Control Factors of Chang 4+5 Reservoir Properties in Jiyuan Oilfield

Abstract:

Discovered in recent years, Chang 4+5 reservoir group of Yanchang Formation in Jiyuan area is ultra-low permeability reservoir. The evaluation and prediction of the reservoir is the most critical technology in reservoir development. Comprehensive analysis with multiple research approaches shows that the storage potential of the ultra-low permeability reservoir is jointly controlled by sedimentation and diagenesis. Sedimentary factor includes lithology and sedimentary facies, two basic factors affecting the storage potential. The reservoir lithology is of fine-grained debris-arkose and miliary arkose. Pore types are mainly intergranular pores and dissolved pores. The sandstone microfacies in the delta front underwater distributary channel has the best storage potential. Diagenetic factors, including diagenesis types, evolution, intensity, combination etc., have direct influence on the reservoir storage potential. Compaction and calcite cementation are the main factors that weaken the storage potential, whereas carbonate dissolution, especially the dissolution of feldspar plays an important role in the improvement of the storage potential.

• Periodical: Advanced Materials Research (Volumes 734-737)
• Pages: 1171-1174
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.734-737.1171
• Online since: August 2013
• Authors: Qi Zhou*, Yan Yi Yin
• Keywords: Chang 4+5, Diagenesis, Jiyuan Oilfield, Porosity Evolution, Sedimentation, Storage Potential, Ultra-Low Permeability Reservoirs

References

[1] Shaohua Zeng: Oil & Gas Geology, Vol. 13, No. 2, pp.229-235, 1992, In Chinese.

[2] Kai Song, Jianwen Lu, Jinliang Du, Hongke Wang: Journal of Palaeogeography, Vol. 4, No. 3, pp.59-66, 2002, In Chinese.

[3] Hua Yang, Weitan Dou, Jian Yu: China Petrleum Exploration, Vol. 8, No. 1, pp.32-40, 2003, In Chinese.

[4] Yongsheng Nie, Jingchun Tian, Qingsong Xia: Oil & Gas Recovery Technology, Vol. 11, No. 5, pp.4-6, 2004, In Chinese.

[5] Fuli Wu, Wenhou Li, Yuhong Li, Shengli Xi: Journal of Palaeogeography, Vol. 6, No. 3, pp.307-315, 2004, In Chinese.

[6] Feng Wang, Duoyun Wang, Mingshu Gao, Yongchao Yao, Zhikun Wang, Shutong Li, Hong Qin: Acta Sedimentologica Sinica, Vol. 23, No. 2, pp.218-224, 2005, In Chinese.

[7] Fengjie Li, Duoyun Wang: Natural Gas Geoscience, Vol. 17, No. 6, pp.775-778, 2006, In Chinese.

[8] Xuefeng Shi, Haifeng Du: Lithologic Reservoirs, Vol. 20, No. 1, pp.59-63, 2008, In Chinese.

[9] Shutong Li, Duoyun Wang, Bin Wang, Huifei Tao, Zhiwei Liu: Natural Gas Geoscience, Vol. 19, No. 1, pp.83-88, 2008, In Chinese.

[10] Changyong Wang, Rongcai Zheng, Chengyu Wang, Xiaobing Niu, Honggang Xin, Xiaowei Liang: Lithologic Reservoirs, Vol. 22, No. 2, pp.84-89, 2010, In Chinese.

[11] Qi Wang, Xizhun Zhuo, Guojun Chen, Ji'an Shi, Duoyun Wang: Acta Sedimentologica Sinica, Vol. 23, No. 3, pp.397-405, 2005, In Chinese.

[12] Yanping Lei, Shuqing Zhou, Fang Yang: Special Oil & Gas Reservoirs, Vol. 13, No. 6, pp.15-19, 2006, In Chinese.

[13] Yingchun Gou, Jianqi Li, Hongjun Zheng, Jun Peng: Natural Gas Geoscience, Vol. 18, No. 3, pp.360-364, 2007, In Chinese.

[14] Renchao Yang, Aiping Fan, Zuozhen Han, Yiqun Liu: Journal of Northwest University (Natural Science Edition), Vol. 37, No. 4, pp.626-630, 2007, In Chinese.

[15] Bo Xu, Wei Sun: Journal of Jilin University (Earth Science Edition), Vol. 38, No. 6, pp.953-958, 2008, In Chinese.

[16] Wei Fu, Junxing Zhao, Lili Liu: Natural Gas Geoscience, Vol. 20, No. 4, pp.531-537, 2009, In Chinese.

[17] Rui Zhang, Qi Wang, Jingli Yao, Shutong Li, Xiaoyan Li, Lewei Hao: Natural Gas Geoscience, Vol. 21, No. 6, pp.890-896, 2010, In Chinese.

[18] Gang Gao, Yonglin Han, Hongche Fan, Yinhui Wang, Xinwei Liang, Honggang Xin: Natural Gas Geoscience, Vol. 22, No. 4, pp.576-581, 2011, In Chinese.

[19] Fangping Chen, Bin Shi, Rongxi Li, Min Wang: Xinjiang Petroleum Geology, Vol. 32, No. 4, pp.366-369, 2011, In Chinese.