新型无机凝胶涂层深部液流转向剂  

Inorganic gel coating in-depth fluid diverting agent

作　　者：唐孝芬 杨立民[1,2] 刘玉章 李芝燕[3] 常泽亮 李宜坤[1,2] 魏发林[1,2] 

机构地区：[1]中国石油采油采气重点实验室 [2]中国石油勘探开发研究院 [3]中国石油大港油田公司采油工艺研究院 [4]中国石油塔里木油田公司

出　　处：《石油勘探与开发》2012年第1期76-81,共6页Petroleum Exploration and Development

基　　金：国家重大科技专项"高效深部液流转向和精细分层注采技术"(2011ZX05010-003)

摘　　要：利用地层水中成垢离子,研制了环保型无机凝胶涂层深部调驱液流转向剂(WJSTP)。WJSTP溶液注入地层后与地层水交联反应,形成密度与水相近的无机硅酸盐凝胶,凝胶以整体或微粒形式分散悬浮于水中,通过吸附方式在岩石骨架表面逐渐结垢形成无机凝胶涂层,使深部地层水流优势通道逐渐变窄形成流动阻力,导致后续流体转向而达到改善水驱效果的目的。该剂具有快速溶解、耐温、抗盐、环保、长效等特点,先后在塔里木轮南油田、柴达木跃进油区、大港油田等不同温度不同矿化度油藏开展了单井组或区块整体深部调驱现场试验,试验井组转向或增油有效率达100%,井组注水压力平均升高2～3 MPa,对应油井增油、降水有效率达80%以上。The inorganic gel coating diverting agent,which is non-toxic and environmentally friendly,is developed for in-depth water diversion to improve water flooding effect.After being injected into the formation,the agent reacts with the formation water and forms inorganic silicate gel with a density approximating to formation water.The gel suspends in water as a bulk or particulates,scales and forms inorganic gel coating on rock surface by way of adsorption.The dominant channels of deep formation water are narrowed,forming flowing resistance and diverting the subsequent fluid so as to improve water flooding effect.This agent features fast solution,temperature resistance,salt resistance,environmentally friendly,and long-acting.It has been used in different reservoirs with different temperatures and salinity conditions,such as the Lunnan Oilfield of the Tarim Basin,the Yuejin oil region of the Qaidam Basin,and the Dagang Oilfield for in-depth profile control tests.The field tests involve single well group and whole block,with success ratio up to 100%,average injection pressure of well group increasing by 2-3 MPa,and the effective rate of oil production increase and water-cut decrease of producers reaching more than 80%.

关 键 词：深部调剖 转向剂 无机凝胶 涂层 现场试验 效果分析 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]