Based on the research in the distribution and the development laws of the fractures in Liangjing low-permeability sandstone oilfield in Jilin province, the influences of the fractures on oil enrichment, moveable fluid saturation, seepage, pattern arrangement, water injection efficiency and artificial fracturing fracture distribution are studied.

Modeling of dual-porosity and dual-permeability for low-permeability sandstone reservoir;

The granularities of more than 2000 samples from 82 wells in the low-permeability sandstone reservoirs of Shengli oilfield were tested by the MS-2000 laser granulometric analyzer.

An experimental study on oil migration and accumulation in low-permeability sandstone;

Based on the comprehensive geological study of Niu-20, Chun-41, Zhuang-74 and Daluhu low-permeability sandstone oil pools, the research content and method of the geological model on the reservoir heterogeneity of low-permeability sendstone oil pools in Shengli oil district were sumarized systematically in this paper.

Threshold pressure gradient of low permeability sandstone;

The poor producing degree and the economic benefit of the low permeability sandstone by vague injection-production is caused by changeful sedimentary microfacies and high intra-layer and plane heterogeneity in whole oil reservoir set.

The structural fractures in fractured low permeability sandstone reservoirs have great effect on displacement efficiency.