Well pattern structure for oil reservoir gas injection development and oil production method
A technology for gas injection wells and oil reservoirs, which is applied in the direction of production fluid, earthwork drilling, wellbore/well components, etc. It can solve problems such as poor development effect, difficulty in establishing an effective displacement system, water channeling, etc., and achieve enhanced oil recovery rate effect
Inactive Publication Date: 2020-12-01
PETROCHINA CO LTD
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[0005] However, for most ultra-low permeability reservoirs, due to the poor physical properties and strong sensitivity of the reservoir, water channeling and water injection failure are prone to occur during water injection development, making it difficult to establish an effective displacement system. Inefficient development stage, poor development effect
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[0023] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0024] Such as figure 1 and figure 2 As shown, the present invention provides a well pattern structure for reservoir gas injection development, including a first well row 110 , a second well row 120 and a third well row 130 . The first well row 110 includes a plurality of first gas injection wells 11 and a plurality of first oil production wells 12 , and a first oil production well 12 is arranged between two adjacent first gas injection wells 11 . The second well row 120 is arranged in parallel with the first well row 110 at intervals. The second well row 120 includes a plurality of second gas injection wells 21 and a plurality of second oil production wells 22. There is one between two adja...
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The invention provides a well pattern structure for oil reservoir gas injection development and an oil production method. The well pattern structure for oil reservoir gas injection development comprises a first well array, a second well array and a third well array; the first well array comprises a plurality of first gas injection wells and a plurality of first oil production wells, and each firstoil production well is arranged between every two corresponding adjacent first gas injection wells; the second well array and the first well array are parallelly arranged in a spaced mode, the secondwell array comprises a plurality of second gas injection wells and a plurality of second oil production wells, each second oil production well is arranged between every two corresponding adjacent second gas injection wells, the multiple second gas injection wells correspond to the multiple first oil production wells in position, and the multiple second oil production wells correspond to the multiple first gas injection wells in position; and the third well array and the second well array are arranged parallelly arranged in a spaced mode, the third well array comprises a plurality of third oilproduction wells, and the multiple third oil production wells correspond to the multiple second gas injection wells and the multiple second oil production wells in position one to one. According to the embodiments of the well pattern structure for oil reservoir gas injection development and the oil production method, effective use of an ultra-low-permeability reservoir can be realized, and the crude oil recovery ratio is increased.
Description
technical field [0001] The invention relates to the technical field of oil reservoir development, in particular to a well pattern structure and an oil production method for gas injection development of an oil reservoir. Background technique [0002] Oil and gas need a certain amount of energy to drive it from the oil layer to the well and rise to the ground. The conditions for this energy to exist in each oil reservoir are different. Generally speaking, in an oil and gas reservoir, due to the formation pressure, both oil, gas and rock have certain elastic energy. These natural energies in the reservoir can function well in the initial stage of reservoir development, and should be fully utilized in oilfield development. The exploitation of natural energy is to use the driving energy of the reservoir itself for development, but practice tells us that the natural energy in an oil reservoir is limited and the driving energy is weak; moreover, the natural driving energy can The...
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IPC IPC(8): E21B43/30E21B43/16
CPCE21B43/30E21B43/168
Inventor 董凤龙阴艳芳范俊李春艳姜李佳一高丽张晓露张溪高彬方红
Owner PETROCHINA CO LTD