Accumulation condition for Wufeng-Longmaxi Formation shale gas of Yanjin-Gongxian area

被引：0
|
作者：
Liang P.-P. [1 ]
Wang H.-Y. [2 ,3 ]
Zhao Q. [2 ,3 ]
Zhang Q. [2 ,3 ]
Wang N. [2 ,3 ]
Xiao Q.-H. [4 ]
机构：
[1] Institute of Porous Flow and Fluid Mechanic, China Academy of Science, Langfang
[2] Langfang Branch Research Institute of Petroleum Exploration and Development, Langfang
[3] National Energy Shale Gas Research and Development Center, Langfang
[4] School of Oil and Gas Engineering, Chongqing
来源：
Liang, Ping-Ping (296074368@qq.com) | 2016年 / Science Press卷 / 38期
关键词：
Accumulation condition; Main controlling factors; Wufeng-Longmaxi formation; Yanjin-Gongxian area;
D O I：
10.13374/j.issn2095-9389.2016.s1.037
中图分类号：
学科分类号：
摘要：
The formation conditions of shale gas in Wufeng-Longmaxi Formation of Yanjin-Gongxian area were analyzed on the basis of field observation and experimental data, and then the main factors for shale gas accumulation were discussed. Results show that black shale at the bottom of Wufeng-Longmaxi Formation is a deep-water shelf deposit product. The dessert shale gas from the first stage of Wufeng to the fourth stage of Longmaxi was complete. The organic carbon content is between 2.7%-6.0%. Mainly for the high organic carbon content, the thickness of black shale rich in organic matter is 30-50 m. In the high gas horizon, nanometer organic pores and pyrite intracrystalline pores are abundant, and the average rate of porosity is 2.28%-3.48%, providing a good reservoir space for the adsorbed gas and free gas. Structural strength in the research area is weak and large faults are less. There are good conditions of roof and floor. The pressure coefficient is more than 1, which reflects the suitable preservation condition. The main factors for shale gas accumulation are as follows: deep shelf sedimentary environment, high organic carbon content, abundant nanometer pores, high level porosity, and high pressure coefficient. © All right reserved.
引用
收藏
页码：224 / 231
页数：7
相关论文
共 13 条
  • [1] Zou C.N., Dong D.Z., Wang Y.M., Et al., Shale gas in China: Characteristics, challenges and prospects (I), Pet Explor Dev, 42, 6, (2015)
  • [2] Jia C.Z., Li B.L., Zhang X.Y., Et al., Formation and evolution of marine sedimentary basins of China, Chin Sci Bull, 52, (2007)
  • [3] Guo A.L., Cheng S.Y., Zhang C.F., Et al., Multi-phased fold structures and tectonic background analysis in southwest Sichuan province, J Northwest Univ (Nat Sci Ed), 39, 3, (2009)
  • [4] Guo Y.H., Li Z.F., Li D.H., Et al., Lithofacies palaeogeography of the Early Silurian in Sichuan area, J Palaeogeogr, 1, (2004)
  • [5] Chen X., Fan J.X., Zhang Y.D., Et al., Subdivision and delineation of the Wufeng and Lungmachi black shales in the subsurface areas of the Yangtze platform, J Stratigr, 4, (2015)
  • [6] Wang S.F., Zou C.N., Dong D.Z., Et al., Biogenic silica of organic-rich shale in Sichuan Basin and its significance for shale gas, Acta Sci Nat Univ Pekinensis, 50, 3, (2014)
  • [7] Wang F.P., Reed R.M., John A., Et al., Pore networks and fluid flow in gas shales, SPE Annual Technical Conference and Exhibition, (2009)
  • [8] Zou C.N., Zhu R.K., Bai B., Et al., First discovery of nano-pore throat in oil and gas reservoir in China and its scientific value, Acta Petrol Sin, 27, 6, (2011)
  • [9] Zhang Q., Liu C., Mei X.H., Et al., Status and prospect of research on microscopic shale gas reservoir space, Oil and Gas Geol, 36, 4, (2015)
  • [10] King G.R., Material balance method for coal measure and Devonian shale gas pool with limited water in flux, Nat Gas Explor Dev, 16, 3, (1994)
12