基于地层水指标的页岩气保存条件评价——以渝东南地区五峰组—龙马溪组页岩气藏为例

doi:10.13809/j.cnki.cn32-1825/te.2021.01.007

Abstract

Abstract:

Significant progress has been made in the exploration and development of shale gas in the Wufeng-Longmaxi Formation of Sichuan Basin, but shale gas content varies greatly among different well locations. Through the analysis of formation water salinity, geochemical index and formation water type in Well-PY1HF, Well-JY1HF, Well-NY1HF, Well-LY1 and other wells in Southeastern Chongqing, it is found that CaCl₂ water type reflects good shale gas preservation conditions, while the water types of NaHCO₃ and Na₂SO₄ reflect formation water and atmospheric water are interconnected to different extent, leading to a relatively poor preservation condition. Based on the characteristics of large-scale faults and residual syncline structures developing in Southeastern Chongqing and the formation water characteristics of Wufeng-Longmaxi Formation, the groundwater seepage mode can be divided into two types: the infiltration type in the large-scale fault development area and the centripetal flow type in the residual syncline area, corresponding to different shale gas preservation conditions. In the area with large-scale faults, the surface water infiltrates deeply along the faults, causing great damage to shale gas reservoir, most of them contain few gases. The formation water in the residual syncline is centripetal flow, and the deep part of the syncline is relatively well preserved. The surface water and the formation water form a free alternating zone at the syncline edge, and the preservation condition of shale gas reservoir is poor, thus the gas bearing property is poor. In the core part of the syncline, the closer to the core part, the weaker the influence of atmospheric water infiltration is, and the better the preservation condition will be.

Key words: Southeastern Chongqing, formation water, shale gas, preservation condition, salinity, chemical index

CLC Number:

TE37

Zhang Guangrong,Nie Haikuan,Tang Xuan,Zhang Peixian,Peng Yongmin. Evaluation of shale gas preservation conditions based on formation water index: A case study of Wufeng-Longmaxi Formation in Southeastern Chongqing[J].Reservoir Evaluation and Development, 2021, 11(1): 47-55.

