胡芦巴胶硼砂压裂液在长庆油田深井中的应用

Application of fenugreek gum fracturing fluid in deep wells of Changqing Oilfield

胡芦巴胶是我国自主种植、加工的一种天然植物胶,含有丰富的半乳甘露聚糖,通过深加工改性,可用作水基压裂液稠化剂。胡芦巴胶硼砂交联压裂液具有良好性能,通过实验对压裂液流变性、携砂能力、破胶性能、滤失性、储集层伤害程度等项目进行评价,其性能基本达到胍胶硼砂压裂液水平,某些性能甚至优于胍胶硼砂压裂液。长庆油田深井试验表明,胡芦巴胶硼砂压裂液可满足压裂携砂、增产、降低成本的要求。胡芦巴胶除用作增稠剂以外,其副产品还可以用于医药、食品等行业。如规模化生产,成本将进一步降低,与胍胶相比胡芦巴胶的价格更具有优势。随着我国低渗透油田开发规模不断增加,水力压裂作业数量逐年上升,胡芦巴胶硼砂压裂液具有广阔的应用前景。

Fenugreek gum, which has rich Polygalacto-mannitose, is a sort of natural vegetable gum. It is planted and processed in China and can be used as the vlscosifier of the water-base fracture fluid after processing and modifying. The borax cross-linked fracture fluid of fenugreek gum possesses nice performance. The experimental evaluation of the fracture fluid＇s rheology, carrying capacity, gel-breaking, filtration, etc. shows that its performance is close to guar gum fracturing fluid and even better than the guar gum fracturing fluid in some aspects. Testing in deep wells of the Changqing oil field shows that the fenugreek gum fracturing fluid meets the demands of fracturing and transporting sand, increasing production, and reducing the cost. With large-scale production, its price will be more competitive than guar gum. With China＇s low permeability reservoirs＇ development and the increasing of hydraulic fracturing, it holds wide prospects for application.