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.