Quantitative evaluation of vertical fault transport in Daliuquan area of Langgu sag, Bohai Bay Basin

The ability to transport oil and gas shows differences for different faults or different parts of the same fault. The vertical transportation of oil and gas through faults was evaluated quantitatively and the controls on oil and gas distribution in the Daliuquan area of the Langgu Sag of the Bohai Bay Basin were discussed. Various factors were considered including migration dynamics, hydrocarbon source, and the kinematics and geometric characteristics of faults.Based on confirming source faults, four geological parameters were summarized, including fault activity intensity, abnormal pressure, "transfer station" scale and fault convex ridge scale, all of which have a positive correlation with reserve abundance and can be used to fit a quantitative characterization formula of fault vertical transporting ability as quantitative indexes. Using this formula to evaluate the vertical fault transport ability of the Daliuquan area, this method indicates that the quantitative evaluation results are consistent with the actual geological conditions, which shows that the quantitative characterization method has a good applicability.