YAO Hongsheng，FANG Dazhi，BAO Kai，et al. Geological evaluation and effective fracturing technology of Longtan Formation CBM in Nanchuan Block, Southeast Chongqing, China[J]. Coal Science and Technology，2023，51（S2）：132−140
. DOI: 10.13199/j.cnki.cst.2022-2248| Citation: |
YAO Hongsheng，FANG Dazhi，BAO Kai，et al. Geological evaluation and effective fracturing technology of Longtan Formation CBM in Nanchuan Block, Southeast Chongqing, China[J]. Coal Science and Technology，2023，51（S2）：132−140 . DOI: 10.13199/j.cnki.cst.2022-2248
|
The development of China’s coalbed methane (CBM) industry is unbalanced between the south and the north. As an important replacement resource in unconventional fields in southeast Chongqing, The beneficial exploitation of Longtan coalbed methane is restricted by the selection of existing geological sweet spots and reservoir fracturing reconstruction technology. Therefore, the Nanchuan block in southeast Chongqing is selected as the research object. Based on seismic, drilling, logging, analysis and testing data, the geological conditions of Longtan coalbed methane Formation are analyzed, the geological sweet spot area is optimized, and the targeted fracturing technology is proposed and applied to the field practice. The results show that: ① The coal-bearing strata in this area are characterized by multiple coal layers, large cumulative thickness and good gas bearing capacity. However, the basic reasons for the failure of coalbed methane breakthrough in this area are the strong heterogeneity of each coal seam and large horizontal stress difference coefficient, leaving conventional fracturing inadequate to form effective propping fractures over long distances. ② A geological sweet spot evaluation system of CBM enrichment and high-yield has been formed with three core elements of “material basis, preservation conditions and fracability”. The C25 coal seam was selected as the longitudinal sweet spot segment. The middle and deep sweet spot area of 500-
| [1] |
庚 勐,陈 浩,陈艳鹏,等. 第4轮全国煤层气资源评价方法及结果[J]. 煤炭科学技术,2018,46(6):64−68.
GENG Meng,CHEN Hao,CHEN Yanpeng,et al. Methods and results of the fourth round national CBM resources evaluation[J]. Coal Science and Technology,2018,46(6):64−68.
|
| [2] |
姚红生,陈贞龙,何希鹏 ,等 . 深部煤层气“有效支撑”理念及创新实践——以鄂尔多斯盆地延川南煤层气田为例 [J]. 天然气工业 ,2022,42(6):97−106.
YAO Hongsheng,CHEN Zhenlong,HE Xipeng,et al. “Effective support” concept and innovative practice of deep CBM in South Yanchuan Gas Field of the Ordos Basin[J]. Natural Gas Industry,2022,42(6):97−106.
|
| [3] |
朱庆忠. 沁水盆地高煤阶煤层气高效开发关键技术与实践[J]. 天然气工业,2022,42(6):87−96.
ZHU Qingzhong. Key technologies and practices for efficient development of high-rank CBM in the Qinshui Basin[J]. Natural Gas Industry,2022,42(6):87−96.
|
| [4] |
姚红生,杨 松,刘 晓,等. 低效煤层气井多次压裂增效开发技术研究[J]. 煤炭科学技术,2022,50(9):121−129.
YAO Hongsheng,YANG Song,LIU Xiao,et al. Research on efficiency-enhancing development technology of multiple fracturing in low-efficiency CBM wells[J]. Coal Science and Technology,2022,50(9):121−129.
|
| [5] |
吴建军,刘学鹏,孙晓锐,等. 煤层气井缝网改造施工参数优化及裂缝形态监测技术[J]. 煤炭科学技术,2019,47(11):176−181.
WU Jianjun,LIU Xuepeng,SUN Xiaorui,et al. Research on optimization crack monitoring technology for construction parameters of coalbed methane well seam reconstruction[J]. Coal Science and Technology,2019,47(11):176−181.
|
| [6] |
刘 忠,张继东,鲁秀芹,等. 煤岩二次暂堵压裂裂缝扩展规律试验研究[J]. 煤炭科学技术,2022,50(6):254−259.
LIU Zhong,ZHANG Jidong,LU Xiuqin,et al. Experimental study of hydraulic facture propagation behavior during temporary plugging re-fracturing in coal formation[J]. Coal Science and Technology,2022,50(6):254−259.
|
| [7] |
梁 兴,单长安,李兆丰,等. 山地煤层气勘探创新实践及有效开采关键技术——以四川盆地南部筠连煤层气田为例[J]. 天然气工业,2022,42(6):107−129.
