試井分析中的半對數解釋方法是基于不穩定滲流的徑向流理論，而壓力及導數雙對數擬合試井分析是基于計算典型曲線圖版，這兩種方法都需要生產及關井時間達到徑向流，對于低滲透油氣藏在有效的測試時間內，很難滿足這個要求。軟件采用早期小信號提取及放大的試井分析方法，節約了關井測試時間，可以提高資料解釋率和壓力資料解釋精度，從而降低成本、增加產量。早期試井分析已在現場得到應用驗證。
對低滲透油氣田，由于采用早期小信號提取及放大技術，解決了不出現徑向流的壓力資料解釋問題。
通過圖版擬合可解釋地層滲透率及表皮等，減少試井分析的多解性。
在早期數據采樣點較密且數據不凌亂的情況下，可縮短關井時間。
可以與導數曲線聯合進行分析，提高資料解釋的精度。
 圖1 早期試井圖
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 圖2 某井例早期擬合圖
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The semi-logarithmic interpretation method in well testing analysis is based on the radial flow theory of unstable seepage, while the pressure and derivative double logarithmic simulation well testing analysis is based on the calculation of typical curve chart. Both methods require the production and shut-in time to reach the radial flow. It is difficult to meet this requirement for the low permeability oil and gas reservoir within the effective testing time. The software uses the early small signal extraction and amplification well testing analysis method, which saves the shut-in test time, improves the data interpretation rate and the pressure data interpretation accuracy, thus reduces the cost and increases the output. Early well testing analysis has been applied and verified in field.
For low permeability oil and gas fields, the problem of pressure
data interpretation without radial flow is solved by using early small signal extraction and
amplification technology.
The formation permeability, skin and so on can be explained by
chart simulation, and the multiple solutions of well testing analysis can be reduced.
Under the condition that the early data sampling points are dense
and the data is not messy, the well shut-in time can be shortened.
It can be analyzed with derivative curve to improve the accuracy
of data interpretation.
| Figure1: Early well
testing chart |
Figure2: Early
simulation chart of a well |