Figures/Tables 9

Fig. 1

Table 1

Table 2

Table 3

Table 4

Fig. 2

Fig. 3

Fig. 4

Fig. 5

References 31

[1]	Nie H K, He Z L, Wang R Y, et al. Temperature and origin of fluid inclusions in shale veins of Wufeng-Longmaxi Formations, Sichuan Basin, south China: Implications for shale gas preservation and enrichment[J]. Journal of Petroleum Science and Engineering, 2020,193.
[2]	Li Y Z. Mechanics and fracturing techniques of deep shale from the Sichuan Basin, SW China[J]. Energy Geoscience, 2021,2(1):1-9. doi: 10.1016/j.engeos.2020.06.002
[3]	马新华, 谢军. 川南地区页岩气勘探开发进展及发展前景[J]. 石油勘探与开发, 2018,45(1):161-169.
	Ma Xinhua, Xie Jun. The progress and prospects of shale gas exploration and exploitation in southern Sichuan Basin, NW China[J]. Petroleum Exploration and Development, 2018,45(1):161-169.
[4]	Zhao Z H, Wu K D, Fan Y, et al. An optimization model for conductivity of hydraulic fracture networks in the Longmaxi shale, Sichuan basin, Southwest China[J]. Energy Geoscience, 2020,1(1-2):47-54. doi: 10.1016/j.engeos.2020.05.001
[5]	Morozov V P, Jin Z J, Liang X P, et al. Comparison of source rocks from the Lower Silurian Longmaxi Formation in the Yangzi Platform and the Upper Devonian Semiluksk Formation in East European Platform[J]. Energy Geoscience, 2021,2(1):63-72. doi: 10.1016/j.engeos.2020.10.001
[6]	郭彤楼, 张汉荣. 四川盆地焦石坝页岩气田形成与富集高产模式[J]. 石油勘探与开发, 2014,41(1):28-36.
	Guo Tonglou, Zhang Hanrong. Formation and enrichment mode of Jiaoshiba shale gas field, Sichuan Basin[J]. Petroleum Exploration and Development, 2014,41(1):28-36.
[7]	聂海宽, 包书景, 高波, 等. 四川盆地及其周缘下古生界页岩气保存条件研究[J]. 地学前缘, 2012,19(3):280-294.
	Nie Haikuan, Bao Shujing, Gao Bo, et al. A study of shale gas preservation conditions for the Lower Paleozoic in Sichuan Basin and its periphery[J]. Earth Science Frontiers, 2012,19(3):280-294.
[8]	Hao F, Zou H Y, Lu Y C. Mechanisms of shale gas storage: Implications for shale gas exploration in China[J]. AAPG Bulletin, 2013,97(8):1325-1346. doi: 10.1306/02141312091
[9]	梁晓伟, 牛小兵, 李卫成, 等. 鄂尔多斯盆地油田水化学特征及地质意义[J]. 成都理工大学学报(自然科学版), 2012,39(5):502-508.
	Liang Xiaowei, Niu Xiaobing, Li Weicheng, et al. Chemical character of oil-field water in Ordos Basin and geological significance[J]. Journal of Chengdu University of Technology(Science & Technology Edition), 2012,39(5):502-508.
[10]	何顺, 秦启荣, 范存辉, 等. 川东南丁山地区页岩气保存条件分析[J]. 油气地质与采收率, 2019,26(2):24-31.
	He Shun, Qin Qirong, Fan Cunhui, et al. Shale gas preservation conditions in Dingshan area, Southeastern Sichuan[J]. Petroleum Geology and Recovery Efficiency, 2019,26(2):24-31.
[11]	杨冬, 虞兵, 唐浩, 等. 大宛齐油田地层水化学特征与油气保存条件分析[J]. 石油地质与工程, 2013,27(4):27-30.
	Yang Dong, Yu Bing, Tang Hao, et al. Chemical characteristics of formation water and analysis of oil and gas preservation conditions in Dawanqi Oilfield[J]. Petroleum Geology and Engineering, 2013,27(4):27-30.
[12]	黎琼, 欧光习, 汪生秀, 等. 渝东南地区五峰组—龙马溪组页岩气储层流体地球化学特征——以酉参2井为例[J]. 地球科学与环境学报, 2019,41(5):529-540.
	Li Qiong, Ou Guangxi, Wang Shengxiu, et al. Geochemical characteristics of fluid from shale gas reservoir of Wufeng-Longmaxi Formations in the Southeastern Chongqing, China——A case study of Well YC2[J]. Journal of Earth Sciences and Environment, 2019,41(5):529-540.
[13]	何希鹏, 高玉巧, 唐显春, 等. 渝东南地区常压页岩气富集主控因素分析[J]. 天然气地球科学, 2017,28(4):654-664.
	He Xipeng, Gao Yuqiao, Tang Xianchun, et al. Analysis of major factors controlling the accumulation in normal pressure shale gas in the southeast of Chongqing[J]. Natural Gas Geoscience, 2017,28(4):654-664.
[14]	He X P, Zhang P X, He G S, et al. Evaluation of sweet spots and horizontal-well-design technology for shale gas in the basin-margin transition zone of southeastern Chongqing, SW China[J]. Energy Geoscience, 2020,1(3-4):134-146. doi: 10.1016/j.engeos.2020.06.004
[15]	聂海宽, 张柏桥, 刘光祥, 等. 四川盆地五峰组—龙马溪组页岩气高产地质原因及启示——以涪陵页岩气田JY6-2HF为例[J]. 石油与天然气地质, 2020,41(3):463-473.
	Nie Haikuan, Zhang Baiqiao, Liu Guangxiang, et al. Geological factors contributing to high shale gas yield in the Wufeng-Longmaxi Fms of Sichuan Basin: A case study of Well JY6-2HF in Fuling shale gas field[J]. Oil & Gas Geology, 2020,41(3):463-473.
[16]	方志雄. 中国南方常压页岩气勘探开发面临的挑战及对策[J]. 油气藏评价与开发, 2019,9(5):1-13.
