nine-spot

In the initial stage of development , the inverted nine-spot pattern has been used widely .

开发初期大多采用了正方形，九点井网注水方式开发。

The inverted nine-spot rhombus pattern has two adjustable directions of well array .

菱形反九点井网有两个可调的井排方向，是适合于裂缝和砂体方向性明显油藏的最佳井网。

Adjusted the well pattern from inverted nine-spot to five-spot will improve the oil production and recovery .

将反九点井网调整为五点井网可以提高油田开发效果；

Conclusion By adopting skewed nine-spot pattern , leading water injection , clay stabilizer and wettability reversal , development effect of Chang 8 reservoir may be improved .

结论采用菱形反九点井网实施超前注水开发，并在注入水中添加黏土稳定剂和润湿性反转剂可以改善长8油藏的开发效果。

Under the same well space and production conditions , the water breakthrough time of five-spot pattern is longer than that of seven-spot and nine-spot pattern .

相同的井距和生产条件下，五点法井网的见水时间要长于九点法和七点法井网；

Numerical simulation of integrated fracturing project are completed by using three-dimension black oil model , production performance are predicted with favorable and unfavorable situation at inverted nine-spot and five-spot well pattern .

以三维黑油模型为基础，进行整体压裂方案数值模拟，给出了不同井网模式下裂缝有利和不利状态的生产动态预测曲线。

The recommended scheme was inter-well infill , inverted nine-spot gas injection ; gas injection pressure being above 30MPa ; the flowing pressure in oil well being controlled at about 23 MPa ; synchronous and continuous gas injection .

推荐方案为：井网加密方式采用井间加密，反九点法同步连续注气；注气压力为30MPa以上；采油井流压控制在23MPa左右。

With the increase of angle between the horizontal well and the horizontal direction , the water breakthrough time shortens in five-spot well pattern , firstly increases and then decreases in seven-spot pattern , and increases in nine-spot pattern .

随水平井与水平方向夹角的增大，五点法井网的见水时间缩短，七点法井网的见水时间先增加后缩短，九点法井网的见水时间增加；

We have analyzed the method of identifying rational well spacing density . On the foundation of economic analysis , we have compared and evaluated three kinds of methods ( rectangular , square reverse nine-spot and rhombus reverse nine-spot ) about pattern arrangement and pattern modification .

分析了合理井网密度的确定方法，以经济分析为基础对比评价了矩形、正方形反九点、菱形反九点等三种井网部署和井网调整方法。