Perforating methods and devices
A technology of oil-producing layers and characteristic parameters, which is applied in the direction of earthwork drilling, wellbore/well components, production fluid, etc., can solve the problems of poor perforation effect and low recovery efficiency, so as to improve production degree and recovery rate Effect
Active Publication Date: 2020-11-03
PETROCHINA CO LTD
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[0005] The embodiment of the present application provides a perforation method and device to solve the technical problems of poor perforation effect and low recovery efficiency in the existing methods, and to improve the production degree of each oil-producing layer through graded perforation. And then improve the technical effect of the recovery factor of the target well
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[0037] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.
[0038] Considering the existing methods, the heterogeneity difference in the vertical direction of different oil-producing layers in the oil well is often not carefully analyzed, and the difference in the vapor absorption capacity of different oil-producing layers is not taken into account. Different oil-producing layers are usually not disti...
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The embodiment of the invention provides a perforation method and device. The perforation method comprises the steps that characteristic parameters of oil producing layers in a target well are obtained; the steam absorption capacity grade of the oil producing layers is determined according to the characteristic parameters of the oil producing layers; and the oil producing layers are perforated according to the steam absorption capacity grade of the oil producing layers. According to the perforation method, the characteristic parameters of all the oil producing layers in the target well are obtained firstly, the heterogeneity difference between the oil producing layers is analyzed according to the characteristic parameters of the oil producing layers, then the steam absorption capacity grade of the oil producing layers is determined, then perforation is conducted in a corresponding mode according to the steam absorption capacity grade of the different oil producing layers, thus the technical problems that an existing method is poor in perforation effect and low in recovery rate are solved, and the technical effects that through graded perforation, the producing degree of all the oilproducing layers is increased, and then the recovery rate of the target well is increased are achieved.
Description
technical field [0001] The present application relates to the technical field of oil and gas development, in particular to a perforation method and device. Background technique [0002] During oil and gas production, it is usually necessary to perforate the target well. For example, when steam huff and puff is used to recover heavy oil, it is often necessary to perforate the oil-producing layers (or oil layers) superimposed on each other vertically by steam huff and puff wells, so as to increase the productivity of steam huff and puff oil recovery and achieve the purpose of increasing production. [0003] At present, most of the existing methods are to uniformly perforate each oil-producing layer in the target well without distinction. However, there are often differences in heterogeneity in the vertical direction between different oil producing layers in an oil well, resulting in different vapor absorption capabilities of different oil producing layers. According to the e...
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IPC IPC(8): E21B43/11E21B43/24
CPCE21B43/11E21B43/24
Inventor 任德强范加兴李君安九泉张滕张祥成杨宝春刘涛张颖喜恒坤黄兴国王磊许俊岩张健屈振哲蒋雪黄智席春婷吴迪宋昊霖祝云昭邓杰夫王伟孙鹿恒
Owner PETROCHINA CO LTD