	Fang Zhixiong. Challenges and countermeasures for exploration and development of normal pressure shale gas in southern China[J]. Reservoir Evaluation and Development, 2019,9(5):1-13.
[17]	Land L S. Na-Ca-Cl saline formation waters, Frio Formation(Oligocene), south Texas, USA: Products of diagenesis[J]. Geochimica et Cosmochimica Acta, 1995,59(11):2163-2174. doi: 10.1016/0016-7037(95)00098-K
[18]	Wang H Y, Shi Z S, Zhao Q, et al. Stratigraphic framework of the Wufeng-Longmaxi shale in and around the Sichuan Basin, China: Implications for targeting shale gas[J]. Energy Geoscience, 2020,1(3-4):124-133. doi: 10.1016/j.engeos.2020.05.006
[19]	陈勇, 王淼, 王鑫涛, 等. 东营凹陷沙四段地层水化学特征及其指示意义[J]. 中国石油大学学报(自然科学版), 2015,39(4):42-52.
	Chen Yong, Wang Miao, Wang Xintao, et al. Chemical characteristics and implications of formation water of the Es_4 Member in Dongying sag[J]. Journal of China University of Petroleum(Edition of Natural Science), 2015,39(4):42-52.
[20]	Hanor J S. Origin of saline fluids in sedimentary basins[J]. Geological Society London Special Publications, 1994,78(1):151-174. doi: 10.1144/GSL.SP.1994.078.01.13
[21]	楼章华, 金爱民, 朱蓉, 等. 论松辽盆地地下水动力场的形成与演化[J]. 地质学报, 2001,80(1):111-120.
	Lou Zhanghua, Jin Aimin, Zhu Rong, et al. On the formation and evolution of groundwater dynamic field in Songliao Basin[J]. Acta Geologica Sinica, 2001,80(1):111-120.
[22]	楼章华, 朱蓉. 中国南方海相地层水文地质地球化学特征与油气保存条件[J]. 石油与天然气地质, 2006,27(5):584-593. doi: 10.11743/ogg20060502
	Lou Zhanghua, Zhu Rong. Hydrogeological and hydrogeochemical characteristics and hydrocarbon preservation conditions in marine strata in southern China[J]. Oil & Gas Geology, 2006,27(5):584-593. doi: 10.11743/ogg20060502
[23]	马永生, 楼章华, 郭彤楼, 等. 中国南方海相地层油气保存条件综合评价技术体系探讨[J]. 地质学报, 2006,85(3):406-417.
	Ma Yongsheng, Lou Zhanghua, Guo Tonglou, et al. An exploration on a technological system of petroleum preservation evaluation for marine strata in South China[J]. Acta Geologica Sinica, 2006,85(3):406-417.
[24]	Zheng H R, Zhang J C, Qi Y C. Geology and geomechanics of hydraulic fracturing in the Marcellus shale gas play and their potential applications to the Fuling shale gas development[J]. Energy Geoscience, 2020,1(1-2):36-46. doi: 10.1016/j.engeos.2020.05.002
[25]	Li Y, Zhou D H, Wang W H, et al. Development of unconventional gas and technologies adopted in China[J]. Energy Geoscience, 2020,1(1-2):55-68. doi: 10.1016/j.engeos.2020.04.004
[26]	李双建, 高波, 沃玉进, 等. 中国南方海相油气藏破坏类型及其时空分布[J]. 石油实验地质, 2011,33(1):43-49. doi: 10.11781/sysydz201101043
	Li Shuangjian, Gao Bo, Wo Yujin, et al. Destruction types and temporal-spatial distribution of marine hydrocarbon reservoirs in South China[J]. Petroleum Geology & Experiment, 2011,33(1):43-49. doi: 10.11781/sysydz201101043
[27]	Nie H K, Li D H, Liu G X, et al. An overview of the geology and production of the Fuling shale gas field, Sichuan Basin, China[J]. Energy Geoscience, 2020,1(3-4):147-164. doi: 10.1016/j.engeos.2020.06.005
[28]	Jin Z J, Nie H K, Liu Q Y, et al. Source and seal coupling mechanism for shale gas enrichment in upper Ordovician Wufeng Formation-Lower Silurian Longmaxi Formation in Sichuan Basin and its periphery[J]. Marine and Petroleum Geology, 2018,97:78-93. doi: 10.1016/j.marpetgeo.2018.06.009
[29]	聂海宽, 汪虎, 何治亮, 等. 常压页岩气形成机制、分布规律及勘探前景——以四川盆地及其周缘五峰组—龙马溪组为例[J]. 石油学报, 2019,40(2):131-143.
	Nie Haikuan, Wang Hu, He Zhiliang, et al. Formation mechanism, distribution and exploration prospect of normal pressure shale gas reservoir:a case study of Wufeng Formation-Longmaxi Formation in Sichuan Basin and its periphery[J]. Acta Petrolei Sinica, 2019,40(2):131-143.
[30]	何希鹏, 张培先, 房大志, 等. 渝东南彭水—武隆地区常压页岩气生产特征[J]. 油气地质与采收率, 2018,25(5):72-79.
	He Xipeng, Zhang Peixian, Fang Dazhi, et al. Production characteristics of normal pressure shale gas in Pengshui-Wulong area, southeast Chongqing[J]. Petroleum Geology and Recovery Efficiency, 2018,25(5):72-79.
[31]	张金川, 王志欣. 深盆气藏异常地层压力产生机制[J]. 石油勘探与开发, 2003,30(1):28-31.
	Zhang Jinchuan, Wang Zhixin. Formation mechanism of abnormal pressures in deep-basin gas accumulation[J]. Petroleum Exploration and Development, 2003,30(1):28-31.

