| PDF: | |
| Time: | 2016 |
| Journal: | Journal of China University of Petroleum |
| Volumn: | 40 |
| Issue: | 2 |
| Pages: | 13-22 |
| Type: | EI |
| Author: | Yanquan Wang,Weihua Bian,Baohong Liu,Guozhong Gu,Ang Su,Pujun Wang |
Abstract: | Based on previous results of the reservoir porosity-permeability，oil-bearing occurrence and oil testing of 40 representativewells in eastern depression Liaohe Basin，the cut-off value of the reservoir physical properties and reasonable evaluation criteria of study area were evaluated using a series of approaches，including empirical coefficient method，irreducible water saturation method，oil occurrence method and formation testing method． The results show that when the porosity is less than 3%，or the permeability is less than 0.03×10－3 μm2 ，the reservoir usually is dry and does not contain any oil or gas．Therefore 3% porosity and 0.03×10－3 μm2 permeability are chosen as the cut-off values for effective reservoirs of the igneous rocks． Based on porosity，permeability，oil-bearing occurrence and oil testing results，the igneous rock reservoirs can be characterized into four classes: (I) high porosity and high permeability，(Ⅱ) high-medium porosity and permeability，(Ⅲ)medium porosity and permeability and (IV) low porosity and permeability． The evaluation criteria and the cut-off values objectively describe the characteristics of igneous rock reservoir and can be applied preferably in decision-making for oil and gas exploration． |