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The possibility of deeper production in the Buena Vista Hills was firstconsidered in 1933. At that time, however, the heavy state curtailment programserved to deter any operator from drilling test wells, which, if successful, might upset the proration schedules. Because most of the acreage was held byseveral major operators and the remainder by substantial independents, theadoption of a plan of cooperative development was considered desirable. Such aplan was formulated for the development of any deeper oil and gas horizons thatmay be found to exist. This plan, which was signed by the Secretaries of theNavy and of the Interior on behalf of the United States on July 9, 1936, is noweffective for the development of lands within the area shown on Fig. 1. Unlikemost unit plans, the present cooperative development plan permits each operatorto drill and produce his own wells. For the purpose of this plan the Buena Vista Hills field is divided into twopools. The present production is classed as the" old pool," while anyfuture production below a certain marker which roughly coincides with thebottom of the Santa Margarita formation is included in the" pool" towhich the provisions particularly apply. Naval Petroleum Reserve No.2 lies within the area and constitutes the majorportion of the Federal leases subject to the plan. There are 39,040 acres and27 operators within the area. Twenty-six operators controlling 99.5 per cent ofthe acreage have signed the agreement. Geology of the Buena Vista Hills The Buena Vista Hills consist of a low range in the southern portion of the SanJoaquin Valley, and are roughly parallel to the adjacent Temblor range to thesouth. The Elk Hills oil field parallels the Buena Vista Hills a? few miles tothe north.
- North America > United States > Texas (1.00)
- North America > United States > California > Kern County (1.00)
- North America > Canada > Alberta (1.00)
- Energy > Oil & Gas > Upstream (1.00)
- Government > Regional Government > North America Government > United States Government (0.70)
- North America > United States > California > San Joaquin Basin > Santa Margarita Formation (0.99)
- North America > United States > California > San Joaquin Basin > Elk Hills Field (0.99)
- North America > United States > California > San Joaquin Basin > Buena Vista Hills Field (0.99)
- North America > Canada > British Columbia > Midway Basin (0.99)
It is apparent that repressuring of the oil measures is becomingincreasingly important to the oil industry, and is a matter that warrants thebest efforts of the petroleum engineer charged with applying this method ofoperation to a producing property. Considerable attention has been directed torepressuring in various California oil fields, such as Dominguez and SealBeach, which have served to sell the more progressive operator on this idea andalso to keep him sold. The projects that have received most attention are incomparatively young fields where the fluid levels are high, the wells, perhaps, still flowing, where the wet gas production is of considerable volume, andwhere there is vital need of immediate conservation of gas, which otherwisewould be blown to the air. The new State of California Gas Law, which prohibits the waste of gas, hasserved to interest the oil industry in means of conserving the gas that is nowbeing blown to the air because of lack of markets. This vitally affects theoperator in the older, well-depleted oil fields of the state, because in manycases he has a limited market for gas, on account of the flush production fromthe more active oil fields. While the waste of gas is relatively small in theseolder fields, such as the Midway-Sunset area, it now attains considerableimportance, since under the new State Gas Law it must be put to some beneficialuse. Repressuring in the older fields of California has not received the attentionof the petroleum engineers that is warranted by the present situation. Thispaper was prepared with the view of presenting the salient features connectedwith repressuring in the well-depleted oil measures of the older fields, and toshow what results have already been obtained in these fields by injecting theunmarketable gas into the sands, particularly in the Midway-Sunset field in theSan Joaquin Valley of California. Other projects in the older fields of thestate offer some supporting data in this connection, such as the Shields Canyonand the Brea Canyon fields.
- Energy > Oil & Gas > Upstream (1.00)
- Government > Regional Government > North America Government > United States Government (0.34)
- North America > United States > California > San Joaquin Basin > Elk Hills Field (0.99)
- North America > United States > California > Los Angeles Basin > Seal Beach Field (0.99)
- South America > Brazil > Parnaiba Basin > Block PN-T-68 > California Field (0.97)
- (3 more...)
The purpose of this paper is to present certain variations in production of oil wells when the offset wells are shut in. The scope of the study has been confined to California fields, and more especially to those of the San Joaquin Valley. The accepted definition of a shut-in well is a well where production has been suspended by closing in the casinghead and tubing or by cessation of pumping. The immediate effect of such a procedure, of course, is to reduce the oil production from the lease, which is the result desired. However, it appears that certain types of wells vary widely in production of oil, gas and gasoline after adjacent wells have been shut in, which variation has a very material effect on the ultimate recovery of oil from the property. The increase or decrease in the oil production itself may not be of sufficient volume to occasion comment, but wide fluctuations in the gas and gasoline recovery under the changed conditions are of the utmost importance in the future recovery of oil. The scope of this paper includes: (1) the effect on producing oil wells of shutting in offset wells, the wells being studied in three groups arranged according to their relative stages of depletion; (2) probable source of excess gas and the effect on the ultimate recovery of oil; (3) suggested procedure when wells are shut in; (4) methods that could be employed to prevent undue migration of gas from the shut-in area; and (5) the need for future studies of the situation. For the purposes of this paper producing wells in California have been arranged in three groups according to the age of the well, or to the relative stage of depletion of the producing zones. The first group consists of those wells with a high fluid level, or in other words those wells whose fluid levels are a considerable distance above the top of the perforations. The second group consists of those wells with the fluid level just above, or even a short distance below, the top of the perforations.
- North America > United States > Pennsylvania > Appalachian Basin > Bradford Field (0.99)
- North America > United States > California > San Joaquin Basin > Midway-Sunset Field > Webster Formation (0.99)
- North America > United States > California > San Joaquin Basin > Midway-Sunset Field > Monterey Formation (0.99)
- (3 more...)