A new calculation approach of wellbore separation factor based on the relative position of adjacent wells

HONG Difeng,TANG Xueping,GAO Wenkai,MAO Weimin,WANG Peng,LIU Ke

Table 1 Correlation coefficients of random variables corresponding to five types of error terms.

Type Conditions Correlation coefficient Random error Same error term in the same well 0 Same error term in different wells 0 Different error terms 0 Systematic error Same error term in the same well with the same measurement tool 1 Same error term in the same well with different measurement tools 0 Same error term in different wells 0 Different error terms 0 Well-by- well error Same error term in the same well 1 Same error term in different wells 0 Different error terms 0 Global error Same error term in the same well 1 Same error term in different wells 1 Different error terms 0 Survey bias Same error term in the same well 1 Same error term in different wells 1 Different error terms 1