Optimization of Construction Discharge Rate and Proppant Slugs for Preventing Complex Fractures

For volcanic rock and fracture type reservoir, etc, steering fractures, branching fractures and their combined herringbone fractures are usually caused by hydraulic fracturing. The generation of these complex fractures is one of the crucial factors that affect the success or failure of fracturing and the effect after fracturing. How to optimize fracturing construction parameters for the purpose of prevention and curing or cutting complex fractures plays an important role in improving the fracturing success rate and the effect after fracturing. This paper has discussed the impact of construction discharge rate on complex fractures and established three optimization criteria about construction discharge rate, which are suitable for different type of complex fractures, Meanwhile, this paper has also studied the prop pant slugs technology of different stages in fracturing and formed the prop pant slug optimization technology and application guide. More than 30 wells on-site application of practice show that these technologies are able to prevent and cure or cut complex fractures, and provide technical support for hydraulic fracturing.