Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1306/09051817138 |
Wettability and connectivity of overmature shales in the Fuling gas field, Sichuan Basin (China) | |
Yang, Rui1; Hu, Qinhong2,3; He, Sheng1; Hao, Fang2; Guo, Xusheng4; Yi, Jizheng5; Sun, Mengdi1 | |
2019-03-01 | |
发表期刊 | AAPG BULLETIN |
ISSN | 0149-1423 |
EISSN | 1558-9153 |
出版年 | 2019 |
卷号 | 103期号:3页码:653-689 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | The Fuling gas field in Sichuan Basin, China, has produced greater than 1.5 x 10(10) m(3) (0.53 tcf) of natural gas from overmature Upper Ordovician Wufeng and lower Silurian Longmaxi shales. To systemically investigate the characteristics of wettability and connectivity and to understand the underlying causes of production behavior, we study five samples of Wufeng and Longmaxi shales with different total organic carbon contents and mineral compositions. Complementary approaches include mercury intrusion capillary pressure (MICP), contact angle measurement, spontaneous imbibition and saturated diffusion, and tracer (both nonsorbing and sorbing) migration mapped via laser ablation inductively coupled plasma mass spectrometry. According to measured contact angles and imbibition tests conducted on aqueous (deionized water and brine) and oleic (n-decane) phases, Wufeng and Longmaxi shales are strongly oil wet and moderately strong water wet. The lower boundary of estimated permeability obtained from n-decane imbibition can reach 137 nd, which is higher than the geometric mean permeability derived from the MICP method (5.5-68.8 nd). Effective diffusion coefficients of the Wufeng and Longmaxi shales are in the range of 10(-13) m(2)/s (1.1 x 10(-12) ft(2)/s). Tests of imbibition and saturated diffusion using tracer-containing brine show that concentrations of nanometer-sized tracers decrease rapidly (a factor of >10) over a migration distance of a few millimeters from the sample edge, suggesting the presence of poorly edge-connected water-wet pores. Sparsely connected hydrophilic pores, mixed wettability, and highly restricted pathways collectively contribute to the limited migration of nano-sized tracers, which probably results in the production behavior of initial steep decline and low overall recovery in the Fuling gas field. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000459337700007 |
WOS关键词 | THERMOCHEMICAL SULFATE REDUCTION ; MISSISSIPPIAN BARNETT SHALE ; EAGLE FORD FORMATION ; ORGANIC-RICH WUFENG ; HOSTED PORE SYSTEM ; SPONTANEOUS IMBIBITION ; LONGMAXI SHALE ; RELATIVE PERMEABILITY ; WATER IMBIBITION ; JIAOSHIBA AREA |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/24533 |
专题 | 地球科学 |
作者单位 | 1.China Univ Geosci, Key Lab Tecton & Petr Resources, Minist Educ, Wuhan, Hubei, Peoples R China; 2.China Univ Petr East China, Sch Geosci, Qingdao, Shandong, Peoples R China; 3.Univ Texas Arlington, Dept Earth & Environm Sci, Arlington, TX 76019 USA; 4.Sinopec, Explorat Co, Chengdu, Sichuan, Peoples R China; 5.Sinopec, Jianghan Oilfield Branch Co, Wuhan, Hubei, Peoples R China |
推荐引用方式 GB/T 7714 | Yang, Rui,Hu, Qinhong,He, Sheng,et al. Wettability and connectivity of overmature shales in the Fuling gas field, Sichuan Basin (China)[J]. AAPG BULLETIN,2019,103(3):653-689. |
APA | Yang, Rui.,Hu, Qinhong.,He, Sheng.,Hao, Fang.,Guo, Xusheng.,...&Sun, Mengdi.(2019).Wettability and connectivity of overmature shales in the Fuling gas field, Sichuan Basin (China).AAPG BULLETIN,103(3),653-689. |
MLA | Yang, Rui,et al."Wettability and connectivity of overmature shales in the Fuling gas field, Sichuan Basin (China)".AAPG BULLETIN 103.3(2019):653-689. |
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