公开(公告)号：US3897827A

公开(公告)日：1975-08-05

申请号：US48965774

申请日：1974-07-18

Applicant: STANDARD OIL CO

Inventor： FELBER BETTY J ,  SMITH LOWELL R

IPC: C09K8/88 ,  E21B43/20 ,  E21B43/22

CPC classification number: C09K8/885 ,  C09K8/887 ,  E21B43/20

Abstract: Improved sweep efficiency in oil-bearing reservoirs having high permeability streaks therein can be effected by first injecting a gel-forming solution consisting essentially of a dichromate activator in a lignosulfonate solution, modified by the presence of an alkali metal halide or an alkaline earth metal halide, such as, for example, sodium chloride or calcium chloride. This system has the advantage of high temperature tolerance and the gelforming characteristics thereof are not appreciably affected either by formation brine or CO2. Gel-forming solutions can be designed requiring from 10 to 2,000 hours to form a gel.

Abstract translation: 可以通过首先在木质素磺酸盐溶液中注入基本上由重铬酸盐活化剂组成的凝胶形成溶液，通过碱金属卤化物或碱土金属卤化物的存在来改性，从而提高其在其中具有高渗透性条纹的含油储层中的扫掠效率 ，例如氯化钠或氯化钙。 该系统具有耐高温性的优点，其凝胶形成特性不受地层盐水或二氧化碳影响。 可以设计凝胶形成溶液需要10至2,000小时以形成凝胶。