Corrosion behavior analysis of sucker rod for coalbed methane wells in the eastern block of Ordos basin

Authors

PANG Bin, Petrochina Coalbed Methane Company Limited, Beijing 100028, China; College of Mechanical and Electronic Engineering in China University of Petroleum(Huadong), Qingdao 266580, China
WANG Hanxiang, College of Mechanical and Electronic Engineering in China University of Petroleum(Huadong), Qingdao 266580, China
LAN Wenjian, College of Mechanical and Electronic Engineering in China University of Petroleum(Huadong), Qingdao 266580, China

Abstract

In order to make clear the corrosion rule of sucker rod for coalbed methane wells in the eastern block of Ordos basin, the paper summarizes the corrosion types and corrosion intensities of the sucker rod, based on the test of produced gas, produced water, corrosion products and weight loss of sucker rod. The paper analyzes the effect of different drainage stages, coal seam and mineralization degree of water on the corrosion. The results of the research indicate that corrosion is mainly caused by CO₂ and H₂S originated from No.5 coal seam and No.11 coal seam. The corrosion intensity is low in the early stage of dewatering, and it is caused by amount of dissolved CO₂ gas. In the stage of co-production of water and gas, and in the stage of single phase gas production, the corrosion results from the synergistic reaction of CO₂ and H₂S and the intensity is enhanced, while the mineralization degree of water has an positive effect. Because of the complex corrosion influence factors and the constant change of strength, it is a simple and effective anticorrosive method to coat or use anticorrosive coating on the surface of sucker rod.

Keywords

coalbed methane, sucker rod, corrosion, drainage stage, coal seam, the eastern block of Ordos basin

DOI

10.3969/j.issn.1001-1986.2019.04.013

Recommended Citation

PANG Bin, WANG Hanxiang, LAN Wenjian, et al. (2019) "Corrosion behavior analysis of sucker rod for coalbed methane wells in the eastern block of Ordos basin," Coal Geology & Exploration: Vol. 47: Iss. 4, Article 14.
DOI: 10.3969/j.issn.1001-1986.2019.04.013
Available at: https://cge.researchcommons.org/journal/vol47/iss4/14

Reference

[1] 赵金,张遂安,涂乙. 煤层气排采过程油管腐蚀机理浅谈[J]. 中国煤层气,2012,9(4):38-41. ZHAO Jin,ZHANG Sui'an,TU Yi. On mechanism of corrosion of oil pipe in CBM dewatering and drainage process[J]. China Coalbed Methane,2012,9(4):38-41.

[2] 白强,庞斌,林伟,等. HL型抽油杆断裂失效分析[J]. 金属热处理,2016,41(7):187-191. BAI Qiang,PANG Bin,LIN Wei,et al. Fracture failure analysis of grade HL sucker rod[J]. Heat Treatment of Metals,2016,41(7):187-191.

[3] 李德君,王伟,庞斌,等. 煤层气井用抽油杆腐蚀疲劳寿命的影响因素[J]. 材料热处理学报,2017,38(3):121-127. LI Dejun,WANG Wei,PANG Bin,et al. Influence factors on corrosion fatigue life of sucker rods[J]. Transactions of Materials and Heat Treatment,2017,38(3):121-127.

[4] 张国安,路民旭,吴荫顺. CO₂腐蚀产物膜的微观形貌和结构特征[J]. 材料研究学报,2005,19(5):537-548. ZHANG Guo'an,LU Minxu,WU Yinshun. Morphology and microstructure of CO₂ corrosion scales[J]. Chinese Journal of Materials Research,2005,19(5):537-548.

[5] 赵红梅,孙成科,刘鲲,等. 气相中Fe²⁺和H₂O₂作用生成OH自由基的理论研究[J]. 化学学报,2003,61(12):1934-1938. ZHAO Hongmei,SUN Chengke,LIU Kun,et al. Theoretical study on radical generation from the reaction of Fe²⁺ and H₂O₂ in gas phase[J]. Acta Chimica Sinica,2003,61(12):1934-1938.

