An evaluation method of acid fracturing effect based on the theory of acid fracturing "renovation zone"
An evaluation method and acid fracturing technology, applied in data processing applications, manufacturing computing systems, image data processing, etc., can solve the problems of inability to accurately reflect the acid fracturing effect of the construction plan, poor acid fracturing effect, etc., to achieve cost reduction Efficient development, improved accuracy, and improved computing efficiency
Active Publication Date: 2022-07-29
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology
For a long time, when evaluating the effect of acid fracturing, petroleum engineers mainly focused on the stimulation effect of acid-etched fractures on oil and gas wells. By considering the influence of acid-etched fractures on fracture conductivity, fracture shape and fracture effective length, the reservoir The reliability of the evaluation of acid fracturing construction effect, but ignores the reformed area formed by the dissolution of the acid fluid leaked along the acid-etched fractures in the reservoir matrix, and the improvement of seepage mode and production increase in the reformed area, so its obtained The acid fracturing effect is different from the actual acid fracturing effect of the construction plan, and cannot accurately reflect the real acid fracturing effect of the construction plan
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[0094] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments in the present application and the technical features in the embodiments may be combined with each other under the condition of no conflict. 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 one of ordinary skill in the art to which this application belongs. The use of "comprising" or "comprising" and similar words in the present disclosure means that the elements or things appearing before the word encompass the elements or things listed after the word and their equivalents, but do not exclude other elements or things.
[0095] The invention provides an acid fracturing effect evaluation method based on the acid fracturing "reconstruction zone" theory, comprising the following steps:
[0096] S1: Build a s...
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The invention discloses an acid fracturing effect evaluation method based on the acid fracturing "reformation zone" theory, which belongs to the technical field of oil and gas field development. The evaluation method includes the following steps: establishing a structured reservoir grid and adding initial artificial fractures; establishing Considering the fracture propagation model of the acid fracturing area, carry out numerical simulation according to the fracture propagation model to obtain the seepage-related parameters during the acid fracturing operation; establish a gas well production model, and calculate the pore distribution and liquid phase saturation of the reservoir during the gas well production process degree distribution; calculate the cumulative production of the gas well, and use this to calculate the cumulative production multiplication ratio of the construction plan. The larger the cumulative production multiplication ratio, the better the acid fracturing effect. The invention additionally considers the improvement of the seepage pattern of the "reformation area" near the acid-etched fractures by the acid solution, and on this basis, predicts the cumulative production and conducts the acid fracturing effect evaluation, which can effectively improve the accuracy of the acid fracturing effect evaluation and help Realize the cost reduction and efficiency increase development of carbonate reservoirs.
Description
technical field [0001] The invention relates to the technical field of oil and gas field development, in particular to an acid fracturing effect evaluation method based on the acid fracturing "reformation zone" theory. Background technique [0002] Acidizing construction relies on acid fluid to filter out into the reservoir matrix and dissolve minerals to improve matrix permeability, thereby forming a stimulation zone near the wellbore. Acid fracturing relies on hydraulic rock breaking and forms heterogeneous etching on the walls of artificial fractures, so that acid-etched fractures with certain conductivity can be formed after liquid flowback and fracture closure to increase production. For a long time, when evaluating the effect of acid fracturing, petroleum engineers have mainly focused on the stimulation effect of acid-etched fractures on oil and gas wells. The credibility of the evaluation of the effect of acid fracturing is ignored, while the stimulation area formed ...
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IPC IPC(8): G06F30/20G06F30/10G06Q10/06G06Q50/04G06T17/20G06F111/10G06F113/08G06F119/14
CPCG06F30/20G06F30/10G06T17/205G06Q10/0639G06Q50/04G06F2111/10G06F2113/08G06F2119/14Y02P90/30G06F30/28E21B43/26E21B2200/20
Inventor 彭瑀史鹏君李勇明骆昂常泰
Owner SOUTHWEST PETROLEUM UNIV