油井堵水2酸化综合工艺技术

Comprehensive Technique of Water ShutOff and Acidizing for Oil Wells

黄志华 魏明军 朱公顺

中原石油勘探局采油工程技术研究院

Reservoir Modification Research Center of Oil Production Engineering Technology Research Institute ,Zhongyuan Petroleum Exploration Bureau , Henan 457001 , P. R. China

中原油田为严重非均质油藏,多层注采开发导致层间渗透率差异不断扩大。物性好的油层采油速度快,由于单层突进而过早水淹;而物性差的油层不能得到有效动用,且可能存在污染伤害。油井堵水2酸化综合工艺是一项封堵出水层与酸化解堵潜力层相结合的新工艺。本文介绍了该技术的工艺原理及耐酸高强度堵剂的性能评价结果。现场应用表明,堵水2酸化综合工艺具有效果互补的技术优势,增油降水效果好,作用有效期长。

Zhongyuan Oilfield is a heterogeneous reservoirs seriously. Multi-zones injection production development leads to permeability difference among formations enlarging continuously. Oil courses having good physical properties are premature water-flooded , because its recovery velocity is quick and single layer is dartled. Oil courses having bad physical properties can’t be dawn up on effectively ,and contaminating and damaging might be in existence. Oil well plugging acidizing colligation technology is a novel technology ,which combines water exit interval plugging and acidizing potential oil reservoir together. This paper present s the technology principle and test results of acidproof plugging agent. Applied on location , the plugging-acidizing colligation technology showed that the total effect was improved as the two technologies enhanced each other. The period of validity is longer.