鄂尔多斯盆地靖安地区延长组储层有效开发的应力判据

• Published in: Beijing da xue xue bao Vol. 54; no. 3; pp. 573 - 578
• Main Authors: Lu, Xiangwei, Du, Shuheng, Zheng, Kui, Zhang, Huanguo, Wang, He, Sun, Tong
• Format: Journal Article
• Language: Chinese
• Published: Beijing Acta Scientiarum Naturalium Universitatis Pekinenis 01.01.2018; 中国石油天然气股份有限公司长庆油田分公司第六采油厂,西安,710299%北京大学地球与空间科学学院,北京 100871; 北京大学石油与天然气研究中心, 北京 100871
• Subjects: Flooding; Fractures; Oil recovery; Permeability; Pharynx; 水力压裂缝; stress; Ordos Basin; 鄂尔多斯盆地; 原油采收率; hydraulic fracture; 应力; oil recovery
• ISSN: 0479-8023
• DOI: 10.13209/j.0479-8023.2017.178

Through the analysis of casting thin sections, 3D geological modeling, special logging series and micro seismic monitoring, reservoir stress characteristics of Jing'an area were studied. The results show that: 1) the distribution of the direction of micro pore and throat would cause the stress anisotropy; 2) differences in each layer of Chang 4+52 sandstone are big, the lateral superposition characteristics of multi-periods channels have the major influence on stress distribution; 3) the stress difference in the study area is generally not large with the value of 3-6 MPa, with the development of water flooding development, the variation of the two main stress varies in the reservoir, resulting in the multi-directional development of fractures in the process of repeated fracturing. The results can provide a scientific basis for improving oil recovery in the middle and late development of low permeability reservoirs.