松辽盆地十屋断陷水动力场与低压气藏的关系

楼章华; 卢庆梅; 赵庆吉; 肖海燕; 唐黎明

doi:10.11743/ogg19960411

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松辽盆地十屋断陷水动力场与低压气藏的关系
HYDRODYNAMIC FIELDS AND LOW-PRESSURE GAS POOLS IN SHIWU FAULT-DEPRESSION,SONGLIAO BASIN
1996年17卷第4期页码：321-325
网络首发：1996-12-25，

纸质出版：1996
DOI： 10.11743/ogg19960411
稿件说明：

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楼章华, 卢庆梅, 赵庆吉, 等. 松辽盆地十屋断陷水动力场与低压气藏的关系[J]. 石油与天然气地质, 1996,17(4):321-325. DOI： 10.11743/ogg19960411.

Lou Zhanghua, Lu Qingmei, Zhao Qingji, et al. HYDRODYNAMIC FIELDS AND LOW-PRESSURE GAS POOLS IN SHIWU FAULT-DEPRESSION,SONGLIAO BASIN[J]. 1996, 17(4): 321-325. DOI： 10.11743/ogg19960411.

摘要

松辽盆地十屋断陷在1250m以上为正常压实带

1500m以下为低压带

其间为压力过渡带

其对应的水动力场分别为自由水交替带

交替停滞带和交替阻滞带。由于交替阻滞带和交替停滞带天然气散失量大于地下水补给量

且愈下地下水补给量愈小

从而导致随埋深增加压力系数降低

形成低压气藏。交替阻滞带和交替停滞带中的气层才是该区的主要产气层。

Abstract

In Shiwu fault depression of Songliao Basin

sediments buried shallower than 1 250 mbelong to normal pressure zone;that deeper than 1 500 m belong to low-pressure zone sediments between above mentioned zones are in tranzitional zone. Hydrodynamic fields corresponding to these zones are respectively free replacing zone

obstructive replacing zone and irreplacing zone. The amounts of gas losses in the obstructive replacing and irreplacing zonesare greater than that of subsurface water leakage recharge

and the deeper the gas buried

theless the subsurface water recharge amount would be. This resulted in the decrease of

essurecoefficient with the Increasing of buried depth

and the formation of low-pressure gas pools. Itis considered that gas reservoirs in the obstructive replacing zone and irreplacing zone are themain productive beds of the region.