顺北油田碳酸盐岩酸蚀裂缝导流能力实验研究
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Engineering, Northwest Oilfield Company, SINOPEC, Urumqi 830001, China)
Abstract： The development of carbonate reservoirs in Shunbei Oilfield is based on acid fracturing. For the characteristics of high temperature and high pressure pure limestone reservoirs in this area, the FCES-100 flow director was used to test the acid-etched conductivity in the laboratory. The rock samples were selected from a group of reservoir limestones in the area. The experiment shows that under the same condition of acid rock contact time, the acid-etched conductivity is greater than that of cross-linked acid; the optimum acid-rock contact time for turning acid is 40 min; the turning pressure of turning acid and cross-linked acid is 40 MPa and 46 MPa, respectively. When the pressure is lower than the turning closure pressure, the conductivity of the acid-etched fracture is greater than that of the sanding acid-etched fracture. When the pressure is higher than the turning closing pressure, the conductivity of the acid-etched fracture is smaller than that of the sanding acid-etched fracture; the long-term conductivity of acid and cross-linked acid decrease rapidly within 48 h and 72 h, respectively, and become stable after 96 h and 120 h, respectively. Studies show that in the acid pressure design, it is necessary to optimize the injection method and the amount of acid to improve the acid-etched effect. Key words： carbonate reservoir; acid-etched fracture conductivity; acid-etched fracture with proppant; long-term conductivity
断
块
油
气
田
第26卷第4期
FAULT-BLOCK OIL & GAS FIELD
2019年7月
顺北油田碳酸盐岩酸蚀裂缝导流能力实验研究 doi: 10.6056/dkyqt201904026
曲占庆？,林强？，郭天魁？，王洋2
）1.中国石油大学（华东）石油工程学院，山东青岛266580；2•中Hale Waihona Puke Baidu石化西北油田分公司石油工程技术研究院，新疆乌鲁木齐830001）
0引言
在塔里木盆地顺北油田的开发过程中，酸化压裂 改造工艺技术已经成为碳酸盐岩油藏增产和稳产的主 导技术"T。酸蚀裂缝导流能力的增加，对该地区的增 产效果影响显著"4$。对于碳酸盐岩的酸蚀裂缝导流能 力，很多学者都只对酸液类型、酸液用量及注酸排量进 行了研究"5#7$ '而对于考虑顺北油田实际地层条件下， 室内酸蚀裂缝导流能力实验的研究太少，不足以指导
基金项目：国家自然科学基金项目“热储层水力压裂低温诱导热应力致裂机理研究”（51874338）
摘 要 顺北油田碳酸盐岩油藏的开发以酸化压裂为主！针对该油田高温、高压、纯石灰岩储层的特性，利用FCES-100导
流仪开展室内酸蚀裂缝导流能力的测试！岩样选用该油田一间房组储层石灰岩！实验结果表明：在酸岩接触时间相同的条
关键词 碳酸盐岩储层；酸蚀裂缝导流能力；酸蚀加砂裂缝；长期导流能力
中图分类号:TE357
文献标志码:A
Experimental study on acid fracture conductivity of carbonate rock in Shunbei Oilfield
QU Zhanqing1, LIN Qiang1, GUO Tiankui1, WANG Yang2 (l.School of Petroleum Engineering, China University of Petroleum, Qingdao 266580, China; 2.Research Institute of Petroleum
件下，转向酸的酸蚀裂缝导流能力大于交联酸；转向酸的最佳酸岩接触时间为40 min；转向酸和交联酸的转折闭合压力分 别为40 MPa和46 MPa,闭合压力低于转折闭合压力时#酸蚀裂缝的导流能力大于加砂酸蚀裂缝#闭合压力高于转折闭合 压力时，酸蚀裂缝的导流能力小于加砂酸蚀裂缝；转向酸和交联酸的长期导流能力分别在48h和72h以内迅速下降，并分 别于96h和120h以后趋于稳定！研究表明，在顺北油田酸化压裂设计中需优化注入方式和酸液用量，以提高酸蚀效果！
