大港油田卤水压井液结垢问题治理研究
Study on Treatment of Scaling in Brine Kill Fluid in Dagang Oilfield
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- 引用格式:
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尤秋彦,宋晓莉,薛子钰,廖兴松,樊松林.大港油田卤水压井液结垢问题治理研究[J].天然气与石油,2020,38(5):77-82.doi:10.3969/j.issn.1006-5539.2020.05.013
You Qiuyan, SongXiaoli, Xue Ziyu, Liao Xingsong, Fan Songlin.Study on Treatment of Scaling in Brine Kill Fluid in Dagang Oilfield[J].Natural Gas and Oil,2020,38(5):77-82.doi:10.3969/j.issn.1006-5539.2020.05.013
- DOI:
- 10.3969/j.issn.1006-5539.2020.05.013
- 作者:
- 尤秋彦1，宋晓莉2，薛子钰3，廖兴松1，樊松林1
You Qiuyan1, SongXiaoli2, Xue Ziyu3, Liao Xingsong1, Fan Songlin1
- 作者单位:
- 1. 中国石油大港油田公司石油工程研究院油层保护中心,2. 中海油天津化工研究设计院有限公司,3. 山东大学海洋学院
1. Petroleum Engineering Research Institute of PetroChina Dagang Oilfield Company，Tianjin,300131,China 2. CNOOC Tianjin Chemical Research and Design Institute Co., Ltd., Tianjin, 300131, China 3. Shandong University, Weihai, Shandong, 264209, China
- 关键词:
- 压井液;改性;钙卤;盐卤;阻垢剂
Killing fluid; Modified; Calcium halide; Bittern; Scale inhibitor
- 摘要:
- 为解决盐卤水结垢问题，采用三种阻垢剂WJ-1、TJ-302、TS-6对中高密度的盐卤及钙卤进行改性研究,制备出配方并应用于大港油田地区地层水及回注水进行阻垢性能的评价。试验结果表明:两种改性配方钙卤+1%～3%WJ-1+0.2%十二烷基硫酸钠和盐卤+1%～3%WJ-1+1%～3%TS-6+0.2%十二烷基硫酸钠,能使 7 000 mg/L NaHCO3和500 mg/L Na2SO4地层水在90 ℃不结垢,钙保留率达到90.0%以上,地层渗透率恢复率达到89%。因此配方适用于高碱高盐的地层,可以解决大港油田卤水压井作业结垢堵塞地层的问题,同时对其他类似地层的油田也有一定指导意义。
Three kinds of scale inhibitors WJ-1, TJ-302 and TS-6 were used to modify the medium and high density brine and calcium brine.The formulation was prepared and applied to evaluate the scale inhibition performance of formation water and reinjection water in Dagang Oilfield.The test results show that the two modified formulas of calcium halide+1%～3% WJ-1 + 0.2% sodium dodecyl sulfate and salt brine+1%～3% WJ-1+1%～3% TS-6 + 0.2% sodium dodecyl sulfate can make the formation water of 7000 mg / L NaHCO3and 500 mg / L Na2SO4free from scaling at 90℃, the calcium retention rate reaches 90.0%,and the recovery rate of formation permeability 89%.Therefore, the formula is suitable for the formation with high alkali and high salinity, which can solve the problem of scaling and plugging formation in brine well killing operation in Dagang Oilfield,and has certain guiding significance for other formations of the same nature.
