Qpynght lWS, S&xely of Patrcdaum Engmews, ImThis psmf WS prepared far pfewntatmn at the Gas Technology Conference held m Calgmy Allwt8, Canada 28 April -1 May 199S Thm paper was aolected for pmsen!mimn by an SPE Program Commmee following rewew of mformatmn Wntmned m en atM!ract submrlted by the aulhon Contents of the paper as presented have nd been revmwad by the SacIety of Pebmlsum Engmoem and we subpcf to ccmc$km bf!ha UAbs(s) The msterml, as presented, dc-m nof nscesssnly reflect any pomon of the Society of Petroleum ErKIrwers Its .#kc.m, or members Papem preaentnd at SPẼ qm W-W publ~rmw by Editeml Cemmittoas of bw ac.aoty of petmieum Engineers. Pernmwon to copy m rastncted to an atict of not -dwn KIO wwds Ibbabom may not be cepted The qt+trtishwld Wntaln cerdpicuous acknowledgement of wharo qnd by Mom &m papw WS pasenmd. Writs Libmtian, SPE, P O SIX S3393S, Richwd80n, TX 750s3ss3s, U S.A, fax 01-214-9s2-94SS Abstract over thepast couple of years oil and gas operators in Alberta have been faced with an increasing challenge to reduce atmospheric emissions. One of these emission sources comes from oil and gas pools that contain uneconomic quantities of hydrogen sulphide and carbon dioxi& (acid gas). Disposal of this acid gas to underground formations is sometimes a cost effkctive alternative to sulphur recovery and it also can reduce the public concern resulting from sour gas production and flaring.In Alberta, the Oil and Gss Cobservation Act requires that operators apply for and obtain approval from the Alberta Energy and Utilities Board (EUB) to dispose of the acid gas. Before approving any scheme, the EUB reviews the application in order to satisfi several primary issues: maximizing conservation of hydrocarbon resources, minimizing environmental impact, promoting public safety, and ensuring that the equity interests of mineral rights owners are protected. To adequately address these matters, the EUB requires that applicants submit information regarding surface facilities, disposal well eontlgurations, and maemmirfwtors. This paper discusses the information required and describes the process that should be followed by operators who wish to obtain EUB approval fm underground disposal of acid gas. In additmn, this paper discusses the performance of some of the acid gas disposal schemes currently operating in Alberta,