Lithologic Reservoirs ›› 2013, Vol. 25 ›› Issue (6): 14-19.doi: 10.3969/j.issn.1673-8926.2013.06.003

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Sedimentary facies of the lower Lulehe Formation in Qie 16 well block of Kunbei Oilfield

MO Fengyang1， MU Zhonghai1， CHANG Lin2， YOU Chao2， XU Le1   

  1. 1. Southwest Petroleum University， Chengdu 610500， China； 2. Research Institute of Exploration and Development， PetroChina Qinghai Oilfield Company， Dunhuang 736202， China； 3. No. 2 Oil Production Plant， PetroChina Qinghai Oilfield Company， Haixi 610400， China
  • Online:2013-11-26 Published:2013-11-26

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Abstract:

Based on the regional geologic backgrounds, combined with core features and well logging data, this paper studied the facies of the lower Lulehe Formation in Qie 16 well block of Kunbei Oilfield by systemic analysis of the lithologic characteristics, structures and logging interpretation. The alluvial fan was developed in the target stratum, which could be further divided into two sub-facies of top-fan and middle-fan, and six microfacies of mud-rock flow, stream ditch, ditch beach, braided stream line, braided stream sand island and overflow belt. The distribution characteristics of facies were revealed by the lithologic column and plane distribution diagram of facies about single well. The target stratum shows the features of retrogradation alluvial fan. The depositional pattern was built up and the favorable microfacies belt was evaluated, which provides theory foundation for the further exploration and development in the target stratum of Qie 16 well block.

Key words: early productivity, geological factors, Chang10 reservoir, Ansai Oilfield

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