石油勘探与开发2001，Vol.28Issue(2)：6-7,2.
深盆气预测与评价中的两个问题
Two problems on prediction and evaluation of deep basin gas
李明诚 1李先奇 2尚尔杰2
作者信息
- 1. 中国地质大学(北京
- 2. 中国石油天然气股份有限公司
- 折叠
摘要
Abstract
This article points out two problems on prediction and evaluation of deep basin gas in Erdos basin. The first problem is the tight reservoir.The effective reservoir of deep basin gas must have densified before the mass generation and expulsion of hydrocarbons from source rock, so do the “sweet points”.It is difficult to form the deep gas in the whole basin due to the strong heterogeneity of the tight reservoir in continental facies basin. Both the formation of tight reservoir and its “sweet points” should be done “timing research” in prediction and evaluation of deep basin gas. The second is the pressure of deep basin gas. The pressure of deep basin gas evolves from initial normal hydrostatic pressure to abnormal high pressure, then to abnormal low pressure, at last back to normal hydrostatic pressure, it indicates the geological process of deep basin gas, from generation to vanish. The lower the underpressure of deep basin gas, the nearer it vanishes in the time and space. There are many factors for underground fluid to form abnormal low pressure. It is some venturous to predict and evaluate the deep basin gas using equal height gas column to substitute water column, since either there are no more actual measure points of underpressure to control, or there is no guarantee of the continuous expansion of the tight reservoir关键词
陆相盆地/深层气/低渗透储集层/形成/时间/流体/异常压力/演化分类
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李明诚,李先奇,尚尔杰..深盆气预测与评价中的两个问题[J].石油勘探与开发,2001,28(2):6-7,2.
