| 摘要: |
| 川西新场气田中侏罗统上沙溪庙组气藏储层渗透率具强烈的非均质性,储层孔隙结构差异是导致这种非均质性的最直接因素。孔隙结构差异的主要地质成因一是砂岩碎屑组分和结构控制原生孔隙的发育程度;二是自生绿泥石衬垫的抗压实作用有效保护了原始孔隙喉道;三是在原生孔隙较为发育基础上的溶蚀作用有利于储层渗透性的进一步提高。此外,不同沉积环境中形成的各种层理构造同样对储层渗透性有一定影响。 |
| 关键词: 川西 气藏 储层 渗透性 |
| DOI： |
| 附件 |
| 投稿时间：2001-02-14 |
| 基金项目: |
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| Geological factors affecting reservoir permeability of the Upper Shaximiao Formation in the Xinchang gas field, western Sichuan |
| LU Zheng-xiang, QING Chun |
(1. Chengdu University of Technology, Chengdu 610059, Sichuan, China;
2. Western Sichuan Gas Development Corporation, Southwest China Bureau of Petroleum, Chengdu 610081, Sichuan, China) |
| Abstract: |
| The reservoir permeability of the Upper Shaximiao Fo rmation of M iddle Jurassic in the Xinchang gas field, western Sichuan is highly heterogeneous and controlled directly by reservoir pore structures. The main geological facto rs giving rise to the differences of pore structures are generalized as follow s. (1) The compositions and structures and textures of the sandstones determined the development of original pore spaces. (2) The anti-compression of the authigenic chlorite cement effectively protected prim ary intergranular pore spaces and early solution pore spaces. (3) The dissolution facilitates the enhancement of reservoir permeability. In addition, a variety of bedding structures formed in different environments has also exerted an effective influence on reservoir permeability. |
| Key words: western Sichuan gas pool reservoir permeability |
