论文详情

钻井液密度低就能保护油气层吗?

石油钻采工艺

1996年 18卷第3期

阅读：88

查看详情

Title

CAN THE LIGHTWEIGHT DRILLING FLUID PREVENT FORMATION DAMAGE?

作者

杨振杰

Authors

Yang Zhenjie

单位

中原石油勘探局钻井四公司

摘要

钻井过程中,正向压差对油气层既有污染的一面,又有保护的一面,关键在于能否迅速形成牢固而致密的滤饼。平衡钻井或近平衡钻井由于压差过小,对高质量滤饼的形成和巩固不利,所以更易造成油气层污染。若采用屏蔽暂堵技术,适当高的正向压差有利于迅速形成强度高、致密性好的滤饼,同时兼顾了井控安全和井壁稳定,所以更有利于保护油气层。

Abstract

In drilling,the positive pressure difference can damage and protect the oil and gas zone.The key problem is rapidly to form the tight cake.Because of the low differential pressure on balanced drilling or near balanced drilling,it is harmful to form and strengthen high quality cake.So it is easy to damage oil and gas zone.If the shielding temporary close technology is used,a suitable high positive differential pressure is benefit to form the strong and good quality filter cake.At the same time,it makes the well control safe and well wall stable.So it is much suitable for formation damage prevention.

关键词：

钻井液密度; 压差; 滤饼; 滤液; 固相; 屏蔽; 防止地层损害;

Keywords:

Drilling fluid density; differential pressure; filter cake; filtrate; solid; shielding; formation damage prevention;

基金项目

DOI

10.3969/j.issn.1000-7393.1996.03.009