油气藏评价与开发 ›› 2022, Vol. 12 ›› Issue (2): 329-336.doi: 10.13809/j.cnki.cn32-1825/te.2022.02.008
收稿日期:
2021-09-28
出版日期:
2022-04-26
发布日期:
2022-05-07
作者简介:
杨兵(1995—),男,硕士,助理工程师,从事排水采气工艺研究及现场应用工作。地址:内蒙古自治区鄂尔多斯市乌审旗图克镇中国石化华北油气分公司采气一厂采气管理一区,邮政编码:017318。E-mail: YANG Bing1(),ZHANG Tailai1,LI Jia2,ZHAO Jianjun1,WANG Chengfeng1
Received:
2021-09-28
Online:
2022-04-26
Published:
2022-05-07
摘要:
大牛地气田下古气藏地层水矿化度高、呈偏酸性,多采用井下节流工艺,导致气田广泛使用的两性泡排剂起泡、稳泡性能差,无法满足高效、低成本排水采气的需求。国内外虽已形成几十种泡排剂,但针对大牛地气田下古气藏特性研制的泡排剂未见报道。针对下古气藏流体和工艺特点,考虑高矿化度地层水的影响、对pH的敏感度及泡沫通过节流器时的稳定性等因素,构建一种以磺化AEO3(椰油醇聚氧乙烯(3)醚)与月桂酰胺丙基磷酸甜菜碱为主剂、椰子油脂肪酸单乙醇酰胺为助泡剂、油患子精华素为稳泡剂的新型两性非离子复合型泡排剂。室内评价表明,两性非离子复合型泡排剂在高矿化度、酸性环境下具有较强的起泡、稳泡、二次起泡和携液能力;现场试验应用后,气井排液能力提升、油套压差降低、产气量增加,应用效果和经济效益前景良好。两性非离子复合型泡排剂填补了大牛地气田下古气藏泡排剂的空缺,可改善下古气藏气井携液不足的技术难题,具有推广应用价值。
中图分类号:
杨兵,张泰来,李佳,赵建军,王成锋. 新型两性非离子型泡排剂在下古气藏的试验与应用[J]. 油气藏评价与开发, 2022, 12(2): 329-336.
YANG Bing,ZHANG Tailai,LI Jia,ZHAO Jianjun,WANG Chengfeng. Test and application of new amphoteric-nonionic foaming agents in Lower Palaeozoic gas reservoir[J]. Reservoir Evaluation and Development, 2022, 12(2): 329-336.
表1
大牛地气田地层水性质及工艺差异"
气藏 | 地层水性质 | 节流 工艺 | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
K++Na+ (mg/L) | Ca2+ (mg/L) | Mg2+ (mg/L) | SO42- (mg/L) | HCO3- (mg/L) | Cl- (mg/L) | 矿化度 (g/L) | pH | 水型 | ||
上古 | 4 147~14 435 | 1 236~13 721 | 66~1 028 | 0~291 | 223~1 023 | 7 621~52 678 | 14~79 | 6.0~6.2 | CaCl2 | 站内节流 |
下古 | 10 752~16 652 | 40 409~59 088 | 7 447~8 999 | 2 266~2 675 | 590~876 | 88 147~155 201 | 150~260 | 4.8~5.4 | CaCl2 | 井下节流 |
表5
A井试验前后生产数据"
对比 项目 | 试验前 | 试验稳定期间 | 试验后 | ||
---|---|---|---|---|---|
5月11日—5月17日 | 5月28日—6月14日 | 6月15日—6月21日 | |||
泡排剂 | 两性泡排剂 | 新型泡排剂 | 两性泡排剂 | ||
加注周期 | 每天一次 | 每天一次 | 每天一次 | ||
加注量(L) | 5 | 5 | 5 | ||
药水比例 | 1∶10 | 1∶10 | 1∶10 | ||
产气量 (m3/d) | 532~3 286 2 109 | 2 509~3 937 3 196 | 2 793~3 408 3 017 | ||
产液量 (m3/d) | 0.21~0.68 0.43 | 0.57~1.85 0.94 | 0.33~0.66 0.44 | ||
油压 (MPa) | 1.00~1.80 1.43 | 1.03~2.347 1.38 | 1.20~1.90 1.63 | ||
套压 (MPa) | 5.60~6.10 5.80 | 5.50~5.80 5.63 | 5.72~5.90 5.86 | ||
油套压差 (MPa) | 3.80~5.06 4.37 | 3.03~4.55 4.25 | 4.00~4.70 4.23 |
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