The Tertiary seal is the most enclosed regional cap-rock, deposited from semi-closed bay and lagoon lake, with characterizing by the very large thickness(1000m), widely distributive province, very dense , and very high pore pressure and high breakthrough pressure(＞60MPa), which constructed the strain segmenting zone ,pore pressure barrier and the division of two forming-pool models-the Kelasu model and the Dawanqi model in the Kuche Depression. The characteristics of Kelasu model placed under the regional seal with the overpressure , in anticline trap ,and which one of the Dawabqi model placed upper the regional seal, with the normal-pressure, in many kinds of trap. It has been the one of the most important conditions of the oil and gas enrichment in this depression and the forming factors of the Kela 2 gigantic gas field. Some gas fields similar to Kela 2 will be discovered under the Tertiary seal.
About author: Zhou Xingxi, born on 1934, graduated from Department of Petroleum Geology of Beijing Geology College in 1958.Now he is professor in the Research Institute of Exploration and Development CNPC, and is engaged in nature gas geology and oil and gas pool geology.
Cite this article:
. The feature of the seal consisted of salty-gypsum layer in the Tertiary and the controlling process of oil and gaspool-forming in the Kuche Depression[J]. JOURNAL OF PALAEOGEOGRAPHY, 2000, 2(4): 51-57.
. The feature of the seal consisted of salty-gypsum layer in the Tertiary and the controlling process of oil and gaspool-forming in the Kuche Depression[J]. JOPC, 2000, 2(4): 51-57.
