渤海锦州20-2凝析气田开发实践

Development Practice of Bohai Jinzhou20-2 Condensate Field

锦州20-2凝析气田为异常高压凝析气藏,气田构造上分为三个高点,各自为独立的油气水系统。由于凝析油含量中等,确定气田采用衰竭开发方式进行开发。油田采取分期投产、产能接替和钻调整井等措施保持气田平稳供气。由于气田局部具边底油,气田投产后陆续有气井出黑油或出水,气井的合理管理显得尤为重要。通过无阻流量等方法对高产气井进行合理产量分析,维持高产气井的稳产。对出黑油未出水气井适当放大压差,维持气井稳定生产;而出水气井则根据井筒积液情况及时调整产气量,保证气井连续生产。同时在边底油丰度高的区域设计两口水平井开发油环原油,有效提高了原油和天然气产量,改善气田开发效果。

Jinzhou20-2 condensate field is characteristic of abnormal pressure,with three structural high points and different fluid system respectively.Some effective measurements,including development on stage,productivity replacement and drilling adjustment well,are taken to keep smooth and steady production output.Some gas wells produce black oil or water after put into production for the present of local edge and basal oil in the formation of the gas field,so reasonable well management is of special significance.According to the absolute open flow calculation result,the production of different type of gas well is allocated to maintain high efficiency.Drawdown pressure is increased for those gas wells which produce black oil only to keep steady production.As for the wells that produce water,the production output is adjusted without delay according to the liquid loading to guarantee continuous production.At the same time,two horizontal wells is designed to extract oil ring at the scope of abundant edge and basal oil area,and as a result,the production of the gas field is increased and its development effectiveness has been enhanced enormously.