井位	深度（m）	采样时间（d）
PY1HF	2 136~2 159	47~1 245
PY2HF	2 233~2 260	4~157
PY3HF	2 753~2 780	192~1 005
PY4HF	1 899~1 915	10~269
LY1	2 818~2 824	124~133
NY1HF	4 399~4 406	165~497
JY1HF	2 408~2 419	96~218
JY1-3HF	2 409~2 417	0~45

PY2HF井压裂液	K⁺+Na⁺	Ca²⁺	Mg²⁺	Cl^-	SO₄^2-	HCO₃^-	总矿化度
滑溜水+线性胶混合液	0.482	0.107		0.171	0.290	0.403	1.40
线性胶	0.571	0.070		0.231	0.216	1.394	2.40
滑溜水	1.511	0.097		2.246	0.260	0.279	4.30
PY2HF井	8.546	0.392	0.048	15.095	0.040	0.549	24.64

井位		离子含量（g/L）						总矿化度（g/L）	埋深（m）
井位		K⁺+Na⁺	Ca²⁺	Mg²⁺	Cl^-	SO₄^2-	HCO₃^-	总矿化度（g/L）	埋深（m）
PY1HF	范围值	10.884~22.510	0.585~1.053	0.046~0.157	17.219~36.470	0.041~0.566	0.186~0.623	29.8~54.6	2 136~2 159
PY1HF	平均值	14.851	0.776	0.076	27.705	0.234	0.376	43.98
PY2HF	范围值	4.674~12.992	0.310~0.613	0.032~0.054	9.359~25.294	0.005~0.070	0.310~0.650	15.0~39.2	2 233~2 260
PY2HF	平均值	8.546	0.392	0.048	15.095	0.040	0.549	24.64
PY3HF	范围值	13.120~21.380	0.078~0.991	0.012~0.117	24.066~39.298	0.032~0.165	0.310~0.652	38.0~59.3	2 753~2 780
PY3HF	平均值	16.085	0.830	0.072	31.102	0.104	0.376	48.58
PY4HF	范围值	4.989~13.273	0.299~0.761	0.005~0.095	8.895~27.881	0.036~0.114	0.124~0.898	15.1~42.1	1 899~1 915
PY4HF	平均值	11.354	0.600	0.071	23.928	0.068	0.289	36.28
LY1	范围值	11.516~11.770	0.245~0.269	0.038~0.105	11.174~11.528	8.991~9.117	0.888~0.941	32.9~33.5	2 818~2 824
LY1	平均值	11.618	0.257	0.065	11.344	9.052	0.900	33.25
NY1HF	范围值	7.759~10.819	0.147~1.634	0.004~0.029	13.423~25.295	0.004~0.138	0.279~1.582	23.5~38.3	4 399~4 406
NY1HF	平均值	9.160	0.327	0.017	17.050	0.051	0.647	27.26
JY1HF	范围值	1.384~14.200	0.049~0.373	0.022~0.081	1.926~21.509	0.021~0.360	1.448~1.550	4.1~37.9	2 408~2 419
JY1HF	平均值	6.515	0.174	0.043	9.542	0.229	1.316	17.75
JY1-3HF	范围值	1.372~5.877	0.162~0.249	0.095~0.113	1.385~8.666	0.123~0.823	1.491~1.538	5.4~16.4	2 409~2 417
JY1-3HF	平均值	3.625	0.205	0.104	5.026	0.473	1.514	10.90

