Fractured-vuggy carbonate rock oil reservoir single-well water injection oil displacement method and device
A technology for carbonate rock reservoirs and carbonate rocks, which is applied in earthwork drilling, wellbore/well components, production fluids, etc., and can solve problems such as inability to apply production processes, unclear production parameters of water injection parameters, etc. question
Inactive Publication Date: 2019-07-30
PETROCHINA CO LTD
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However, since the various parameters of water injection at the construction site and the reasonable production parameters after water injection are not clear, the improvement of crude oil production through single well water injection technology has defects and cannot be applied to the actual production process
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[0041] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present disclosure as recited in the appended claims.
[0042] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the present invention and the above drawings are used to distinguish similar objects and not necessarily Describe a specific order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the invention d...
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The invention provides a fractured-vuggy carbonate rock oil reservoir single-well water injection oil displacement method and device. The fractured-vuggy carbonate rock oil reservoir single-well waterinjection oil displacement method comprises the steps that a to-be-produced fractured-vuggy carbonate rock oil well is determined; at the preset water injection time, the preset volume of water is injected into the fractured-vuggy carbonate rock oil well at the preset water injection speed and the preset water injection pressure; and the fractured-vuggy carbonate rock oil well with the injected water is subjected to well soaking treatment, and the fractured-vuggy carbonate rock oil well is produced according to the preset injection-production ratio. According to the fractured-vuggy carbonaterock oil reservoir single-well water injection oil displacement method and device, the recovery rate of crude oil is increased.
Description
technical field [0001] The invention relates to the technical field of enhanced crude oil recovery in oilfields, in particular to a method and a device for replacing oil by injecting water into a single well in a fractured-cavity carbonate reservoir. Background technique [0002] Fracture-cavity carbonate reservoir structures mainly include three types: cave type, vug type, and fracture type. Cave-type reservoirs with a diameter greater than 100 mm are usually formed by karstification of faults superimposed on mound-shoal bodies. Vuggy reservoirs refer to generally visible dissolution pores with a diameter of 2 mm to 100 mm, which appear as irregular dark spots on imaging logging images. [0003] For fractured-cavity carbonate rocks, fractured-vuggy carbonate reservoirs have high initial spontaneous eruption production, no water production or low water content, but the production declines rapidly and the energy decays rapidly. When the formation energy depletes to a certain...
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CPCE21B43/20
Inventor 江同文阳建平陶正武周代余刘志良伍藏原郭宇恒费发奇黄召庭王勇李志强赵玉龙张键周登洪赵冀韩涛汪鹏马群赵行
Owner PETROCHINA CO LTD