Pore structure and influencing factors of reservoir of Sangonghe Formation in Baijiahai area, Junggar Basin
LIAN Xiao-cui1,WANG Zhen-qi1, YE Chun2, LIU Zuo-qiang1, LI Shi-tao1 (1. Key Laboratory of Exploration Technologies for Oil and Gas Resources, Ministry of Education, Yangtze University, Jingzhou 434023, China; 2. Research Institute of Petroleum Exploration and Development, Xinjiang Oilfield Company, PetroChina, Urumqi 830013, China)
The first and second members of Sangonghe Formation in Baijiahai area are the important exploration target zones. The cast thin section, scanning electronic microscope, cast image analysis and mercury injection analysis are applied to analyze the pore structure of Sangonghe Formation reservoir in Baijiahai area. The main pores of Sangonghe Formation are residual primary intergranular pore and secondary dissolved pore. The throat types are lamellar or curved lamellar and bundle tubular. Based on the result of pore structure calculation, the throats are divided into five types. The throats of the second member of Sangonghe Formation are mainly typeⅡ and Ⅲ, and the throats of the first member of Sangonghe Formation are type Ⅲ throat. The main influencing factors of the pore structure are sedimentation and diagenesis, and the cementation and dissolution are dominant factors.
【CateGory Index】： P618.13