Alternating exploitation method and device of apparent five-point method facing horizontal well pattern
A mining method and technology for horizontal wells, which are applied in the fields of production fluids, wellbore/well components, earth-moving drilling, etc., can solve the problems of large economic costs and limited effect of water injection development effect improvement.
Inactive Publication Date: 2020-04-24
PETROCHINA CO LTD
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Problems solved by technology
For old oil fields that have been exploited by horizontal wells for many years, these measures have limited effect on improving the effect of water flooding development, and the adjustment of well pattern intensification requires a large amount of economic cost
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[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention. 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 arbitrarily with each other.
[0031] In order to facilitate the understanding of the technical solution provided by the present application, a brief description of the research background of the technical solution of the present application is given below. Generally speaking, there are various adjustment methods for vertical well patterns, and the water injection development effect of vertical well patterns can be improved ...
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The invention provides an alternating exploitation method and device of an apparent five-point method facing a horizontal well pattern. The method comprises the following steps that the horizontal well pattern is controlled to execute a first oil exploitation step in a first operation cycle, wherein the horizontal well pattern is preset and includes at least three rows and three columns of injection and production wells; and the horizontal well pattern is controlled to execute a second oil exploitation step in a second operation cycle. The first oil exploitation step includes closing odd-numbered columns of water injection wells and opening even-numbered columns of water injection wells, and closing even-numbered columns of oil production wells and opening odd-numbered columns of oil production wells. The second oil exploitation step includes closing the even-numbered columns of water injection wells and opening the odd-numbered columns of water injection wells, and closing the odd-numbered columns of oil production wells and opening the even-numbered columns of oil production wells. The first oil exploitation step and the second oil exploitation step are alternately performed. Thedevice is used for executing the method. By means of the alternating exploitation method and device of the apparent five-point method facing the horizontal well pattern, the sweep efficiency and theoil field recovery ratio are increased.
Description
technical field [0001] The invention relates to the technical field of petroleum exploitation, in particular to a method and device for alternately exploiting by the five-point-of-view method facing the well pattern of a horizontal well. Background technique [0002] In recent years, the technology of horizontal well water injection to enhance oil recovery has been widely used. Using horizontal well pattern water injection, the longer horizontal section increases the contact area between the well and the reservoir, reduces the flow resistance of injected water, and forms a linear drive, which helps the water line to advance evenly, reduces interlayer conflicts, and delays water injection Breakthrough time and improve sweep efficiency, thus effectively improving reservoir development effect. [0003] When horizontal well patterns are used for water injection, the deployment of linear facing or staggered well patterns is often used. Among them, the injection-production strea...
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IPC IPC(8): E21B43/20E21B43/30
CPCE21B43/20E21B43/305
Inventor 宋新民李勇赵丽敏王舒孙亮
Owner PETROCHINA CO LTD