石油与天然气化工Issue(5)：515-520,6.DOI:10.3969/j.issn.1007-3426.2014.05.011
超低渗储层混合水体积压裂重复改造技术研究与现场试验
Re-fracturing technology research and field application of mixing water volume fracturing in ultra-low permeability reservoir
摘要
Abstract
Single well has low yield in Huaqing low permeability oilfield .The wells with daily output less than 1 tons account for a larger proportion of total wells ,reaching 56 .2% in Huaqing Oilfield .Re-fracturing is an important measure to improve the production of fractured wells in Changqing ultra-low permeability reservoirs .Currently ,the re-fracturing well stimulation is not ideal by using the conventional technologies .The performances such as small yield increase ,wa-ter cut rising ,production decline suddenly ,short increasing period are appeared after re-fractu-ring .In this paper ,the hybrid slick water SRV and multi-stage temporary blocking fracturing are combined to work for old production wells in ultra-low permeability reservoirs .Considering the well pattern and injection well conditions ,the theories of volumetric fracturing and multi-stage temporary blocking are combined .After the parameters optimization in the laboratory and appli-cation of nine wells in the field ,the average single well daily output increased 2 .81 t ,the effec-tive production period for average single well is up to 252 days ,and the effect of increasing yield is significant .The successful application of this technique also provides a strong basis for the re-fracturing in ultra-low permeability reservoir .关键词
重复压裂/体积压裂/混合水压裂/增产机理/多级暂堵Key words
re-fracturing/volume fracturing/mixing water fracturing/increase production mechanism分类
能源科技引用本文复制引用
李建山,陆红军,杜现飞,齐银,顾燕凌,史成恩,令永刚..超低渗储层混合水体积压裂重复改造技术研究与现场试验[J].石油与天然气化工,2014,(5):515-520,6.基金项目
国家科技重大专项“超低渗透油藏有效开采技术”（2011ZX05013-004）。 （）
