酸化解堵工艺的应用

子长采油厂长2 油层酸化解堵工艺的应用

摘要

子长采油厂长2 油层酸化解堵工艺应用摘要：酸化是油气井增产、注入井增注的又一项有效的措施。其原理是通过酸液对岩石胶结物或地层孔隙、裂缝内堵塞物等的溶解和溶蚀作用，恢复或提高地层孔隙和裂缝的渗透性，从而达到油气井增产、注入井增注的目的。酸化按照工艺的不同可分为酸洗、基质酸化和压裂酸化（也称酸压）三大类。

子长采油厂长2 油层从1997年开始大规模开发, 2001年进行转注试验，随着开采年限的增加,，地层压力逐步下降，近井地带结垢严重。本文主要介绍碳酸盐岩和砂岩油气层的酸化原理、工艺方法、酸化用酸和添加剂的特性。并且将该酸化工艺在子长油田地区进行了应用，施工后增产、增注十分明显，取得了良好的效果。

关键词：酸化、酸洗、基质酸化、压裂酸化

Ganguyi Oil Field resolve the acid blocking the

application process

Abstract:Acidification is the production of oil and gas wells, injection wells by a further injection of effective measures. The principle adopted is the acid rock formation cement or pores, cracks, etc. within the plug of the dissolution and dissolution,sestore or enhance the cracks and pore formation permeability, so as to achieve production of oil and gas wells, injection wells by the purpose of Note. According to the acidification process can be divided into different pickling, the matrix acidizing and fracturing acid (also known as acid pressure) three categories.

In this paper, carbonate rocks and sandstone layer of oil and gas acidification principle of methods, with acidification of acid and additives, and the acidification of Ganguyi oilfield in the areas of application, after the construction of production is very clear, have achieved good results.

Keywords: acidizing ，pickling，matrix acidizing，fracturing and acidizing

目录

1 前言..................................................................................... - 1 -

1.1目的及意义 ................................................................................................ - 1 -

1.2应用现状及前景........................................................................................ - 1 -

1.3研究方法 .................................................................................................... - 2 -2酸化解堵工艺的基本原理............................................................... - 3 -

2.1油层酸化概述............................................................................................ - 3 -

2.2酸—岩反应机理........................................................................................ - 3 -

2.2.1地层岩性和矿物成分 ..................................................................... - 3 -

2.2.2酸—岩反应的基本理论 ................................................................. - 5 -

2.2.3盐酸酸岩反应机理 ......................................................................... - 6 -

2.2.4土酸酸岩反应机理 ......................................................................... - 6 -

2.3酸化解堵工艺的增产原理........................................................................ - 7 -

2.3.1碳酸盐岩基质酸化增产原理 ......................................................... - 7 -

2.3.2碳酸盐岩储层酸压增产原理 ......................................................... - 8 -

2.3.3砂岩储层基质酸化增产原理 ......................................................... - 8 -

3 酸液与添加剂的选择以及用量计算 ......................................... - 10 -

3.1酸液与添加剂.......................................................................................... - 10 -

3.1.1常用酸 ........................................................................................... - 10 -

3.1.2添加剂 ........................................................................................... - 10 -

3.2酸液类型 .................................................................................................. - 12 -

3.3酸液及添加剂用量计算.......................................................................... - 12 -

3.3.1浓酸用量计算 ............................................................................... - 12 -

3.3.2添加剂用量计算 ........................................................................... - 13 -

4 子长采油厂长2油层酸化解堵工艺的应用 ............................... - 14 -

4.1子长采油厂长2油层地质概况.............................................................. - 14 -