还提供了一种具有油基流体特性的水基流体用于钻探胶结页岩或高水合地层的工艺,其中该工艺包括将页岩或地层与包含氯化钙、含丙烯酰胺聚合物、聚丙二醇和多糖的组合物接触,其中含丙烯酰胺聚合物、聚丙二醇和多糖的含量足以控制水基组合物的流体损失。