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has been cited by the following article:

• TITLE: Diagnostic Method and Adaptability Analysis of Multiple Water Breakthroughs in Horizontal Well in Combined Well Pattern

  AUTHORS: Zheng Lv, Meinan Wang, Guohao Zhang, Rui Zhang, Jianguo Liu

  KEYWORDS: Combined Well Pattern, Multiple Water Breakthroughs in Horizontal, Derivative of Water-Oil Ratio

  JOURNAL NAME: Journal of Geoscience and Environment Protection, Vol.11 No.5, May 30, 2023

  ABSTRACT: The combined well pattern has been widely used in reservoir development, with a common pattern being a horizontal well in the center for oil production and multiple vertical wells around for water injection. For this type of well pattern, determining the horizontal well is affected by which injection wells, especially when the injecting water breaks through, accurately determining the direction of water inflow will provide an important basis for targeted water well measures. Based on the production performance data of horizontal wells, the semi logarithmic relationship curves of water-oil ratio, derivative water-oil ratio, and cumulative production were used for the first time to determine the breakthrough problem of water injection in the surrounding water injection wells of horizontal wells based on their response characteristics. The adaptability of this method under different influencing factors was analyzed. Introducing the parameter of cumulative production not only preserves the variation trend of the derivative of water-oil ratio with time, but also facilitates the processing of actual production data.