Volumetric method: Volumetric methods of oil estimation draw upon measurements of the size of the reservoir and the properties of fluids and rocks to determine an approximate volume. After determining the amount of oil in place, an estimator then assumes a recovery factor based on figures from oil fields with similar properties. By multiplying the estimated OIP by the recovery factor, one arrives at the reserve number. In general, the volumetric method is most effective in the early stages of the extraction process, before a significant quantity of oil has left the reservoir. Production decline curve method: Unlike the volumetric method, which makes use of measurements of physical characteristics, the production decline curve draws upon figures obtained from the production cycle of the well in question. The production decline curve method plots production levels along a graph and establishes a curve to represent the data. Under the assumption that the decline in production is relatively smooth, one can use calculusbased formulas to estimate future production. Materials balance method: The materials balance method of OIP estimation involves an equation that takes into account the volumes of gas, water, and oil that has been produced by the reservoir. After considering the change in reservoir pressure over the time of production, one can then approximate the remaining volume of oil and gas. To produce accurate calculations using the material balance method, one must first perform rigorous analysis of the pressurevolumetemperature ratios and obtain a detailed history of the pressure in the reservoir.
Sentry Energy Production LLC on Ways to Estimate the Amount of Oil in a Subsurface Reservoir3/12/2014 A successful oil and natural gas development and exploration company located in Addison, Texas, Sentry Energy Production LLC has a focus in the extraction of oil from lands that have generated significant oil production in the past. Sentry Energy Production also relies on existing transportation infrastructure, which greatly facilitates the storage and transfer of crude oil to refineries. To estimate the quantity of oil in a particular reservoir, companies such as Sentry Energy Production draw upon a number of techniques to determine the approximate oil in place (OIP) and the recovery factor, which indicates the amount of oil that can be extracted. Here is a brief overview of some of the most common ways to estimate the amount of oil in a subsurface reservoir.
Volumetric method: Volumetric methods of oil estimation draw upon measurements of the size of the reservoir and the properties of fluids and rocks to determine an approximate volume. After determining the amount of oil in place, an estimator then assumes a recovery factor based on figures from oil fields with similar properties. By multiplying the estimated OIP by the recovery factor, one arrives at the reserve number. In general, the volumetric method is most effective in the early stages of the extraction process, before a significant quantity of oil has left the reservoir. Production decline curve method: Unlike the volumetric method, which makes use of measurements of physical characteristics, the production decline curve draws upon figures obtained from the production cycle of the well in question. The production decline curve method plots production levels along a graph and establishes a curve to represent the data. Under the assumption that the decline in production is relatively smooth, one can use calculusbased formulas to estimate future production. Materials balance method: The materials balance method of OIP estimation involves an equation that takes into account the volumes of gas, water, and oil that has been produced by the reservoir. After considering the change in reservoir pressure over the time of production, one can then approximate the remaining volume of oil and gas. To produce accurate calculations using the material balance method, one must first perform rigorous analysis of the pressurevolumetemperature ratios and obtain a detailed history of the pressure in the reservoir.
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Sentry Energy ProductionAs the U.S. government and its residents attempt to become less dependent on foreign oil and gas, oil and natural gas exploration and development firm Sentry Energy Production LLC seeks out reserves in the most efficient manner. Archives
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