RU2064573C1 - Method for exploitation of hydrocarbon field by flooding - Google Patents

Abstract

FIELD: hydrocarbon production. SUBSTANCE: method provides driving gas or petroleum or gas condensate with water. Water running into hydrocarbon bearing seam is carried out by elastic oscillations applied to water bearing horizon from area or oil-water or gas-water contact. EFFECT: high productivity. 2 cl, 1 dwg

Description

 The invention relates to the oil and gas industry, more specifically to methods for developing hydrocarbon deposits by water flooding, and can be used in the extraction of oil, gas and gas condensate.

 A known method of developing an oil field (ed. St. USSR N 1596081, class E 21 B 43/00, 1990), including the vibration effect from ground-based seismic sources on the flooded section of a hydrocarbon-containing formation, by increasing the mobility of the trapped oil in the mixture of reservoir fluids increases oil recovery.

 The disadvantage of this method is its inefficiency for deposits with a low percentage of water cut, the lack of operations for the displacement of hydrocarbons from the reservoir.

 There is a method of developing a gas, gas condensate or oil field by water flooding (A.Kh. Mirzadzhanzade, I.M. Ametov, K.S. Basniev, etc. Natural gas production technology, M. Nedra, 1987, p. 414).

 The method includes injecting water into the formation, which displaces gas, gas condensate, or oil to production wells.

 Its disadvantage is the need to pump significant volumes of water into the formation through injection wells, in addition, the method has inherent losses during flooding of trapped gas and oil, which remain in the formation and can be from 15 to 40% or more of the reserves.

 The problem to which the invention is directed, simplifying the method, reducing the cost of its implementation and increasing recoverable reserves.

 The specified technical result is associated with a reduction in the cost of pumping equipment, drilling of additional injection wells with the exception (or a significant reduction in volumes) of water injection while increasing the recoverable hydrocarbon reserves. It is achieved by the fact that the movement of water into a hydrocarbon-containing formation is organized by acting on the contour and / or bottom water, the effect is preferably on the gas-water (GWC) or oil-water contact (NEC), either from the GVC or from the NEC. In this case, the effect is carried out by elastic vibrations.

 The drawing shows a diagram of the implementation of the method.

 The method is illustrated by the following implementation example.

 Sources of impulse action 4 are installed over the oil reservoir 1, on the day surface 2 on waveguides 3. Waveguides 3 terminate in the aquifer 5, preferably near the oil-water contact (NEC) 6. Also, harmonic oscillation sources are lowered into the NEC zone 7 through wells 7. When exposed fluctuations from sources 4 and 8 in the oil reservoir 1 due to the sound-capillary and other effects generated by the oscillations, water begins to flow from the aquifer 5, which displaces the oil to production wells 9. From the aquifer 5 akzhe released gas, which promotes more intensive promotion of water into the reservoir 1 and increases oil mobility. This is additionally facilitated by the excitation of waves in the oil reservoir 1 in the region of the waveguides 3 and from the sources 8. In addition, the oscillations prevent the formation of pinched pillars of oil, and if they are formed, then in a much smaller amount, in some cases additional injection of water into the reservoir is also possible. 1 through wells 7 or other injection wells (not shown). However, the volumes and duration of such an injection are significantly less than in the known method.

 The main advantages of the method are: the absence of the need to pump significant volumes of water into the reservoir, lower capital investments, operating costs, increased recoverable hydrocarbon reserves, the method also contains other advantages obvious to specialists.

 The method may include a combination with the proposed waterflooding process of other traditional techniques used in field development.

Claims (2)

 1. A method of developing a hydrocarbon field by water flooding, including moving water into a hydrocarbon containing formation and displacing hydrocarbons from it, characterized in that water is moved into the formation by applying elastic vibrations to the contour and / or bottom water.  2. The method according to p. 1, characterized in that the effect is carried out at the level of gas or oil contact and / or from the zone of gas or oil contact.