[6] 谭才渊,殷启帅,杨进,等. 渤海某油田L80油管腐蚀机理研究[J]. 表面技术,2017,46(3):236-245. TAN Caiyuan,YIN Qishuai,YANG Jin,et al. Corrosion mechanism of L80 tubing in a Bohai oilfield[J]. Surface Technology,2017,46(3):236-245.

[7] 杜清珍,谢刚,杨梅红,等. 华北油田油井腐蚀原因分析[J]. 西南石油大学学报(自然科学版),2013,35(3):142-148. DU Qingzhen,XIE Gang,YANG Meihong,et al. Analysis of well pipe string corrosion factors in Huabei oilfield[J]. Journal of Southwest Petroleum University(Science & Technology Edition),2013,35(3):142-148.

[8] 张宏录,谢先平,马秀敏,等. 延川南煤层气田排采井杆管防腐工艺[J]. 石油钻采工艺,2015,37(3):110-113. ZHANG Honglu,XIE Xianping,MA Xiumin,et al. Corrosion resistance technology for rod and tube in drainage wells in south Yanchuan coalbed methane field[J]. Oil Drilling & Production Technology,2015,37(3):110-113.

[9] 田冲,汤达祯,周志军,等. 彬长矿区水文地质特征及其对煤层气的控制作用[J]. 煤田地质与勘探,2012,40(1):43-46. TIAN Chong,TANG Dazhen,ZHOU Zhijun,et al. Hydrogeological characteristics and their control on coalbed methane in Binchang mining area[J]. Coal Geology & Exploration,2012,40(1):43-46.

[10] 伊向艺,吴红军,卢渊,等. 不同矿化度水对煤层气解吸-扩散影响的实验[J]. 煤田地质与勘探,2013,41(5):33-35. YI Xiangyi,WU Hongjun,LU Yuan,et al. Experimental study on the effect of salinity on coalbed methane desorption-diffusion[J]. Coal Geology & Exploration,2013,41(5):33-35.

[11] 魏迎春,张强,王安民,等. 准噶尔盆地南缘煤系水矿化度对低煤阶煤层气的影响[J]. 煤田地质与勘探,2016,44(1):31-37. WEI Yingchun,ZHANG Qiang,WANG Anmin,et al. The influence of the salinity of groundwater in coal measures on low rank coalbed methane in the south margin of Junggar basin[J]. Coal Geology & Exploration,2016,44(1):31-37.

[12] 程相榜,张自强,孟贺超. Cl^-和SO₄^2-对矿井高含水液压液腐蚀行为的影响[J]. 煤炭科学技术,2017,45(4):98-101. CHENG Xiangbang,ZHANG Ziqiang,MENG Hechao. Study on Cl-and SO₄^2- affected to corrosion behavior of mine high water content hydraulic fluid[J]. Coal Science and Technology,2017,45(4):98-101.

[13] 车影. 沁水盆地煤层气井产出水的检测与分析[J]. 煤炭与化工,2016,39(8):154-157. CHE Ying. Analysis and detection of water produced from CBM wells of Qinshui basin[J]. Coal and Chemical Industry,2016,39(8):154-157.

[14] 张婧,何绪文,张春晖. 柳林煤层气排水水质特性及处理对策[J]. 煤矿安全,2014,45(3):186-188. ZHANG Jing,HE Xuwen,ZHANG Chunhui. Water characteristics and treatment methods of Liulin coalbed methane drainage[J]. Safety in Coal Mines,2014,45(3):186-188.

[15] 庄文,初立业,邵宏波. 油田硫酸盐还原菌酸化腐蚀机制及防治研究进展[J]. 生态学报,2011,31(1):575-582. ZHUANG Wen,CHU Liye,SHAO Hongbo. Acid corrosion mechanism of the sulfate-reducing bacteria and protecting studies in oilfield[J]. Acta Ecologica Sinica,2011,31(1):575-582.

[16] 朱卫平,唐书恒,王晓峰,等. 煤层气井产出水中氯离子变化规律回归分析模型[J]. 煤田地质与勘探,2012,40(5):34-36. ZHU Weiping,TANG Shuheng,WANG Xiaofeng,et al. Prediction model for the ion concentration change of co-produced water from coalbed methane wells[J]. Coal Geology & Exploration,2012,40(5):34-36.