提高注水开发效果的稠化原油技术研究

开发了一种稠化原油技术以提高油田注水开发效果，确定了稠化原油体系最佳配方：原油选择辽河油田欢2联外输原油（粘度306．2mPa·s），乳化剂选用自制表面活性剂XYJ，加量为1．O％-3．0％。性能评价表明，该体系吸水增粘能力强，适用温度为40-100℃；并且选择性封堵效果好，堵水率大于90％，堵油率小于15％，平均提高油层中、低渗透层总采收率25．34％。该技术在辽河油田实施3井次，增油降水效果较好，均达到预期目标。该技术具有施工工艺简单、不伤害油层、环保、低成本、原料易得等特点，且采出液不需特殊处理，具有广阔的应用前景。

Research on Thickened Crude Oil Technology Improving Injection Efficiency

A thicken crude oil W/O emulation technology was developed to improve injection efficiency in the water - injection development reservoirs. The optimum formula of the thickened crude oil system was determined as follows：the crude oil（viscosity 306.2 mPa· s） from Huan 2 Station of Liaohe Oilfield and a self- made surfactant XYJ （1.0 - 3.0%） as emulsifier. The results of property evaluation showed that the system had strong absorbent and tackifying effects and worked well in the range of 40 ℃ to 100 ℃. It＇ s water - plugging rate was more than 90% and oil- plugging rate was less than 15%. The total recovery rates of middle or lower stratum were averagely increased 25.34 % by using the system. The good results were also got in three field applications. The produced liquid needed no special disposal.