Carbonate fracture-cave reservoir prediction with prestack AVO
Chen Jun1,2, Zhang Huquan1,2, Wang Jinxi,12, Wang Hongbin1,2, Chen Fangfang3, Meng Xiangxia1,2
1. Northwest Branch, Research Institute of Petroleum Exploration and Development, PetroChina, Lanzhou, Gansu 730020, China;
2. Key Laboratory of Reservoir Description, CNPC, Lanzhou, Gunsu 730020, China;
3. Research Institute of Petroleum Exploration and Development, Tarim Oilfield Company, PetroChina, Korla, Xinjiang 841000, China
Abstract:There are typical carbonate reservoirs with different types and serious heterogeneity in Yingmai A area, Tarim Basin. Hydrocarbon distribution is irregular in these carbonate reservoirs, which affects oil & gas production increase. Based on geological, logging, and seismic data, we analyze seismic response characteristics of different geo-genetic reservoirs in this paper, and extract seismic attributes to predict carbonate reservoirs. It is found that hydrocarbon in carbonate reservoirs with "bead-like reflection" and "strong flaky-like reflection" could be effectively detected by prestack AVO. Then, based on rock physic methods, fluid substitution modeling is conducted to analyze AVO sensitive attribute to predict hydrocarbon distribution in these two types of carbonate reservoirs. Real drilling data prove that hydrocarbon prediction with prestack AVO obtains good results and has significance for the future well deployment.
Li Sumei,Pang Xiongqi,Yang Haijun. Geochemical characteristics and families of the crude oils in the Yingmaili Oilfield,Tarim Basin. Geoscience,2010,24(4): 643-653.
Wei Pingsheng,Pan Jianguo,Zhang Huquan et al. Application and research of the petroleum seismic reservoir: a case study of carbonate reservoirs in the central Tarim Basin. Acta Petrolei Sinica,2013,34(3):496-501.
Ni Xinfeng,Zhang Lijuan,Shen Anjiang et al. Diagenesis and pore evolution of the Ordovician Karst reservoir in Yengimahalla-Hanilcatam region of Tarim Basin. Journal of Palaeogeography,2011,29(3):465-473.
Jiang Hua,Zhang Yanqiu,Pan Wenqing et al. Carbonate reservoir features and Karst mode in the Yingmai-2 well field of Tabei uplift. Acta Petrolei Sinica,2013, 34(2):222-238.
Liu Jianxin et al. Technique optimum of prediction to fractured reservoirs: An example of Ordovician fractured reservoir in Tabei region, Tarim Basin. Marine Origin Petroleum Geology,2010,15(3):49-52.
Yao Qingzhou,Meng Xiangxia,Zhang Huquan et al. Principles and application of a seismic trend anomaly diagnostic technique: a case study on carbonate fractured-cavity reservoirs in Yingmai 2 area, Tarim Basin. Acta Petrolei Sinica,2013,34(1):101-106.
He Cheng,Cai Youhong,Li Han et al. Application of AVO attributes crossplot interpretation technique to predict carbonate reservoir. OGP,2005,40(6):711-715.
Shen Feng,Qian Shaoxin,Liu Wenlin. The application of AVO multiple parameter inversion in gas sand detection and reservoir quantitative examination. Acta Petrolei Sinica,1994,15(2):11-19.