大牛地气田压裂液体系性能评价及优化  

Evaluation and optimization abs on fracturing fluids in Daniudi Gas Field

作　　者：刘善勇[1,2] 陈迪[3] 

机构地区：[1]长江大学石油工程学院,湖北武汉430100 [2]油气钻采工程湖北省重点实验室,湖北武汉430100 [3]中国地质大学(北京)能源学院,北京100083

出　　处：《化学工程师》2017年第2期53-56,52,共5页Chemical Engineer

摘　　要：大牛地气田主要采用长水平段水平井分段压裂工艺进行增产改造。压裂液泵入地层后由于交联时间过早,在管柱内产生较大摩阻,造缝不充分,同时破胶不彻底易产生残渣,对储层造成伤害。为了提高该区块压裂改造的效果,优选适合大牛地气田的压裂液体系,本文通过室内实验,对目前使用的压裂液体系进行了完整的性能评价。基于流变和破胶实验,对不同类型的压裂液体系进行了优化,结果表明:优选后的压裂液体系可适应温度范围60~95℃储层,压裂液体系具有较好的耐剪切性和携砂性。另外针对长水平段分段压裂施工,建议采用"胶囊破胶剂+过硫酸铵+低温破胶活化剂"的组合方式。优化后的压裂液体系能够满足现场要求。Long horizontal well completion method and mulit-staged fracturing technology was applied in Daniu di Gas Field. Because of earlier crosslink of fracturing fluids in tube, it would generated higher friction pressure and shorter fracture length. Meanwhile, the formation would be polluted due to the incomplete gel breaking and residue. In order to improve the effects of the reservoir stimulation, this paper give a full evaluation on the fracturing fluids with the lab test. Based on the rheology test and gell breaking test, the optimization of the fracturing fluids has been made. The results found for the formation with temperature between 60 to 95℃, the fluid system has a good ability of anti-shear and prop-carrying. In addition, for long horizontal well, ＂capsule breaker＋ ammonium persulfate＋ low temperature activator＂ was recommended. And the optimized system could meet the requirements on the field.

关 键 词：压裂液 长水平井 室内评价 压裂液优化 破胶 

分 类 号：TE39[石油与天然气工程—油气田开发工程]