Enriching Factors of Carboniferous Gas in Tiandong Region, East Sichuan
-
摘要: 天东气区是近年来在川东石炭系发现的富矿,储集条件好,产量高,气富集不完全受构造圈闭控制。经研究发现,气的富集主要受开梁古隆起的控制,它不仅形成了一系列地层一构造复合圈闭,并在该区石炭系沉积相和成岩作用有利于孔洞发育的基础上,促使石炭系储层的有效厚度和孔洞更发育而具较好的储集条件。Abstract: The Tiandong gas region is of a rich ore discovered in East Sichuan (Chuandong) since recent years, that has a good accumulative condition, high productivity, not wholly controlled by structural trap for gas enrichment. Through research,it is discovered that gas enrichment is mainly controlled by Kaijiang-Liangping paleo-uplift. Which has formed not only a series of composite trap of stratigraphy and structure, and also promoted the still more development of the effective thickness and pores of Carboniferous reservoir resulting in better accumulative condition on the basis of Carboniferous sedimentation factes and diagenesis of this region, beneficial to the development of pores. Secondly, it is situated within the low synclinores between two high and steep anticlines of Datianchi and Nanmenchang; the structural position is low.,and the trap is mostly adjacent to broad syncline which has not only the performance of preferentially accumulating the upmigrating gas from the underlying Silurian gas-origin layer, but also has a large area of controlling oil and gas enrichment,abundant gas-source, and high filling degree for the trap. Lastly, the paper has concisely commented the gas-bearing conditions of various traps.
-
Key words:
- East Sichuan (Chuandong) /
- Carboniferous /
- gas /
- enrichment factors
-
[1] 1.陈宗清,1985,川东石炭系湘坪沉积区地层划分对比与找气t义.地质学报,59(2):87-96。
2.陈宗清,1985.川东中石炭世黄龙期沉积相及其与油气的关系,沉积学报,3 (1): 71-78。
3.Chen Zongqing, 1989. Oil and Gas Exploration in the Carboniferous Huanglong Formation in the Yangtze Region, Chi-na, Oruieme Congres International de Stratigraphie et de Geologie du Carbonifere, Compte Rendu Tome 5. p. 353一361. -

计量
- 文章访问数: 386
- HTML全文浏览量: 12
- PDF下载量: 416
- 被引次数: 0