井号		变质系数	钠氯系数	钙镁系数	脱硫系数	碳酸盐平衡系数	水型	埋深（m）
PY1HF	范围值	54.04~411.72	0.41~0.72	6.24~17.19	0.11~3.29	0.19~1.07	CaCl₂	2 136~2 159
PY1HF	平均值	204.76	0.54	11.63	1.17	0.56
PY2HF	范围值	65.95~238.04	0.48~0.70	6.60~12.90	0.03~0.42	0.59~1.91	CaCl₂	2 233~2 260
PY2HF	平均值	141.42	0.56	8.33	0.26	1.52
PY3HF	范围值	84.43~961.09	0.45~0.68	6.60~32.50	0.13~0.45		CaCl₂	2 753~2 780
PY3HF	平均值	315.75	0.51	13.21	0.33
PY4HF	范围值	146.87~1 209.20	0.46~0.54	6.10~65.04	0.16~1.27		CaCl₂	1 899~1 915
PY4HF	平均值	279.33	0.47	14.26	0.32
LY1	范围值		1.02~1.03	2.38~6.85	77.99~81.36	3.30~3.69	Na₂SO₄	2 818~2 824
LY1	平均值		1.024	4.35	79.81	3.51
NY1HF	范围值	267.47~856.79	0.40~0.69	9.74~67.98	0.03~1.06	0.26~5.95	CaCl₂	4 399~4 406
NY1HF	平均值	493.20	0.51	19.83	0.39	2.60
JY1HF	范围值	6.04~712.45	0.02~0.90	1.98~12.37	1.07~14.40	1.21~29.39	CaCl₂	2 408~2 419
JY1HF	平均值	206.54	0.59	4.46	6.29	10.47
JY1-3HF	范围值	12.23~91.12		1.70~2.20	1.40~37.28	6.18~9.21	NaHCO₃	2 409~2 417
JY1-3HF	平均值	51.67		1.95	19.34	7.70

Evaluation of shale gas preservation conditions based on formation water index: A case study of Wufeng-Longmaxi Formation in Southeastern Chongqing

RichHTML

PDF (PC)