LIANG Xing,SHAN Chang an,LI Zhaofeng,et al. Exploration innovation practice and effective exploitation key technology of mountain coalbed methane:Taking the Junlian coalbed methane field in southern Sichuan Basin as an example[J]. Natural Gas Industry,2022,42(6):107−129.
|
| [8] |
迟焕鹏,毕彩芹,胡志方,等. 黔西地区煤层气井有利层位优选与精细化排采[J]. 辽宁工程技术大学学报(自然科学版),2021,40(4):303−309.
CHI Huanpeng,BI Caiqin,HU Zhifang,et al. Optimum seams selection and fine production program for CBM wells in western Guizhou[J]. Journal of Liaoning Technical University(Natural Science),2021,40(4):303−309.
|
| [9] |
郭东鑫,汪 威,程礼军,等. 綦江打通区块綦煤1井煤储层物性垂向分布特征[J]. 煤田地质与勘探,2018,46(5):102−106.
GUO Dongxin,WANG Wei,CHENG Lijun,et al. Vertical distribution features of physical properties of coal reservoir in shaft QM-1 of Datong block of Qijiang area[J]. Coal Geology & Exploration,2018,46(5):102−106.
|
| [10] |
郭 涛,高小康,孟贵希,等. 织金区块煤层气合采生产特征及开发策略[J]. 煤田地质与勘探,2019,47(6):14−19.
GUO Tao,GAO Xiaokang,MENG Xigui,et al. Combined CBM production behavior and development strategy of multiple coal seams in Zhijin block[J]. Coal Geology & Exploration,2019,47(6):14−19.
|
| [11] |
李仕钊. 织金区块多煤层合采煤层气排采模式分析[J]. 煤炭技术,2018,37(4):71−73.
LI Shizhao. Analysis of drainage and gas recovery mode of multi-coalbed methane in Zhijin block[J]. Coal Technology,2018,37(4):71−73.
|
| [12] |
王家鹏. 云南老厂雨旺区块煤层气井产能影响因素研究[A]. 2021年煤层气学术研讨会[C]. 宜昌:地质出版社,2021.
WANG Jiapeng. Study on factors affecting the productivity of coal bed methane wells in Yuwang Block,Laochang,Yunnan[A]. 2021 Coalbed Methane Symposium,Yichang,Hubei[C]. Yichang:Geology Press,2021.
|
| [13] |
胡海洋,陈 捷,娄 毅,等. 煤层气井高产水地质与工程因素及控水措施[J]. 煤炭科学技术,2022,50(10):151−158.
HU Haiyang,CHEN Jie,LOU Yi,et al. Geological and engineering factors of high water production in coalbed methane wells and water control measures[J]. Coal Science and Technology,2022,50(10):151−158.
|
| [14] |
喻廷旭,金 涛,罗 勇,等. 川南宜宾地区煤层气资源潜力及有利区优选[J]. 煤炭科学技术,2022,50(9):130−137.
YU Tingxu,JIN Tao,LUO Yong,et al. Coalbed methane resource potential and favorable area optimization in Yibin Area,Southern Sichuan[J]. Coal Science and Technology,2022,50(9):130−137.
|
| [15] |
房大志,程泽虎,李佳欣. 渝东南地区超深层煤层气高效压裂技术及精细排采制度研究与实践——以NY1井为例[J]. 煤田地质与勘探,2022,50(5):50−56.
FANG Dazhi,CHENG Zehu,LI Jiaxin. Eefficient fracturing technology and fine drainage system of ultra-deep coalbed methane in southeast Chongqing:a case study of NY1 well[J]. Coal Geology & Exploration,2022,50(5):50−56.
|
| [16] |
杨明显,李大华,陈 飞. 重庆地区二叠系上统龙潭组/吴家坪组煤变质规律及其对煤层含气量的影响[J]. 中国煤炭地质,2011,23(11):27−30,40.
YANG Mingxian,LI Dahua,CHEN Fei. Upper permian Longtan and Wujiaping formations coal metamorphic pattern and its impact on coal seam gas content in Chongqing area[J]. Coal Geology of China,2011,23(11):27−30,40.
|
| [17] |
郭东鑫,张华莲,王 晋,等. 重庆綦江打通区块煤层气地质条件及控气因素研究[J]. 中国煤炭地质,2018,30(7):25−27,83.
