安塞油田长10 油藏初期产能地质影响因素分析

doi:10.3969/j.issn.1673-8926.2013.06.004

Lithologic Reservoirs ›› 2013, Vol. 25 ›› Issue (6): 20-24.doi: 10.3969/j.issn.1673-8926.2013.06.004

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Analysis of influencing factors of early productivity of Chang 10 reservoir in Ansai Oilfield

LI Tao ^1，2， ZHANG Huaiguang^1，3， QU Chunxia^1，2， YANG Weiguo^1，2

（1. Research Institute of Exploration and Development， PetroChina Changqing Oilfield Company， Xi’an 710018， China； 2. National Engineering Laboratory for Exploration and Development of Low-permeability Oil and Gas Field， Xi’an 710018， China； 3. No. 4 Oil Production Plant， PetroChina Changqing Oilfield Company， Jingbian 718500， China

Online:2013-11-26 Published:2013-11-26

Abstract

Abstract:

Based on the analysis of the early productivity distribution of Chang 10 reservoir in G52 well field of Ansai Oilfield, this paper analyzed the influence of sedimentary microfacies and diagenesis（diagenetic facies） on the early productivity. The result shows that the early productivity distribution is closely related to sedimentary microfacies. Distributarychannel has a higher earlyproductivityfor the precession ofthick sand beds, thick oil reservoirs, relatively high porosityand permeability, whereas the channel edge has a lower earlyproductivitybecause ofits opposite features against the distributary channel. The early productivity is subjected to the effect of diagenesis（diagenetic facies）. For the decline of reservoir properties, the early productivity of strong corrosion lithofacies reservoirs, corrosion lithofacies reservoirs and corrosion-chlorite cementation lithofacies reservoirs reveals the same trend. Gradual intensity of the destructive diagenesis heading southwest resulted in poor reservoir properties and thus accounts for rather lowor even noearlyproductivity.

Key words: bottom water reservoir, horizontal well, water cut, numerical simulation, Box-Behnken design, influencing factors

LI Tao， ZHANG Huaiguang， QU Chunxia， YANG Weiguo. Analysis of influencing factors of early productivity of Chang 10 reservoir in Ansai Oilfield[J].Lithologic Reservoirs, 2013, 25(6): 20-24.

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