Exhibit 23(b) [NETHERLAND, SEWELL & ASSOCIATES, INC. LETTERHEAD] CONSENT OF NETHERLAND, SEWELL & ASSOCIATES, INC. As oil and gas consultants, we hereby consent to the use of our name and our report dated November 5, 2004 in this Form 10-K, incorporated by reference into Peoples Energy Corporation's previously filed Registration Statement File Nos. 333-84594 and 333-70702 on Form S-3, and 2-82760, 33-6369, 033-63193, 333-62070, 333-113204 and 333-116192 on Form S-8. NETHERLAND, SEWELL & ASSOCIATES, INC. By: /s/ Danny D. Simmons --------------------------------- Danny D. Simmons Executive Vice President Houston, Texas December 14, 2004