A method for tapping the reserve potential of far wells in fractured-vuggy reservoirs
A fracture-cavity, far-well technology, applied in earthwork drilling, wellbore/well components, instruments, etc., can solve problems such as reservoir parameter damage, poor flow conductivity, unfavorable preferential production of far-well reserves, etc., to achieve The effect of improving productivity
Active Publication Date: 2022-02-22
SOUTHWEST PETROLEUM UNIV
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[0005] The embodiment of the present invention provides a method for tapping the reserve potential of a fractured-vuggy reservoir at a distance, which can solve the problem of closing of fractures connected to the second reservoir in the reservoir due to too low energy in the far well during the development of the fractured-cavity reservoir in the prior art. The conductivity will become worse, and the reservoir parameters will be destroyed, which is not conducive to the problem of prioritizing the production of remote well reserves
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[0051] Below will combine the appended in the embodiment of the present invention figure 1 to attach Figure 4 , clearly and completely describe the technical solutions in the embodiments of the present invention, obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0052] Taking Block A of the fractured-cavity reservoir in Tarim Oilfield as an example, the present invention provides a method for tapping the reserve potential of the far-well reservoir of the fracture-cavity reservoir:
[0053] S1. Establish water injection indication curves, energy indication curves, liquid level recovery curves and well test indication curves for fractures and caves;
[0054] S2. Determine the reservoir structure according...
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The invention relates to a method for tapping the potential of far-well reserves in a fracture-cavity reservoir. The method includes the following steps: establishing a water injection indication curve, an energy indication curve, a liquid level recovery curve and a well test indication curve, and judging according to the curve shape characteristics of the four curves Reservoir structure: Obtain the fracture initiation pressure difference of reservoir parameters according to the water injection indication curve and energy indication curve, and obtain the far-well energy according to the liquid level recovery curve; respectively draw the relationship between high-pressure water injection replacement oil volume, fracture initiation pressure difference, and far-well energy Fig. 1. Determine the critical value of fracture initiation pressure difference and the critical value of far-well energy according to the two relationship diagrams; When determining the potential of far-well reserves in fractured-vuggy reservoirs, implement high-pressure water injection or deep permeable acidification or high-pressure water injection to deepen permeable acidification. The potential tapping method of the present invention improves the conductivity of fractures, enables effective production of far-well reserves, and improves production efficiency. promote.
Description
technical field [0001] The invention relates to the technical field of oilfield development, in particular to a method for tapping the potential of far-well reserves in fracture-cavity oil reservoirs. Background technique [0002] Today's world demand for energy has been increasing, and fracture-cavity carbonate reservoirs account for about 50% of the total crude oil reserves, and the development prospects are very broad. Among the global fracture-cavity carbonate reservoirs, fracture-dissolved-cavity reservoirs account for about 30%. This type of reservoir generally has both fractures and pores. Therefore, fracture-cavity carbonate reservoirs The rational development of oil reservoirs has become one of the focuses of my country's and even the world's petroleum industry, and there is a long way to go for the effective development and utilization of such oil reservoirs. [0003] Fractured-cavity carbonate reservoirs are a special type of reservoirs, with karst fractures and c...
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IPC IPC(8): E21B43/20E21B43/22E21B43/26E21B43/27G06F30/20G06Q50/02
CPCE21B43/20E21B43/26G06Q50/02G06F30/20
Inventor 蒋贝贝蒋沙沙杨乾隆马欣袁飞宇李迎恩李海涛许强
Owner SOUTHWEST PETROLEUM UNIV