Abstract： The development of carbonate reservoirs in Shunbei Oilfield is based on acid fracturing. For the characteristics of high temperature and high pressure pure limestone reservoirs in this area, the FCES-100 flow director was used to test the acid-etched conductivity in the laboratory. The rock samples were selected from a group of reservoir limestones in the area. The experiment shows that under the same condition of acid rock contact time, the acid-etched conductivity is greater than that of cross-linked acid; the optimum acid-rock contact time for turning acid is 40 min; the turning pressure of turning acid and cross-linked acid is 40 MPa and 46 MPa, respectively. When the pressure is lower than the turning closure pressure, the conductivity of the acid-etched fracture is greater than that of the sanding acid-etched fracture. When the pressure is higher than the turning closing pressure, the conductivity of the acid-etched fracture is smaller than that of the sanding acid-etched fracture; the long-term conductivity of acid and cross-linked acid decrease rapidly within 48 h and 72 h, respectively, and become stable after 96 h and 120 h, respectively. Studies show that in the acid pressure design, it is necessary to optimize the injection method and the amount of acid to improve the acid-etched effect. Key words： carbonate reservoir; acid-etched fracture conductivity; acid-etched fracture with proppant; long-term conductivity
断
块
油
气
田
第26卷第4期
FAULT-BLOCK OIL & GAS FIELD
2019年7月
顺北油田碳酸盐岩酸蚀裂缝导流能力实验研究 doi: 10.6056/dkyqt201904026
曲占庆？,林强？，郭天魁？，王洋2
）1.中国石油大学（华东）石油工程学院，山东青岛266580；2•中Hale Waihona Puke Baidu石化西北油田分公司石油工程技术研究院，新疆乌鲁木齐830001）
0引言
在塔里木盆地顺北油田的开发过程中，酸化压裂 改造工艺技术已经成为碳酸盐岩油藏增产和稳产的主 导技术"T。酸蚀裂缝导流能力的增加，对该地区的增 产效果影响显著"4$。对于碳酸盐岩的酸蚀裂缝导流能 力，很多学者都只对酸液类型、酸液用量及注酸排量进 行了研究"5#7$ '而对于考虑顺北油田实际地层条件下， 室内酸蚀裂缝导流能力实验的研究太少，不足以指导
基金项目：国家自然科学基金项目“热储层水力压裂低温诱导热应力致裂机理研究”（51874338）
摘 要 顺北油田碳酸盐岩油藏的开发以酸化压裂为主！针对该油田高温、高压、纯石灰岩储层的特性，利用FCES-100导
流仪开展室内酸蚀裂缝导流能力的测试！岩样选用该油田一间房组储层石灰岩！实验结果表明：在酸岩接触时间相同的条
关键词 碳酸盐岩储层；酸蚀裂缝导流能力；酸蚀加砂裂缝；长期导流能力
中图分类号:TE357
文献标志码:A
Experimental study on acid fracture conductivity of carbonate rock in Shunbei Oilfield
QU Zhanqing1, LIN Qiang1, GUO Tiankui1, WANG Yang2 (l.School of Petroleum Engineering, China University of Petroleum, Qingdao 266580, China; 2.Research Institute of Petroleum
件下，转向酸的酸蚀裂缝导流能力大于交联酸；转向酸的最佳酸岩接触时间为40 min；转向酸和交联酸的转折闭合压力分 别为40 MPa和46 MPa,闭合压力低于转折闭合压力时#酸蚀裂缝的导流能力大于加砂酸蚀裂缝#闭合压力高于转折闭合 压力时，酸蚀裂缝的导流能力小于加砂酸蚀裂缝；转向酸和交联酸的长期导流能力分别在48h和72h以内迅速下降，并分 别于96h和120h以后趋于稳定！研究表明，在顺北油田酸化压裂设计中需优化注入方式和酸液用量，以提高酸蚀效果！