The way to develop heterogeneous hydrocarbon deposits

 

The invention relates to the oil and gas industry and can be applied in the development of terrigenous deposits of hydrocarbons, complicated by the presence of zones of different permeability. Improves the efficiency of the heterogeneous development of oil deposits at the expense of a more rational approach to selecting systems development using data from a detailed study of sedimentation. The inventive method comprises the steps of drilling on the area of deposits and production of hydrocarbons through the production wells. According to the invention for deposits, alluvial deposits, at the stage of drilling on the rare grid according to geophysical and core research building map lithological facies sediments in the reservoir. Within floodplain sediments with low permeability and high ruggedness deposits net wells condense. Within the fluvial deposits net condense on the stage lowerbody hydrocarbon reserves. 1 Il.

The invention relates to the oil and gas industry and can be applied in the development of terrigenous deposits of hydrocarbons, is complicated by the presence of zones with razvedenia first wells on the thinness of the net produce of their research and determine the direction between the two wells with the highest interaction with each other, then the vertical and horizontal trunks new production wells are located in the gap between the two wells with the highest interaction, and horizontal trunks are placed perpendicular to the direction between the two wells (U.S. Pat. 2010955 of the Russian Federation, IPC 5 E 21 In 43/30, E 21 In 43/20, publ. 1994).

The disadvantage of this method is that the hydrodynamic coupling between the two wells drilled by the sparse grid may not be oriented in one direction (for example, wells can be drilled on the bend of paleolake, the second well may be associated with the first fault), so well drilled between them, can get into the zone with low permeability. Rasborinae reservoir according to this principle, when the change in the geological structure it can be difficult to transform the selected system in the conventional development system, including uniform location of wells in areas with similar reservoir properties (CFP), which will lead to uneven development of reserves and subsequent reduction of the oil recovery factor (CIN).

The technical result of the invention is the increased efficiency of the development of heterogeneous oil reservoirs for MF the building.

The technical result is achieved in that in the method of developing heterogeneous deposits of hydrocarbons, providing the phases of drilling on the area of deposits and production of hydrocarbons through the production wells, according to the invention for deposits, alluvial deposits, at the stage of drilling on the rare grid according to geophysical and core research building map lithological facies sediments of the reservoir, at the same time within floodplain sediments with low permeability and high ruggedness deposits net wells compacted, and within the fluvial deposits net condense on the stage lowerbody hydrocarbon reserves.

The drawing shows the layout of the wells in the reservoir, where the numeral 1 indicates a well drilled on a sparse grid, 2 - projected wells, 3 wells drilled on a sparse grid, but caught in channel deposits, broken line (- -) denotes the boundary of the fluvial deposits.

The method is implemented as follows.

The reservoir in which the reservoir rock are alluvial sediments, razvarivat rare wells, which, as necessary, adapted to the given geological conditions using any sidetracking).

At the stage of drilling deposits map construction facies deposits. This is done using geophysical data and drill core studies. Currently available methods of processing this information enable you to highlight in the reservoir lithofacies and, thus, to build a map facies sediments of the productive formation (Dolecki Century A. Geological interpretation of geophysical research wells. - Moscow, 1966; Grachevsky M. M., Berlin Y. M. and other Correlation raznorazmernyh strata in search of oil and gas. - Moscow, 1969). On the map, the facies define drilling wells. Within floodplain sediments, which are characterized by low permeability and high ruggedness, to increase the enrolment rate net wells sealed. Net wells caught in channel deposits and with rates of 8-12 times exceeding the production rate of wells located in the floodplain, due to the effective development of the reserves condense on the stage lowerbody stocks (see drawing).

Then at the appointed places known methods of drilling of wells, the lower and cement operating columns, perforined them in the productive interval of the formation and produce a hydrocarbon conventional way the efficiency of the hydrocarbon production and ultimate recovery of oil.

Claims

The way to develop heterogeneous deposits of hydrocarbons, providing the phases of drilling on the area of deposits and production of hydrocarbons through the production well, wherein for deposits, alluvial deposits, at the stage of drilling on the rare grid according to geophysical and core research building map lithological facies sediments of the reservoir, at the same time within floodplain sediments with low permeability and high ruggedness deposits net wells compacted, and within the fluvial deposits net condense on the stage lowerbody hydrocarbon reserves.

 

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EFFECT: higher efficiency.

1 ex

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EFFECT: higher efficiency.

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