Horizontal well fracturing parameter design for horizontal fractures in Chang-6 shallow oil reservoirs in Yanchang Oilfield

Horizontal well fracturing technology is an effective way to develop the hard-to-produce low permeability reservoirs, but horizontal fractures (low angle) are usually formed when fracturing Chang-6 shallow oil reservoirs with low permeability, which affects the actual construction effectiveness. In order to better guide the field fracturing design and construction for horizontal wells of Chang-6 shallow oil reservoir, the porosity, permeability, oil saturation, shale content and seepage coefficient were used as main parameters, and the reservoirs of horizontal segment in Qiping-1 well was divided into 5 flow units, and evaluation was conducted to typesⅠ,Ⅱand Ⅲ flow units. According to the division of flowing units, the parameter design of number of horizontal fractures, fracture location, half length of fractures was completed for Qiping-1 well. The analysis of field fracturing effectiveness shows that this design meets the reservoir features and development requirement of Chang-6 shallow oil reservoirs in Yanchang Oilfield. The productivity of single well was increased greatly. Horizontal well development of Chang-6 shallow oil reservoir enjoys a favorable prospect.