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A fast well-seismic calibration method under the condition of dense well pattern

A technology of well seismic calibration and well pattern, applied in seismology for well logging records, etc., can solve the problems of heavy workload, affecting the effect of development and application, and slow speed, so as to ensure application effect, ensure stable production, and increase speed Effect

Active Publication Date: 2022-03-22
DAQING OILFIELD CO LTD +1
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Problems solved by technology

[0004] The present invention aims to overcome the problems of the existing well seismic calibration method in the background technology that the speed is slow, and that under the condition of dense well pattern, it will cause a large workload and affect the effect of subsequent development and application, and provide a fast well calibration method under the condition of dense well pattern Seismic Calibration Method

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  • A fast well-seismic calibration method under the condition of dense well pattern
  • A fast well-seismic calibration method under the condition of dense well pattern
  • A fast well-seismic calibration method under the condition of dense well pattern

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Embodiment 1

[0028] Taking the North Erxi Block of Daqing Oilfield as an example, there are a total of 2,000 wells in the North Erxi Block, such as figure 1 As shown, the rapid well seismic calibration method for studying dense well pattern is divided into four steps:

[0029] The first step is to uniformly select 1 / 10 of the wells in the block (a total of 2,000 wells in the Beierxi block, 200 wells are selected), and conduct actual measurements on 200 wells to obtain the acoustic wave curve and density curve in the depth domain; Multiply the acoustic wave curve and the density curve obtained in the first step to obtain the P-wave impedance curve in the depth domain, and then perform convolution operation on the P-wave impedance curve and the wavelet to obtain the single-well synthetic seismic records in the depth domain of 200 wells, as shown in figure 2 shown;

[0030] The second step is to adjust the single well depth-domain synthetic seismic record produced in step (1), conduct seism...

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Abstract

The invention relates to a fast well seismic calibration method under the condition of dense well pattern. It mainly solves the problems that the existing well seismic calibration method is slow, and under the condition of dense well pattern, it will affect the efficiency of subsequent development and application. It is characterized in that: 1) Evenly select 1 / 10‑1 / 4 of the total number of wells in the study area to drill wells to make synthetic seismic records in the depth domain of a single well; 2) Adjust the synthetic seismic records in the depth domain of a single well to establish the time and depth of a single well 3) Convert the geological horizon of a single well from the depth domain to the time domain to establish a time-domain geological horizon model; 4) Automatically match the remaining drilling horizons in the study area to the time-domain geological horizon model, So as to realize the fast well seismic calibration work of all drilling wells. The well seismic calibration method can improve the well seismic calibration speed under the premise of ensuring the well seismic calibration accuracy.

Description

technical field [0001] The invention relates to the technical field of oilfield development, in particular to a fast well seismic calibration method under dense well pattern conditions. Background technique [0002] The "dense well pattern" involved in the patent of the present invention means that the number of wells drilled is greater than 50 wells per square kilometer. At present, many old oil fields in China, including Daqing Oilfield, Liaohe Oilfield, Jilin Oilfield, etc., all meet the conditions of dense well pattern . At present, in the field of petroleum development, the combination of drilling data and seismic data has become a common technology for oil field development. However, since drilling data belongs to the depth domain, seismic data belongs to the time domain, so in order to classify the drilling data and seismic data into the same domain , the well seismic calibration must be carried out. [0003] At present, there are two types of well seismic calibrati...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/40
CPCG01V1/40
Inventor 徐立恒朱权梁宇杨会东李红星周华建齐金成庞春红
Owner DAQING OILFIELD CO LTD
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