摘要
根据南方古生代碳酸盐岩分布区18个剖面点以成岩作用为主的研究,作了孔隙演化同有机质演化和构造演化三者之间配置关系的分析,并进一步把成藏条件划分出三种不同的组合类型,即:凯里型、建南型、泰山型,并对其进行研究。
Based mainly on a study of the diagenesis of eighteen profiles the carbonate rocks in south China,this paper mainly analyses the relation between por- osity,organic matters and tectonic evolutions,and three different kinds of pool-forming factors associations are divided. The first kind is named as Kaili type.It refers to the hydrocarbon-bear- ing micro-finely crystalline bioclastic limestone in the lower part of Dawan formation(Lower Ordovician)in Kaili area,Guizhou province.Its main cha- racteristics are maintaining higher porosity during its long period of undula- ting process of burial,but in the later rapidly buried process occured in a short period the porosity is sharply lost.Dissolution of the buried organic matter played an important role to the formation of effective porosity delay- ed hydrocarbon-forming gives some suplernent to the insufficy of the late- formed trap,and,it is indicated that Kaili type is an oil-forming asso- ciation. The second kind is Jiannan type.It is association of the porosity,orga- nic and tectonic evolutions of Changxing in the bioreef(Upper Permian sys- tern)in Jiannan area,Hubei province.Its characteristics can be summarized as follows:There is a history of continuous burial after sedimentation of the reef and all the porosity had been lost while reaching the maximum depth of burial.Organic dissolution is the only way to develop its effective poros- ity;Porosity and organic evolutions did not match the structure-forming. All the characteristics above indicate that it is a gas-forming association. The third one is Taishan type.It's an association of the porosity,orga- nic and tetonic evolutions represented by the algal dolomite pool-forming conditions in Xifengsi formation(Upper Sinian system)in Taishan area, Zhejiang province.It displays the following characteristic:Paleo-structure karst was the dominant factor of effective porosity development;There was a best association relationship between organic evolution and the trap- forming time.Though it is a good oil forming association,the oil has been cracked because of the earlier deep burial,and in the later uplift to earth's surface,the pool completely destroyed.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
1992年第2期82-90,共9页
Petroleum Exploration and Development
