致密储层可压裂性影响因素分析

Analysis of Fracturing Ability Factors of Tight Reservoir

可压裂性是非常规油气储层在压裂作业过程中能否有效压裂并产生网状裂缝,达到产出工业油气流的性质。研究表明,储层的脆性越大、断裂韧性越小、天然裂缝越发育,有机质成熟度越高,有机碳含量越低,储层的可压裂性就越好。另外,储层的地应力、沉积环境和内部构造等因素也影响着地层的可压裂性。地层可压裂性研究对于油气“甜点”选择、压裂施工设计和油田经济效益预测等具有重要意义。

Fracturing ability is the characteristic used to measure whether the tight reservoir could be effectively fractured and form network in the process of hydraulic fracturing in order to improve the production of oil and gas.Research shows that the more brittle the reservoir is,the weaker the fracture toughness is,the more developed the natural fracture is,the higher the maturity of organic matter is,the lower the organic carbon content is,and the better the fracturing ability is.In addition,factors such as crustal stress,sedimentary environment and internal structure of the reservoir also affect the fracturing ability.The analysis of reservoir fracturing ability plays a key role in the selection of oil and gas"sweet heart",multi-stage fracturing design and prediction of oilfield economic benefits.