Abstract: A method of treating a formation at a lateral section of a well is disclosed. The lateral section has openings in a casing, which can be un-cemented. Treatment fluid with or without a proppant, such as sand slugs, is pumped into the well to induce fractures in the formation. The treatment fluid is pumped into the well to treat portions of the formation at the heel and toe of the lateral section without mechanically dividing the lateral section of the well. A concentration of degradable diverting agent is mixed with the treatment fluid, and the treatment fluid with agent is pumped into the well. The agent is pumped into the portions of the formation having the lowest fracture gradient, such as near the heel and toe of the lateral section. The pumped fluid is at least diverted from the heel and toe of the lateral section by the agent so that portions of the formation adjacent the middle portion of the lateral section can be treated the pumped fluid.