石油钻采工艺Issue(5)：78-81,88,5.DOI:10.13639/j.odpt.2015.05.019
鄂尔多斯盆地致密油层混合压裂簇间干扰研究
Inter-cluster interference in hybrid fracturing of tight oil reservoirs in Ordos Basin
摘要
Abstract
Relevant research has been conducted to the effect of fracturing displacement in tight oil reservoirs in Ordos Basin and the inter-cluster stress interference on creation of complex fracture network. The discrete fracture network model and ifnite element software were used, and two wells were selected for comparison on fracturing design parameters, production and the results of micro-seismic monitoring. The research ifndings show that, large displacement and large liquid volume are the basis to guarantee creation of complex fracture network. There exists a critical pumping rate to create complex fracture network under certain formation conditions and fracturing parameters. In case of multi-cluster fracturing, the non-synchronous cracking of major fractures will lead to non-synchronous extension of major fractures. The ifrstly extended major fractures may suppress the extension or even initiation of the surrounding major fractures, but around the lately extended major fractures may occur shear-induced secondary fractures, which is favorable for creation of complex fracture network. Therefore, in hybrid fracturing design, a fracturing displacement which is larger than the critical pumping rate helps increase the area of stimulated reservoir and increase the oil well production, while the number of major fractures initiated and extended during multi-cluster fracturing may be less than the designed cluster quantity.关键词
致密油层/混合压裂/临界排量/复杂缝网/应力干扰Key words
tight oil formation/mixed fracturing/critical lfow rate/complex fracture network/stress interference分类
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彭娇,周德胜,张博..鄂尔多斯盆地致密油层混合压裂簇间干扰研究[J].石油钻采工艺,2015,(5):78-81,88,5.基金项目
陕西省科技统筹创新工程计划项目“陆相页岩气储层压裂改造工艺技术攻关”（编号2012KTZB03-03-03-02）。 （）
