疏松砂岩油藏二次开发方式研究与实践

Research and practice of redevelopment methods for unconsolidated sandstone reservoirs

曙三区是曙光油田主力区块之一,出砂严重,实际注采井网极不完善,油藏开发效果较差。针对这一问题,选择出砂最为严重的区块实施二次开发先导试验。通过重新规划注采井网,开展系列防砂工艺,2个先导试验井组的油层钻遇率及投产效果均达到预期目的,防砂、治砂取得初步成果。该研究为疏松砂岩油藏的二次开发提供了可借鉴的经验。

As one of the principle producing blocks in Shuguang oilfield,Block Shu3 has serious sanding problem,incomplete flooding pattern and poor development response.Therefore,a unit with the most serious sanding problem has been selected to carry out a pilot test of redevelopment.The pilot test was conducted in 2 well groups by rearranging flooding pattern and implementing a series of sand control technologies,both of the reservoir encountering rate and production effect have achieved the expectation,and preliminary success has been achieved in sand control and sand treatment.The study results have provided helpful knowledge for redevelopment of unconsolidated sandstone reservoirs.