Means of Controlling Gas-oil Ratio
- Hallan N. Marsh (General Petroleum Corp. of California) | Bruce H. Robinson (General Petroleum Corp. of California)
- Document ID
- Society of Petroleum Engineers
- Transactions of the AIME
- Publication Date
- December 1929
- Document Type
- Journal Paper
- 183 - 195
- 1929. Original copyright American Institute of Mining, Metallurgical, and Petroleum Engineers, Inc. Copyright has expired.
- 4.1.5 Processing Equipment, 1.10 Drilling Equipment, 3.1.6 Gas Lift, 5.4.2 Gas Injection Methods, 2.2.2 Perforating, 5.2.1 Phase Behavior and PVT Measurements, 4.1.2 Separation and Treating
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It is now generally recognized that to secure the greatest ultimate recoveryof petroleum from a field it is necessary to maintain at all times the lowestpossible ratio of gas to oil production. The numerous ways of securing lowratios are not so generally understood or practiced. To many operators,reduction of gas-oil ratio simply means "beaning back" wells, withresultant reduced production rate. This postponement of production is oftenconsidered and spoken of as "lost" production, with the result thatcontrol of gas-oil ratio is in disfavor with some operators.
Various methods are herein discussed by which gas-oil ratio may be reduced,some of which involve no curtailment of current production, while others areaccompanied by an actual increase of daily production. It is further shown thatin cases where rate of production is reduced to conserve gas, the indicatedultimate recovery is generally increased. Principles involved are discussed,and conclusions are illustrated by data from the operation of wells.
The rate and ratio in which oil and gas enter a well are solely dependent,so far as the operation of that well is concerned, upon the pressuresmaintained in the well opposite the producing strata at various times and atvarious depths. The method of getting the oil out of the hole, whether bynatural flow, gas-lift, or pumping, has no effect upon either rate ofproduction or ultimate recovery except through its effect upon pressures.
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