Tight oil reservoir horizontal well post-fracturing segmented well testing analysis method based on fracturing tracing constraints

Abstract

The invention discloses a tight oil reservoir horizontal well post-fracturing segmented well testing analysis method based on fracturing tracing constraints, which comprises the following steps: in the fracturing process, obtaining concentration extraction curves of different tracers of ground flowback, and further obtaining variable production data; converting the obtained variable production data in each section of the horizontal well into fixed production data by utilizing a fracturing tracer flow interpretation model under the deconvolution constraint; determining a single infinite and limited flow guide vertical fracture horizontal well test model based on the fracturing tracing constraint by utilizing the fixed production data, and obtaining stratum parameters of each section of the horizontal well by utilizing the single infinite and limited flow guide vertical fracture horizontal well test model based on the fracturing tracing constraint; and according to the obtained stratum related parameters of each section of the horizontal well, drawing an output condition graph of each section of the oil reservoir horizontal well, calculating the contribution rate of each section of the horizontal well and obtaining stratum information of the whole section of the horizontal well. According to the method, the limitation of a conventional single monitoring means is overcome, and combined constraint explanation of multiple monitoring means is realized.

Description

technical field [0001] The invention relates to the field of petroleum engineering, in particular to a segmented well test analysis method for horizontal wells in tight oil reservoirs after fracturing based on fracturing trace constraints. Background technique [0002] Tight oil and gas resources in my country have the characteristics of wide distribution, large reserves, great potential and broad prospects. After the research and exploration of many scientific and technical personnel, technologies such as horizontal well staged fracturing have become powerful tools for the development of such oil and gas fields, and an important way to improve the recovery rate of oil and gas fields and the comprehensive benefits of oil field exploration and development. After the large-scale reconstruction of the reservoir, it is necessary to scientifically formulate a reasonable production system and maximize benefits by accurately and effectively obtaining the half-length of the fracturi...

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Problems solved by technology

After in-depth research, it is found that the fracturing tracer monitoring technology is one of the important means of formation production evaluation. It is of great significance in estimating the fracture conductivity and evaluating the efficiency of staged fracturing, but it cannot realize the analysis of fractures. Quantitative characterization and acquisition of parameters are relatively simple; well testing can obtain more parameters, determine well production capacity, and study reservoir parameters and reservoir performance. The interpretation results have more uncertainty and multi-solution

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