Like

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 9

References 31

Related Articles 15

Metrics

Comments

Recommended 10

[1]	YAO Hongsheng, WANG Wei, HE Xipeng, ZHENG Yongwang, NI Zhenyu. Development practices of geology-engineering integration in complex structural area of Nanchuan normal pressure shale gas field [J]. Petroleum Reservoir Evaluation and Development, 2023, 13(5): 537-547.
[2]	LI Jingchang, LU Ting, NIE Haikuan, FENG Dongjun, DU Wei, SUN Chuanxiang, LI Wangpeng. Confidence evaluation of fractures seismic detection in shale gas formations on WY23 Pad in Weirong [J]. Petroleum Reservoir Evaluation and Development, 2023, 13(5): 614-626.
[3]	XIA Haibang, HAN Kening, SONG Wenhui, WANG Wei, YAO Jun. Pore scale fracturing fluid occurrence mechanisms in multi-scale matrix-fracture system of shale gas reservoir [J]. Petroleum Reservoir Evaluation and Development, 2023, 13(5): 627-635.
[4]	HAN Kening, WANG Wei, FAN Dongyan, YAO Jun, LUO Fei, YANG Can. Production forecasting for normal pressure shale gas wells based on coupling of production decline method and LSTM model [J]. Petroleum Reservoir Evaluation and Development, 2023, 13(5): 647-656.
[5]	XUE Gang, XIONG Wei, ZHANG Peixian. Genesis analysis and effective development of normal pressure shale gas reservoir: A case of Wufeng-Longmaxi shale gas reservoir in southeast margin of Sichuan Basin [J]. Petroleum Reservoir Evaluation and Development, 2023, 13(5): 668-675.
[6]	LOU Zhanghua, ZHANG Xinke, WU Yuchen, GAO Yuqiao, ZHANG Peixian, JIN Aimin, ZHU Rong. Fluid response characteristics of shale gas preservation differences in Nanchuan and its adjacent blocks in Sichuan Basin [J]. Petroleum Reservoir Evaluation and Development, 2023, 13(4): 451-458.
[7]	HU Zhijian, LI Shuxin, WANG Jianjun, ZHOU Hong, ZHAO Yulong, ZHANG Liehui. Productivity evaluation of multi-stage fracturing horizontal wells in shale gas reservoir with complex artificial fracture occurrence [J]. Petroleum Reservoir Evaluation and Development, 2023, 13(4): 459-466.
[8]	LIN Hun, SUN Xinyi, SONG Xixiang, MENG Chun, XIONG Wenxin, HUANG Junhe, LIU Hongbo, LIU Cheng. A model for shale gas well production prediction based on improved artificial neural network [J]. Petroleum Reservoir Evaluation and Development, 2023, 13(4): 467-473.
[9]	LIU Honglin,ZHOU Shangwen,LI Xiaobo. Application of PCA plus OPLS method in rapid reserve production rate prediction of shale gas wells [J]. Petroleum Reservoir Evaluation and Development, 2023, 13(4): 474-483.
[10]	YANG Yu,XU Qilin,LIU Ronghe,HUANG Dongjie,YAN Ping,WANG Jianmeng. Phase equilibrium law of CO₂ storage in depleted gas reservoirs [J]. Petroleum Reservoir Evaluation and Development, 2023, 13(3): 280-287.
[11]	WANG Jianmeng,CHEN Jie,JI Lidong,LIU Ronghe,ZHANG Qian,HUANG Dongjie,YAN Ping. Research progress and prospect of state equation in CO₂ storage [J]. Petroleum Reservoir Evaluation and Development, 2023, 13(3): 305-312.
[12]	LU Bi,HU Chunfeng,MA Jun. Influencing factors and countermeasures of inter-well interference of fracturing horizontal wells in Nanchuan shale gas field [J]. Petroleum Reservoir Evaluation and Development, 2023, 13(3): 330-339.
[13]	QIU Xiaoxue,ZHONG Guanghai,LI Xiansheng,CHEN Meng,LING Weitong. CFD simulation of flow characteristics of shale gas horizontal wells with different inclination [J]. Petroleum Reservoir Evaluation and Development, 2023, 13(3): 340-347.
[14]	NIE Yunli, GAO Guozhong. Classification of shale gas “sweet spot” based on Random Forest machine learning [J]. Petroleum Reservoir Evaluation and Development, 2023, 13(3): 358-367.
[15]	ZHANG Longsheng,WANG Weiheng. Study and application of a high temperature foaming agent in anionic-nonionic system namely HDHP: A case study of shale gas wells in Dongsheng Block, Sichuan Basin [J]. Reservoir Evaluation and Development, 2023, 13(2): 240-246.