Gas storage is an important means to reserve natural gas strategic resources and allocate natural gas production, which has good social and economic benefits. There are some problems in the drilling operation of gas storage, such as wellbore cleaning, wellbore instability, downhole leakage, etc. In view of such problems, the existing drilling fluid technology is optimized to effectively reduce the downhole complex and form a set of large wellbore drilling fluid technology for gas storage wells. After using this technology, the yield point of drilling fluid is over 0.3 Pa, which meets the needs of borehole cleaning. The finished drilling density is below 1.20 g/cm3, and the filtration loss is less than 6 mL, which ensures the borehole stability. The formation bearing capacity can be increased to the equivalent density of above 1.36 g/cm3 after using the supramolecular gel as sealing agent, the proportion of the lost time dealing with the complexity decreased from 10% to 5.26%, which meets the needs of gas storage construction.
[1] 马新华,郑得文,魏国齐,等.中国天然气地下储气库重大科学理论技术发展方向[J].天然气工业,2022,42(5):93-99.MA Xinhua, ZHENG Dewen, WEI Guoqi, et al. Development directions of major scientific theories and technologies for underground gas storage[J]. Natural Gas Industry, 2022,42(5):93-99.
[2] 李建君.中国地下储气库发展现状及展望[J].油气储运,2022,41(7):1-7.LI Jianjun. Development status and prospect of underground gas storage in China[J]. Oil & Gas Storage and Transportation, 2022,41(7):1-7.
[3] 张福强,曾平,周立坚,等.国内外地下储气库研究现状与应用展望[J].中国煤炭地质,2021,33(10):39-42,52.ZHANG Fuqiang, ZENG Ping, ZHOU Lijian, et al. Underground gas storage research status and application expectations at home and abroad[J]. Coal Geology of China, 2021,33(10):39-42,52.
[4] 周学深. 有效的天然气调峰储气技术——地下储气库[J]. 天然气工业, 2013, 33(10): 95-99.ZHOU Xueshen. An effective means of natural gas peak-shaving and storage technologies:Underground gas storage[J]. Natural Gas Industry, 2013, 33(10): 95-99.
[5] 吴忠鹤,贺宇.地下储气库的功能和作用[J].天然气与石油,2004,22(2):1-4.WU Zhonghe, HE Yu. Function and effect of underground natural gas storage[J]. Natural Gas and Oil, 2004,22(2):1-4.
[6] 新华社.中国石油长庆油田公司年产油气当量再上6000万吨[J].天然气工业,2021,41(12):137.Xinhua News Agency. The annual oil and gas equivalent of PetroChina Changqing Oilfield Company has reached 60 million tons again[J]. Natural Gas Industry, 2021,41(12):137.
[7] Wang G, Dong M, Wang Z, et al. Removing cuttings from inclined and horizontal wells: Numerical analysis of the required drilling fluid rheology and flow rate[J]. Journal of Natural Gas Science and Engineering, 2022,102:104544.
[8] 孙晓峰,闫铁,王克林,等.复杂结构井井眼清洁技术研究进展[J].断块油气田,2013,20(1):1-5.SUN Xiaofeng, YAN Tie, WANG Kelin, et al. Research progress of hole cleaning in complex structure well[J]. Fault-Block Oil & GasField, 2013,20(1):1-5.
[9] Mahmoud H, Hamza A, Nasser M S, et al. Hole cleaning and drilling fluid sweeps in horizontal and deviated wells: Comprehensive review[J]. Journal of Petroleum Science and Engineering, 2020,186:106748.
[10] 鄢捷年.钻井液工艺学[M].北京:中国石油大学出版社,2006:81.YAN Jienian. Drilling Fluid Technology[M]. Beijing: China University of Petroleum Press, 2006:81.
[11] 张洪泉,任中启,董明健.大斜度大位移井岩屑床的解决方法[J].石油钻探技术,1999(3):6-8.ZHANG Hongquan, REN Zhongjian, DONG Mingjian. Methods to solve cuttings bed in high-inclination, long-reached well[J]. Petroleum Drilling Techniques, 1999(3):6-8.
[12] 王建龙,张长清,郭云鹏,等.大斜度井井眼清洁影响因素及对策研究[J].钻采工艺,2020,43(6):28-30,7.WANG Jianlong, ZHANG Changqing, GUO Yunpeng, et al. Influencing factors and countermeasures of well cleaning in high-angle wells[J]. Drilling & Production Technology, 2020,43(6):28-30,7.
[13] 刘胜.大位移井井眼清洁技术在PH-ZG1井的应用[J].长江大学学报(自科版),2018,15(7):58-61.LIU Sheng. The application of hole cleaning technology of extended reach wells in well PH-ZG1[J]. Journal of Yangtze University (Natural Science Edition), 2018,15(7):58-61.
[14] 董平华,董昆,霍宏博,等.渤海油田大井眼深钻综合钻井液维护技术[J].石油钻采工艺,2018,40(S1):139-142.DONG Pinghua, DONG Kun, HUO Hongbo, et al. A comprehensive drilling fluid maintenance technology used for large-hole deep drilling in the Bohai Oilfield[J]. Oil Drilling & Production Technology, 2018,40(S1):139-142.
[15] 李振川,姚昌顺,胡开利,等.水平井井眼清洁技术研究与实践[J].新疆石油天然气,2022,18(1):48-53.LI Zhenchuan, YAO Changshun, HU Kaili, et al. Research and practice of horizontal wellbore cleaning technology[J]. Xinjiang Oil & Gas, 2022,18(1):48-53.
[16] 吕开河,孙明波,邱正松.塔里木盆地依奇克里克区块煤层钻井技术研究[J].石油学报,2006,27(5):108-111.LV Kaihe, SUN Mingbo, QIU Zhengsong. Drilling techniques for coalbed in Yiqikelike area of Tarim Basin[J]. Acta Petrolei Sinica, 2006,27(5):108-111.
[17] 高向东,王延斌,张崇崇.钻井中煤体结构特征与井壁稳定性分析研究[J].煤炭科学技术,2016,44(5):95-99.GAO Xiangdong, WANG Yanbin, ZHANG Chongchong. Study and analysis on coal structure features and well wall stability during drilling operation[J]. Coal Science and Technology, 2016,44(5):95-99.
[19] 郝海洋,李勇,宋继伟,等.黔西南地区煤系地层井壁稳定技术探讨[J].探矿工程(岩土钻掘工程),2019,46(7):8-13,33.HAO Haiyang, LI Yong, SONG Jiwei, et al. Wellbore stabilization techniques in coal-bearing formation in Southwestern Guizhou[J]. Exploration Engineering (Rock & Soil Drilling Engineering), 2019,46(7):8-13,33.
[20] 王勇,蒋官澄,杜庆福,等.超分子化学堵漏技术研究与应用[J].钻井液与完井液,2018,35(3):48-53.WANG Yong, JIANG Guancheng, DU Qingfu, et al. Study and application of supramolecule chemical LCM technology[J]. Drilling Fluid & Completion Fluid, 2018,35(3):48-53.