海上水平井蒸汽吞吐焖井阶段温度与压力剖面测试实例

An Example of Testing Temperature and Pressure Profile in Offshore Horizontal Well During Steeping Stage of Steam Huff and Puff

为了评价海上水平井的稠油蒸汽吞吐开采效果和油藏动用状况,在焖井阶段用氮气压井,将蒸汽向下挤至500~800m位置,用Φ1.25″连续油管拖动耐温400℃仪器(放置在托筒内)测试了300m长度水平段的温度、压力剖面.整个施工过程中,井口最高温度为28℃.氮气压井技术保证了井下高温、高压条件下的施工过程安全.

In order to evaluate the recovery effect of heavy oil steam huff and puff and reservoir production of CNOOC offshore horizontal well,the steam was pushed downward to the 500~800 mposition during the steeping stage by nitrogen.A kind of coiled tubing(Φ1.25″)was used to test the temperature and pressure profile of the 300 mhorizontal section by dragging a 400℃temperature resistance instrument(placed in the tray).The highest temperature of the wellhead was 28 ℃ during construction process.The nitrogen killing technology ensures the safety of the testing process under the conditions of higher temperature and pressure.