GUO Dongxin,ZHANG Hualian,WANG Jin,et al. Study on CBM geological conditions and gas control factors in Datong Block,Qijiang,Chongqing[J]. Coal Geology of China,2018,30(7):25−27,83.
|
| [18] |
秦 勇,申 建,李小刚. 中国煤层气资源控制程度及可靠性分析[J]. 天然气工业,2022,42(6):19−32.
QIN Yong,SHEN Jian,LI Xiaogang. Control degree and reliability of CBM resources in China[J]. Natural Gas Industry,2022,42(6):19−32.
|
| [19] |
周德华,陈 刚,陈贞龙,等. 中国深层煤层气勘探开发进展、关键评价参数与前景展望[J]. 天然气工业,2022,42(6):43−51.
ZHOU Dehua,CHEN Gang,CHEN Zhenlong,et al. Exploration and development progress,key evaluation parameters and prospect of deep CBM in China[J]. Natural Gas Industry,2022,42(6):43−51.
|
| [20] |
赵文峰,尹中山,肖建新,等. 多煤层煤层气有利区评价方法研究与应用[J]. 中国煤层气,2018,15(4):8−13.
ZHAO Wenfeng,YIN Zhongshan,XIAO Jianxin,et al. Study and application of evaluation paraments fof CBM favorable area in multi layer coal seam[J]. China Coalbed Methane,2018,15(4):8−13.
|
| [21] |
吴财芳,刘小磊,张莎莎. 滇东黔西多煤层地区煤层气“层次递阶”地质选区指标体系构建[J]. 煤炭学报,2018,43(6):1647−1653.
WU Caifang,LIU Xiaolei,ZHANG Shasha. Construction of index system of “Hierarchical progressive” geological selection of coalbed methane in multiple seam area of eastern Yunnan and western Guizhou[J]. Journal of China Coal Society,2018,43(6):1647−1653.
|
| [22] |
李曙光,王成旺,王红娜,等. 大宁–吉县区块深层煤层气成藏特征及有利区评价[J]. 煤田地质与勘探,2022,50(9):59−67.
LI Shuguang,WANG Chengwang,WANG Hongna,et al. Reservoir forming characteristics and favorable area evaluation of deep coalbed methane in Daning-Jixian Block[J]. Coal Geology & Exploration,2022,50(9):59−67.
|
| [23] |
闫 霞,徐凤银,聂志宏,等. 深部微构造特征及其对煤层气高产“甜点区”的控制——以鄂尔多斯盆地东缘大吉地区为例[J]. 煤炭学报,2021,46(8):2426−2439.
YAN Xia,XU Fengyin,NIE Zhihong,et al. Microstructure characteristics of Daji area in east Ordos Basin and its control over the high yield dessert of CBM[J]. Journal of China Coal Society,2021,46(8):2426−2439.
|
| [24] |
杨晓盈,李永臣,朱文涛,等. 贵州煤层气高产主控因素及甜点区综合评价模型[J]. 天然气地球科学,2018,29(11):1664−1671.
YANG Xiaoying,LI Yongchen,ZHU Wentao,et al. The main controlling factors for production and the comprehensive evaluation model of dessert area of coalbed methanein Guizhou Province[J]. Natural Gas Geoscience,2018,29(11):1664−1671.
|
| [25] |
刘贻军. 鄂尔多斯盆地东缘二叠系煤层气开发“甜点”地区基本地质特征分析[J]. 地学前缘,2011,18(4):219−223.
LIU Yijun. Geological characteristics of the “sweet spot” of Permian coal bed methane exploitation in the eastern margin of the Ordos Basin[J]. Earth Science Frontiers,2011,18(4):219−223.
|
| [26] |
张军建,韦重韬,陈玉华,等. 多煤层区煤层气开发优选评价体系分析[J]. 煤炭科学技术,2017,45(9):13−17.
ZHANG Junjian,WEI Chongtao,CHEN Yuhua,et al. Analysis on optimized evaluation system of coalbed methane development in multi seams area[J]. Coal Science and Technology,2017,45(9):13−17.
|
Supported by: Beijing Renhe Information Technology Co., Ltd. 
DownLoad: