Exploration of geology-engineering integration in hard-to-recover oil reserves in the Shengli Oilfield

WAN Xuxin1 XIE Guanglong1 DING Yugang1

(1.Sinopec Shengli Oilfield Co., Ltd., China)
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【Abstract】Effective development of hard-to-recover oil reserves is an important measure to enhance oil development in China. The hard-to-recover reserves of low permeability and heavy oil in the Shengli Oilfield are nearly 6 × 108 t, accounting for more than 10% of the nation. Effective development faces many challenges such as complex oil-water system, lack of supporting technologies, and low productivity. Sinopec took Shengli Oilfield as a pilot project. After more than two years of cooperative development practice, it has explored a number of effective methods such as “innovation of cooperative mechanism”, “searching for sweet spots in low-grade reserves”, “geology–engineering integration”, “fine reservoir stimulation to increase productivity”. It has preliminarily achieved the goal of “management, recovery, and prodution”, the hard-to-recover oil reserves. The cumulative produced oil reserves are 4 860 × 104 t, established productivity is over 50 × 104 t, the drilling cycle is shortened by more than 60%, single well production is increased by about 40%, and the break-even oil price is dropped from 75/bbl to within 50/bbl. The practice of producing hard-to-recover oil reserves in Shengli Oilfield has initially formed a unique contracted productivity establishment plan and created an efficient model of geology–engineering integration of the whole industry chain, which has opened up a new direction for the sustainable development of mature oil areas with high degree of exploration.

【Keywords】 hard-to-recover oil reserves; low permeability; heavy oil; cooperative development; geology-engineering integration;

【DOI】

【Funds】 Key Science and Technology Research Program of Sinopec Shengli Oilfield Co., Ltd. “Supporting Technology for Profitable Utilization of Hard-to-recover Oil Reserves” (SHGC2017-8)

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This Article

ISSN:1672-7703

CN: 11-5215/TE

Vol 25, No. 02, Pages 43-50

March 2020

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Abstract

  • 0 Introduction
  • 1 Mechanism innovation lays the foundation for cooperation
  • 2 Looking for “sweet spots” in low-grade reserves
  • 3 Geology–engineering integration to increase speed and efficiency
  • 4 Fine reservoir stimulation to increase productivity
  • 5 Conclusions
  • References