Production System of Horizontal Well in Shale Oil Reservoirs of Chang 7 Member, Ordos Basin

doi:10.7657/XJPG20220310

Abstract

Abstract:

To ensure the production of shale oil in Chang 7 member, Ordos basin, this paper discussed the production system of the horizontal well in Chang 7 member based on the theoretical research and production data. By establishing the relationship between the distance of the pressure propagation boundary from fractures induced by volume fracturing in horizontal well and the time, and assuming that the pressure propagated to the boundary does not change with time, the reasonable well soaking period is determined to be 40 d. It is considered that the high-watercut drainage stage ends when the analyzed salinity of the produced water is similar to the salinity of initial formation water, or the replacement rate of fracturing fluid in horizontal wells is greater than 60%. By quantitatively analyzing the production profile of a single section and a 100-m horizontal section in the horizontal well, the dynamic relationship was established for determining a reasonable fluid production for each stage.

Key words: Ordos basin, shale oil, horizontal well, volume fracturing, quasi-natural energy, well soaking, drainage, production system

CLC Number:

TE155

WAN Xiaolong, ZHANG Yuanli, FAN Jianming, LI Zhen, ZHANG Chao. Production System of Horizontal Well in Shale Oil Reservoirs of Chang 7 Member, Ordos Basin[J]. Xinjiang Petroleum Geology, 2022, 43(3): 329-334.

Figures/Tables 7

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