Fire flooding development method of w-shaped well pattern in multi-layer water-flooded reservoir
A water flooding and well pattern technology, which is applied in the direction of mining fluid, earthwork drilling, wellbore/well components, etc., can solve the problems of uneven effect, obvious gas channeling, etc., achieve novel well pattern design, reduce production cost, Manageable Effects
Active Publication Date: 2020-11-03
PETROCHINA CO LTD
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[0006] The purpose of the present invention is to provide a fire flooding development method of W-shaped well pattern in multi-layer water flooded oil reservoirs, which can overcome the problems of uneven effect and obvious gas channeling in the prior art, and the method can effectively inhibit gas channeling of production wells , reduce the non-uniform effect of fire flooding, and can effectively reduce field investment, providing another way for the next step of multi-layer water-flooded reservoir development
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[0027] In a certain multi-layer water-flooded reservoir test area, implement the multi-layer water-flooded reservoir W-type well pattern fire flooding development method of the present invention, the specific implementation process is as follows:
[0028] Step a, drawing the oilfield geological development well location map, and marking the water-flooded intensity and water-flooded sub-layer data according to the water-flooded area of the oil reservoir;
[0029] Step b, connecting the contour positions in the geological development well map of the oilfield to form multi-level contour lines;
[0030] Step c, find out the high point and low point in the geological development well position, use the contour line and water flooding distribution law, set the W-shaped well pattern on the 4 contour lines (the specific series of the contour line can be determined according to the production actually determined), 5 injection wells are determined, among which 3 high-level injection we...
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The invention relates to a multi-layer waterflooded oil reservoir W-shaped well network fireflooding development method. The multi-layer waterflooded oil reservoir W-shaped well network fireflooding development method comprises the steps that a, an oilfield geological development well position map is drawn, the waterflooded intensity and waterflooded small layer data are marked and drawn accordingto an oil reservoir waterflooded area; b, equal-height positions in the oilfield geological development well position map are connected to form a multi-stage equal-height line; c, high points and lowpoints in geological development well positions are found out, injection wells of a W-shaped well network and corresponding waterflooded small layer production wells are determined through the equal-height line and the waterflooding distribution law, and thus the W-shaped well network is constituted; and d, fireflooding development is conducted on site according to the W-shaped well network. According to the multi-layer waterflooded oil reservoir W-shaped well network fireflooding development method, gas channeling of the productions wells can be effectively inhibited, the phenomenon of uneven effect of fireflooding is reduced, on-site input can be effectively reduced, and another way is provided for next multi-layer waterflooded oil reservoir development.
Description
technical field [0001] The invention relates to the technical field of oil field development, in particular to a fire flooding development method of a W-shaped well pattern in a multi-layer water flooded oil reservoir. Background technique [0002] Fire flooding is a recovery technology that can greatly increase the recovery of heavy oil reservoirs. Fire flooding is to use the heavy components in the formation crude oil as fuel, use air or oxygen-enriched gas as a combustion aid, and adopt spontaneous combustion and artificial ignition. The temperature of the oil layer reaches the ignition point of crude oil, and continuous injection of combustion accelerant, so that the crude oil in the oil layer continues to burn, and the combustion reaction generates a large amount of heat, heating the oil layer, so that the temperature of the oil layer rises to 600-700 °C, and the heavy components are cracked at high temperature. Injected gas, light oil from heavy oil cracking, gas from ...
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IPC IPC(8): E21B43/243E21B43/14E21B43/30
CPCE21B43/14E21B43/243E21B43/30
Inventor 贾财华马春宝崔洪志李青张威程彦符蒋明姜英鹏贾代鹏
Owner PETROCHINA CO LTD