Oil and gas quantitative identification method and system for complex fault block oil-gas reservoir
A complex fault block and quantitative identification technology, applied in the field of oil and gas exploration, can solve the problems of high cost of nuclear magnetic logging, inability to distinguish oil and gas in the same layer, and inability to apply, to reduce useless or repetitive information, easy to implement, and low cost.
Pending Publication Date: 2022-02-25
PETROCHINA CO LTD
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Problems solved by technology
NMR logging has a good effect in distinguishing oil and gas, but NMR logging is expensive and slow, and it is only measured in some wells; it is effective in distinguishing oil and gas based on the compensation neutron excavation effect, but it cannot distinguish oil and gas in the same layer; The oil and gas operation is simple and the effect is good, but for wells lacking gas logging data, this method cannot be applied
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[0051] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below in conjunction with the drawings of the embodiments of the present application. Apparently, the described embodiments are some of the embodiments of the present application, but not all of them. Based on the described embodiments of the present application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.
[0052] refer to figure 1 , in some embodiments, the method for quantitative identification of oil and gas in complex fault block oil and gas reservoirs includes:
[0053] S101. Obtain production logging data of production wells and evaluation logging data of multiple evaluation wells, where the production logging data and...
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The invention relates to the technical field of oil-gas exploration and discloses an oil-gas quantitative identification method and system for a complex fault block oil-gas reservoir. The method comprises steps of obtaining production logging data of a production well and evaluation logging data of a plurality of evaluation wells; the production well serving as a target well, and the production well logging data and the evaluation well logging data being inputted into an oil-gas exponential function to obtain production oil-gas index data of the production well; substituting the production oil-gas index data into a gas-oil ratio function to obtain production gas-oil ratio data; and comparing the production gas-oil ratio data with the oil-gas property discrimination standard, and determining the oil-gas property of the production well production layer. According to the method, well logging response characteristics of an oil and gas reservoir in a complex fault block oil and gas system are fully analyzed, the thought of well logging information reconstruction is applied, useless or repeated information is reduced, an oil and gas index curve is obtained by searching for oil and gas sensitive factors, a gas-oil ratio calculation formula is established in combination with the production gas-oil ratio, therefore, the oil layer, the gas layer and the oil-gas same layer in the complex oil-gas system can be quickly and accurately identified.
Description
technical field [0001] The invention relates to the technical field of oil and gas exploration, in particular to a method and system for quantitative identification of oil and gas in complex fault block oil and gas reservoirs. Background technique [0002] With the continuous development of exploration technology and geological theory, in addition to new discoveries made in conventional oil and gas exploration, major breakthroughs have also been made in the exploration of oil and gas resources in complex fault blocks. Complex fault-block oil and gas reservoirs are complex in structure, and multiple sets of oil and gas systems are superimposed on each other in the vertical direction, so it is difficult to accurately identify oil layers, oil and gas layers, and gas layers. The exploitation of oil-to-oil ratio reservoirs leads to a rapid drop in formation pressure of oil and gas reservoirs, and these factors affect the efficiency of oilfield exploration and development. There ...
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Login to View More IPC IPC(8): E21B47/00E21B49/00
CPCE21B47/00E21B49/00E21B2200/20
Inventor 房国庆隋秀英王宏磊张凤生王勇赵莉李建忠邓帆孙晓明侯欢
Owner PETROCHINA CO LTD