八面河油田沙子岭地区沙河街组四段成岩作用及孔隙演化

Diagenesis and Pore Evolution of Es4 in Shaziling Area of Bamianhe Oilfield

八面河油田沙子岭地区沙河街组四段(Es4)储层非均质性较强,系统分析区内成岩作用及孔隙演化对勘探开发实践和成岩理论研究都具有十分重要的意义。在对区内Es4岩矿资料进行综合整理后认为,成岩作用控制着该区储层孔隙演化过程。主要的成岩作用有3类,分别为压实作用、胶结作用和溶蚀作用,均发生于早成岩阶段的B期。其中,胶结作用和压实作用是原生孔隙和部分次生孔隙的主要破坏者;溶蚀作用是次生孔隙的主要建造者,其产生的溶孔、溶洞是油气的主要储集空间和运移通道。

The reservoir heterogeneity was strong in Es4 of Shaziling Area in Bamianhe Oilfield.So systematically researching the diagenesis and pore evolution was of great significance for exploration and development practice and the study of diagenetic theory.After a comprehensive study on field data of Es4,it is considered that in the area,reservoir pore evolution is controlled by the diagenesis.There are three main types of diageneses,such as the and the,which are mainly induced in Stage B of early diagenetic stage,Among them the cementation and compaction are the destroyers of the primary pores and secondary pores,the dissolution is the main builders of the secondary pores.And its dissolved pores and caves formed by dissolution are the main reservoir spaces and oil and gas migration paths.