渤海两油田油井堵塞原因分析及化学解堵试验

简要介绍了埕北油田和绥中36-1油田的储层特点及钻完井方式和原油特性,对两油田油井的堵塞原因进行了分析,并对油井解堵施工工艺技术进行研究。在此基础上研制出针对有机垢的解堵剂YS-01进行现场试验,试验结果表明:化学解堵剂YS-01可以很好地解除埕北油田和绥中36-1油田油井近井地带的有机垢堵塞,增产效果十分明显;9口解堵井平均有效期已超过200天,经济效益十分显著。其成果对与埕北油田和绥中36-1油田相类似油田的油井管理、堵塞原因分析、施工工艺技术研究、解堵剂研制、解堵选井及化学解堵施工具有参考价值。

DIAGNOSIS OF REASONS FOR OIL WELL PLUGGING AND CHEMICAL REMEDIAL TREATMENT TESTS AT TWO OILFIELDS IN BOHAI BAY

The characteristics of reservoirs and crude oil, way of drilling and completion at Chenbei and Suizhong 36-1 oilfield have been briefly introduced in this paper. After analyzing the causes of oil well plugging, the in-situ remedial operation tech-niques have been studied. A chemical agent called YS-01 a-gainst organic scales has been developed and used field test. Re-sults show that the plug remover YS-01 is very effective in elim-inating organic scale damage existed in the near well region, and has remarkable production stimulation. The average life span of nine wells after remedial treatment has exceeded 200 days andacquired great economic benefits. The successful application will be very nutritious to well surveillance, plugging causes analysis, well operation technology, development of plug remover, well selection for plugging removal and remedial treatment in similar oilfields of Bohai bay.