论文详情

高密度低损害压井液体系

石油钻采工艺

2002年 24卷第6期

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Title

KILLING FLUID SYSTEM OF HIGH DENSITY AND LOWDAMAGE

作者

杨小平周海王纪春郭元庆

Authors

Yang Xiaoping Zhou Hai Wang Jichun Guo Yuanqing

单位

大港油田集团公司, 天津大港 300280

Organization

Dagang Oilfield Group Company

摘要

为了解决修井、射孔等作业过程中压井液的漏失、滤失问题,以及由此造成的水敏、水锁、固相堵塞、乳液堵塞等地层损害,提出并研制了一种含可溶性固相的暂堵型高密度压井液配方体系。该体系主要由XC聚合物和YDC-LN助剂以及可水溶性加重剂组成。通过配方筛选和室内模拟试验研究,结果表明该体系稳定性好,耐温超过105℃,滤失量小,抑制性强,岩心损害率小于20%,而且具有密度可调、返排率高等特点;与自来水和油田污水的配伍性好,应用简单、方便。

Abstract

A well killing fluid of high density containing soluble bridging-plugging solids and of temporary plugging is used to prevent filtration or loss circulation of the work-over fluid into the formation during workover or perforating operations, so as to avoid the reservoir damages arising from water and solids blocking, water sensitivity and emulsion plugging, etc.It comprises XC polymer, YDC-LN additive and water soluble weighting agent.Formula selection and laboratory simulating tests show that this system has good stability, higher temperature tolerance over 105℃, lower filtration and stronger inhibition, and the core damaging ratio is below 20%.In addition, its density is easily adjustable and it can be easily displaced after servicing, and it has good compatibility with fresh water and the produced-water in the Oilfield.This sy stem is easy and convenient for field using.

关键词：

压井液; 修井液; 加重剂; 低损害; 配方; 暂堵; 高密度;

Keywords:

killing fluid; workover fluid; weighting fluid; low damage; formulation; temporary plugging; high density;

基金项目

DOI

10.3969/j.issn.1000-7393.2002.06.009