松辽盆地南部梨树凹陷石油化探壤气汞测量的地质意义

GEOLOGICAL SIGNIFICANCE OF SOIL-GAS-HYDRARGYRUM MEASUREMENTS OF PETROLEUM GEOCHEMICAL EXPLORATION IN LISHU DEPRESSION OF SONGLIAO BASIN

岳洪礼

Yue Hongli

地质矿产部石油地质综合大队101队

101 Team, Research Party of Petroleum Geology, Ministry of Geology and Mineral Resources

我队自1978年以来,先后在江汉、冀中、苏北、泌阳、四川、松南、南方碳酸盐地区(包括句容、黄桥)等不同沉积环境、构造单元、地貌单元等研究分散汞的相对富集体,开展石油化探浅层(0.4-1.0米)壤气汞测量与应用。实践表明,天然气均含有较高的浓度的汞,如江汉油田、冀中柳泉气田、泌阳双河和下二门油田、松南红岗油田等,其天然气含汞量(ng/m3)分别为170-450、147-637、351-684和53-146、200-1600。成为油气田上壤气汞的主要源。

Based on the geochemical characteristics of soil-gas-hydrargyrum measurements combined with other geochemical exploration indexes and characteristics of petroleum geology, the integrated studies were made on Lishu Depression, in Songliao Basin in this paper. Thereafter, analyses of soil-gas-hydrargyrum are carried out in a certain research area, with 384 sampling points in which 80 points are abnormal with a probability of 20. 83%. Most of the abnormal measurement points are clustered: 1)The abnormal points of the northern part of the research area are clustered in Shiwu-Sangshutai Fault Block and No. 1, 2, 3, and 4 abnormal blocks; 2) The abnormal points of the southern part of the research area (4 controlling lines) concentrate at Shenyang, Kaoshantun, Yushutai and Shuang shan-Xinglitun in which oil traces and spots are observed at depths of 400-500m proved by drilling at No.4 Abnormal Block. (Xiaokuanwobao).

https://doi.org/10.11781/sysydz198602164