Quantitative evaluation method for oil-gas well production increasing potential
A quantitative evaluation and technology of oil and gas wells, applied in the field of oil and gas field exploration and development, can solve the problems that the productivity increase of low-yield and low-efficiency wells cannot be quantitatively evaluated, and the production potential of low-yield and low-efficiency wells cannot be quantitatively described.
Pending Publication Date: 2021-03-26
PETROCHINA CO LTD
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Problems solved by technology
When the above two patents analyzed the causes of low-yield and low-efficiency wells in the early stage, they could not quantitatively describe the production stimulation potential of low-yield and low-efficiency wells, and they could not quantitatively evaluate the productivity increase of low-yield and low-efficiency wells after the implementation of stimulation measures.
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[0038] 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.
[0039] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by those of ordinary skill in the art to which this application belongs.
[0040] In the present invention, unless stated otherwise, the used orientation words such as "upper, lower, top, bottom" are usually for the directions shown in the drawings, or for the parts themselves in the vertical, In terms of vertical or gravitational direction; similarly, for the convenience of understanding and description, "inner and outer" refer to the inner and outer relative to the outline of each component itself, but the above orientation words ...
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The invention provides a quantitative evaluation method for the production increasing potential of an oil-gas well. The quantitative evaluation method comprises the following steps: S10, establishinga binomial productivity model between theoretical permeability K of a stratum and natural gas production qg according to a binomial productivity theoretical equation of a stable point; S20, correctingthe effective permeability K1 of the stratum, so that the corrected dynamic permeability K'and the effective permeability K1 meet the exponential relation; S30, substituting the corrected dynamic permeability K' into the binomial productivity model to obtain a relational expression between the effective permeability K1 of the stratum and the natural gas production rate qg; S40, under different production pressure differences, drawing a relation curve between the effective permeability K1 of the stratum and the natural gas production rate qg, and establishing an oil and gas well productivity evaluation model chart; and S50, evaluating the production increasing capacity of the oil and gas well according to the oil and gas well productivity evaluation model chart. According to the technicalscheme, the oil-gas well production increasing capacity can be quantitatively evaluated.
Description
technical field [0001] The invention relates to the technical field of oil and gas field exploration and development, in particular to a method for quantitatively evaluating the production potential of oil and gas wells. Background technique [0002] In the technical field of oil and gas field exploration and development, those skilled in the art usually define wells producing less than 1 ton of oil and gas equivalent as low-yield and low-efficiency wells. After years of development, the output of a large number of oil and gas wells has decreased in oil and gas equivalent, and eventually turned into low-yield and low-efficiency wells. %, there is still room for improvement in its recovery. In addition, due to the reduction of oil and gas equivalent output, the assets invested in oil production equipment and pipe strings will not benefit, which greatly increases investment costs and restricts the subsequent development of oil and gas fields. Therefore, the production stimul...
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Login to View More IPC IPC(8): G06Q10/06G06Q50/02G06F17/12
CPCG06Q10/0639G06F17/12G06Q50/02
Inventor 王泉陈超李道清王彬廖伟张士杰鲍颖俊
Owner PETROCHINA CO LTD