Characteristics Analysis of the Reservoir and Predominate
Channel in Block Jin-16

doi:10.11885/j.issn.1674-5086.2012.04.10.01

Abstract

Abstract:

Block Jin-16 is an oilfield typical of high-porosity and high-permeability. In the process of water-flooding development，
the injected water circulates along large pore channels，and the residual oil and water flooded zone scatter over the
rocks，which increased the difficulty to extract remaining oil. This paper mainly discusses the lithology characteristics，reservoir
space properties and the reasons for the formation of the advantaged channels based on the core data，casting lamella and
other information. It illustrates that the reservoir has low compaction，low cement content，rich argillaceous cementation and
poor rock cementation，which result in the formation of preferential channels in Block Jin-16. Another important aspect is that
the high initial porosity and permeability are enlarged by injected water during the later stage of production. The influence of
the pore space by water flushing and late physical and chemical reformation makes large channel seepage more obvious，and
further exacerbates the formation of advantage channel.

Key words: Block Jin-16, large pore, preferential channel, exploitation with injected water, high porosity and high permeability

Liu Hongqi1, Li Baoying2, Wang Wanfu3, Dai Chunming4, Tang Dan3. Characteristics Analysis of the Reservoir and Predominate
Channel in Block Jin-16[J]. 西南石油大学学报(自然科学版), DOI: 10.11885/j.issn.1674-5086.2012.04.10.01.

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