Correlation between per-well average dynamic reserves and initial absolute open flow potential (AOFP) for large gas fields in China and its application

摘要

Based on performance data of over 600 wells in 32 large gas fields of different types in China, the correlation is established between per-well average dynamic reserves (Gˉ) and average initial absolute open flow potential (qˉIAOF) of each field, and its connotation and applicability are further discussed through theoretical deduction. In log-log plot,Gˉvs.qˉIAOFexhibit highly dependent linear trend, which implicates the compatibility betweenGˉandqˉIAOFattained through development optimization to reach the balance among annual flow capacity, maximum profits and certain production plateau, that is to match productivity with rate maintenance capacity. The correlation can be used as analogue in new gas field development planning to evaluate the minimum dynamic reserves which meet the requirement of stable and profitable production, and facilitate well pattern arrangement. It can also serve as criteria to appraise the effectiveness and infill drilling potential of well patterns for developed gas fields.