American Institute of Mining, Metallurgical, and Petroleum Engineers, Inc.

This paper was prepared for the Rocky Mountain Regional Meeting of the Society of Petroleum Engineers of AIME, to be held in Denver, Colo., April 7–9, 1975. Permission to copy is restricted to an abstract of not more than 300 words. Illustrations may not be copied. The abstract should contain conspicuous acknowledgment of where and by whom the paper is presented. Publication elsewhere after publication in the JOURNAL paper is presented. Publication elsewhere after publication in the JOURNAL OF PETROLEUM TECHNOLOGY or the SOCIETY OF PETROLEUM ENGINEERS JOURNAL is usually granted upon request to the Editor of the appropriate journal provided agreement to give proper credit is made. provided agreement to give proper credit is made. Discussion of this paper is invited. Three copies of any discussion should be sent to the Society of Petroleum Engineers office. Such discussion may be presented at the above meeting and, with the paper, may be considered for publication in one of the two SPE magazines.

Abstract

The Bell Creek Field consists of six Muddy Sand reservoirs unitized as six units. A line drive water flood from the west edge of each reservoir has been in operation since 1970. oil production in November 1974 was 26,000 BPD. Cumulative production to December 1974 was 66.9 million barrels of oil. Tertiary recovery by a micellar process is under active consideration.

Introduction

The Bell Creek Field is located sixty miles north of Gillette, Wyoming, in Townships 8 and 9 South, Range 53, 54 and 55 East, Powder River and Carter Counties, Montana, as shown on Figure 1. The field is fifteen miles long and three and one-half miles wide, and consists of six secondary recovery units encompassing 17,000 productive acres, containing 305 active producing and injection wells. The current 26,000 BOPD rate accounts for nearly one-third of the oil production in the State of Montana.

HISTORY

The field was discovered June 4, 1967, by Exeter Drilling on a farm-out from Samuel Gary. The discovery well, 33-1 Federal-McCarrel, located in the NE1/4NE1/4 of Section 33, Township 8 south, Range 54 East, was completed for an initial pumping potential of 230 BOPD from perforations at 4524 to 4537 feet.

The Montana oil and Gas Commission designated forty-acre spacing for Bell Creek which resulted in drilling and completion of 405 oil wells and 10 gas wells. The average depth of a Bell Creek well is 4500 feet.

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